./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec1_product31.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_spec1_product31.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 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:55:34,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:55:34,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:55:34,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:55:34,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:55:34,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:55:34,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:55:34,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:55:34,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:55:34,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:55:34,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:55:34,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:55:34,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:55:34,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:55:34,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:55:34,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:55:34,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:55:34,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:55:34,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:55:34,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:55:34,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:55:34,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:55:34,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:55:34,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:55:34,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:55:34,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:55:34,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:55:34,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:55:34,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:55:34,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:55:34,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:55:34,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:55:34,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:55:34,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:55:34,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:55:34,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:55:34,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:55:34,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:55:34,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:55:34,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:55:34,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:55:34,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:55:34,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:55:34,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:55:34,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:55:34,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:55:34,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:55:34,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:55:34,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:55:34,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:55:34,681 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:55:34,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:55:34,682 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:55:34,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:55:34,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:55:34,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:55:34,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:55:34,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:55:34,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:55:34,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:55:34,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:55:34,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:55:34,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:55:34,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:55:34,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-12-21 12:55:34,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:55:34,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:55:34,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:55:34,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:55:34,862 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:55:34,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-12-21 12:55:34,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26fc6c94/6d86cc6333ec45a390f96bca96994b20/FLAGd53706704 [2021-12-21 12:55:35,408 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:55:35,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-12-21 12:55:35,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26fc6c94/6d86cc6333ec45a390f96bca96994b20/FLAGd53706704 [2021-12-21 12:55:35,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26fc6c94/6d86cc6333ec45a390f96bca96994b20 [2021-12-21 12:55:35,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:55:35,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:55:35,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:55:35,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:55:35,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:55:35,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:55:35" (1/1) ... [2021-12-21 12:55:35,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f68cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:35, skipping insertion in model container [2021-12-21 12:55:35,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:55:35" (1/1) ... [2021-12-21 12:55:35,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:55:35,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:55:35,994 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_spec1_product31.cil.c[11232,11245] [2021-12-21 12:55:36,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:55:36,154 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:55:36,181 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_spec1_product31.cil.c[11232,11245] [2021-12-21 12:55:36,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:55:36,240 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:55:36,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36 WrapperNode [2021-12-21 12:55:36,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:55:36,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:55:36,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:55:36,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:55:36,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,310 INFO L137 Inliner]: procedures = 97, calls = 350, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 955 [2021-12-21 12:55:36,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:55:36,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:55:36,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:55:36,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:55:36,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:55:36,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:55:36,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:55:36,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:55:36,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (1/1) ... [2021-12-21 12:55:36,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:55:36,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:36,418 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 12:55:36,428 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 12:55:36,453 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-21 12:55:36,453 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-21 12:55:36,454 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-21 12:55:36,454 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-21 12:55:36,454 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-21 12:55:36,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-21 12:55:36,454 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-12-21 12:55:36,455 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-12-21 12:55:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-21 12:55:36,455 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-21 12:55:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-21 12:55:36,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-21 12:55:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-21 12:55:36,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-21 12:55:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-21 12:55:36,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-21 12:55:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-21 12:55:36,456 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-21 12:55:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-21 12:55:36,457 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-21 12:55:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-21 12:55:36,457 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-21 12:55:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-21 12:55:36,457 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-21 12:55:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:55:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-12-21 12:55:36,457 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-12-21 12:55:36,458 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-21 12:55:36,458 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-21 12:55:36,458 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-12-21 12:55:36,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-12-21 12:55:36,458 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-21 12:55:36,458 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-21 12:55:36,458 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-21 12:55:36,458 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-21 12:55:36,459 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-21 12:55:36,459 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-21 12:55:36,459 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-21 12:55:36,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-21 12:55:36,459 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-21 12:55:36,459 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-21 12:55:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-21 12:55:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-21 12:55:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-21 12:55:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-21 12:55:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-21 12:55:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-21 12:55:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-21 12:55:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-21 12:55:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-21 12:55:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-21 12:55:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:55:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-21 12:55:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-21 12:55:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:55:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:55:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-21 12:55:36,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-21 12:55:36,567 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:55:36,569 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:55:37,350 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:55:37,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:55:37,364 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:55:37,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:55:37 BoogieIcfgContainer [2021-12-21 12:55:37,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:55:37,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:55:37,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:55:37,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:55:37,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:55:35" (1/3) ... [2021-12-21 12:55:37,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d652099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:55:37, skipping insertion in model container [2021-12-21 12:55:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:55:36" (2/3) ... [2021-12-21 12:55:37,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d652099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:55:37, skipping insertion in model container [2021-12-21 12:55:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:55:37" (3/3) ... [2021-12-21 12:55:37,373 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2021-12-21 12:55:37,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:55:37,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:55:37,416 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:55:37,420 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 12:55:37,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:55:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 469 states have (on average 1.67590618336887) internal successors, (786), 490 states have internal predecessors, (786), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:55:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-21 12:55:37,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:37,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:37,479 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1605803349, now seen corresponding path program 1 times [2021-12-21 12:55:37,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:37,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124301514] [2021-12-21 12:55:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:37,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:37,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:37,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:55:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 12:55:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:55:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 12:55:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:38,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124301514] [2021-12-21 12:55:38,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124301514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:38,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777757232] [2021-12-21 12:55:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:38,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:38,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:38,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:55:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:55:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 12:55:38,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777757232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:38,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:38,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-21 12:55:38,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807102945] [2021-12-21 12:55:38,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:38,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:55:38,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:55:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:55:38,888 INFO L87 Difference]: Start difference. First operand has 603 states, 469 states have (on average 1.67590618336887) internal successors, (786), 490 states have internal predecessors, (786), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-21 12:55:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:38,946 INFO L93 Difference]: Finished difference Result 624 states and 1026 transitions. [2021-12-21 12:55:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:55:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2021-12-21 12:55:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:38,960 INFO L225 Difference]: With dead ends: 624 [2021-12-21 12:55:38,960 INFO L226 Difference]: Without dead ends: 595 [2021-12-21 12:55:38,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:55:38,964 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:38,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-21 12:55:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-12-21 12:55:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.673866090712743) internal successors, (775), 482 states have internal predecessors, (775), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-12-21 12:55:39,031 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 127 [2021-12-21 12:55:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:39,032 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-12-21 12:55:39,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-21 12:55:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-12-21 12:55:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 12:55:39,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:39,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:39,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-21 12:55:39,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 564114879, now seen corresponding path program 1 times [2021-12-21 12:55:39,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:39,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040997630] [2021-12-21 12:55:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:39,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:55:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 12:55:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:55:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 12:55:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:39,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:39,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040997630] [2021-12-21 12:55:39,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040997630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:39,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110593428] [2021-12-21 12:55:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:39,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:39,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:39,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:39,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:55:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:55:40,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:40,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110593428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:40,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:40,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:40,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777623904] [2021-12-21 12:55:40,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:40,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:40,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:40,177 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:40,258 INFO L93 Difference]: Finished difference Result 1181 states and 1952 transitions. [2021-12-21 12:55:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:55:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-12-21 12:55:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:40,263 INFO L225 Difference]: With dead ends: 1181 [2021-12-21 12:55:40,265 INFO L226 Difference]: Without dead ends: 595 [2021-12-21 12:55:40,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:40,272 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 14 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:40,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2891 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-21 12:55:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-12-21 12:55:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.6717062634989202) internal successors, (774), 482 states have internal predecessors, (774), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 979 transitions. [2021-12-21 12:55:40,303 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 979 transitions. Word has length 129 [2021-12-21 12:55:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:40,303 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 979 transitions. [2021-12-21 12:55:40,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 979 transitions. [2021-12-21 12:55:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 12:55:40,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:40,307 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:40,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:40,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-21 12:55:40,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1401786623, now seen corresponding path program 1 times [2021-12-21 12:55:40,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:40,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113137425] [2021-12-21 12:55:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:40,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 12:55:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 12:55:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:40,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113137425] [2021-12-21 12:55:40,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113137425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698892881] [2021-12-21 12:55:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:40,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:40,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:40,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:55:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:55:41,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:41,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698892881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:41,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:41,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:41,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896785741] [2021-12-21 12:55:41,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:41,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:41,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:41,270 INFO L87 Difference]: Start difference. First operand 595 states and 979 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:41,328 INFO L93 Difference]: Finished difference Result 1181 states and 1950 transitions. [2021-12-21 12:55:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:55:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-12-21 12:55:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:41,332 INFO L225 Difference]: With dead ends: 1181 [2021-12-21 12:55:41,332 INFO L226 Difference]: Without dead ends: 595 [2021-12-21 12:55:41,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:41,335 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 12 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:41,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2891 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-21 12:55:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-12-21 12:55:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.6695464362850971) internal successors, (773), 482 states have internal predecessors, (773), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 978 transitions. [2021-12-21 12:55:41,353 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 978 transitions. Word has length 131 [2021-12-21 12:55:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:41,353 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 978 transitions. [2021-12-21 12:55:41,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 978 transitions. [2021-12-21 12:55:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 12:55:41,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:41,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:41,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:41,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:41,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash -648589249, now seen corresponding path program 1 times [2021-12-21 12:55:41,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:41,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392102089] [2021-12-21 12:55:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:41,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 12:55:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 12:55:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:41,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392102089] [2021-12-21 12:55:41,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392102089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323810029] [2021-12-21 12:55:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:41,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:41,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:41,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:55:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:55:42,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:42,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323810029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:42,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:42,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:42,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947681045] [2021-12-21 12:55:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:42,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:42,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:42,252 INFO L87 Difference]: Start difference. First operand 595 states and 978 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:42,304 INFO L93 Difference]: Finished difference Result 1188 states and 1957 transitions. [2021-12-21 12:55:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-12-21 12:55:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:42,307 INFO L225 Difference]: With dead ends: 1188 [2021-12-21 12:55:42,307 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 12:55:42,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:42,310 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 20 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:42,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2891 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 12:55:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-12-21 12:55:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 490 states have internal predecessors, (785), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 990 transitions. [2021-12-21 12:55:42,325 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 990 transitions. Word has length 133 [2021-12-21 12:55:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:42,325 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 990 transitions. [2021-12-21 12:55:42,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 990 transitions. [2021-12-21 12:55:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 12:55:42,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:42,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:42,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:42,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash -7038281, now seen corresponding path program 1 times [2021-12-21 12:55:42,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520516578] [2021-12-21 12:55:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:42,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 12:55:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 12:55:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 12:55:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:42,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:42,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520516578] [2021-12-21 12:55:42,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520516578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:42,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717778391] [2021-12-21 12:55:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:42,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:42,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:42,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:55:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:55:43,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717778391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:43,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:43,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425658136] [2021-12-21 12:55:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:43,313 INFO L87 Difference]: Start difference. First operand 604 states and 990 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:43,364 INFO L93 Difference]: Finished difference Result 1190 states and 1958 transitions. [2021-12-21 12:55:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-12-21 12:55:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:43,367 INFO L225 Difference]: With dead ends: 1190 [2021-12-21 12:55:43,368 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 12:55:43,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:43,370 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 18 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:43,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2891 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 12:55:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-12-21 12:55:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 471 states have (on average 1.664543524416136) internal successors, (784), 490 states have internal predecessors, (784), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 989 transitions. [2021-12-21 12:55:43,386 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 989 transitions. Word has length 134 [2021-12-21 12:55:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:43,387 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 989 transitions. [2021-12-21 12:55:43,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 989 transitions. [2021-12-21 12:55:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 12:55:43,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:43,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:43,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:43,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 136827971, now seen corresponding path program 1 times [2021-12-21 12:55:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793330176] [2021-12-21 12:55:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:43,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:55:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 12:55:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 12:55:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:43,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:43,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793330176] [2021-12-21 12:55:43,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793330176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:43,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873239547] [2021-12-21 12:55:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:43,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:43,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:43,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:43,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:55:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:55:44,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:44,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873239547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:44,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:44,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:44,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362227273] [2021-12-21 12:55:44,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:44,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:44,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:44,368 INFO L87 Difference]: Start difference. First operand 604 states and 989 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:44,412 INFO L93 Difference]: Finished difference Result 1190 states and 1957 transitions. [2021-12-21 12:55:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-12-21 12:55:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:44,417 INFO L225 Difference]: With dead ends: 1190 [2021-12-21 12:55:44,417 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 12:55:44,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:44,423 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 17 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:44,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2891 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 12:55:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-12-21 12:55:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 471 states have (on average 1.6624203821656052) internal successors, (783), 490 states have internal predecessors, (783), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 988 transitions. [2021-12-21 12:55:44,467 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 988 transitions. Word has length 135 [2021-12-21 12:55:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:44,468 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 988 transitions. [2021-12-21 12:55:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 988 transitions. [2021-12-21 12:55:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 12:55:44,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:44,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:44,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:44,671 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2032337211, now seen corresponding path program 1 times [2021-12-21 12:55:44,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787302202] [2021-12-21 12:55:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:44,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 12:55:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 12:55:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:45,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787302202] [2021-12-21 12:55:45,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787302202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081072941] [2021-12-21 12:55:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:45,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:45,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:45,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:55:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:55:45,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081072941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:45,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:45,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-12-21 12:55:45,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628237393] [2021-12-21 12:55:45,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:45,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:45,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:55:45,488 INFO L87 Difference]: Start difference. First operand 604 states and 988 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:45,588 INFO L93 Difference]: Finished difference Result 1201 states and 1978 transitions. [2021-12-21 12:55:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:55:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-12-21 12:55:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:45,593 INFO L225 Difference]: With dead ends: 1201 [2021-12-21 12:55:45,593 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 12:55:45,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:55:45,595 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 135 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:45,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2708 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 12:55:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-12-21 12:55:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 471 states have (on average 1.6518046709129512) internal successors, (778), 490 states have internal predecessors, (778), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 983 transitions. [2021-12-21 12:55:45,608 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 983 transitions. Word has length 136 [2021-12-21 12:55:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:45,610 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 983 transitions. [2021-12-21 12:55:45,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 983 transitions. [2021-12-21 12:55:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-21 12:55:45,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:45,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:45,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:45,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 282887021, now seen corresponding path program 1 times [2021-12-21 12:55:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368435103] [2021-12-21 12:55:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:45,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 12:55:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 12:55:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:46,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368435103] [2021-12-21 12:55:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368435103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936707323] [2021-12-21 12:55:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:46,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:46,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:46,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:55:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:55:46,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:46,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936707323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:46,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:46,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-12-21 12:55:46,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094552242] [2021-12-21 12:55:46,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:46,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:46,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:55:46,598 INFO L87 Difference]: Start difference. First operand 604 states and 983 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:46,689 INFO L93 Difference]: Finished difference Result 1201 states and 1968 transitions. [2021-12-21 12:55:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:55:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 138 [2021-12-21 12:55:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:46,695 INFO L225 Difference]: With dead ends: 1201 [2021-12-21 12:55:46,695 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 12:55:46,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:55:46,698 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 129 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:46,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2708 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 12:55:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-12-21 12:55:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 471 states have (on average 1.6411889596602973) internal successors, (773), 490 states have internal predecessors, (773), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 978 transitions. [2021-12-21 12:55:46,712 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 978 transitions. Word has length 138 [2021-12-21 12:55:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:46,712 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 978 transitions. [2021-12-21 12:55:46,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 978 transitions. [2021-12-21 12:55:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-21 12:55:46,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:46,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:46,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:46,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-21 12:55:46,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash 442168091, now seen corresponding path program 1 times [2021-12-21 12:55:46,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484614028] [2021-12-21 12:55:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:46,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 12:55:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:55:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:47,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:47,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484614028] [2021-12-21 12:55:47,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484614028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:47,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365104373] [2021-12-21 12:55:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:47,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:47,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:47,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:55:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:47,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:55:47,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:47,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365104373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:47,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:47,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-12-21 12:55:47,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798337026] [2021-12-21 12:55:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:55:47,750 INFO L87 Difference]: Start difference. First operand 604 states and 978 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:47,868 INFO L93 Difference]: Finished difference Result 1237 states and 2017 transitions. [2021-12-21 12:55:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 140 [2021-12-21 12:55:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:47,872 INFO L225 Difference]: With dead ends: 1237 [2021-12-21 12:55:47,872 INFO L226 Difference]: Without dead ends: 655 [2021-12-21 12:55:47,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:55:47,875 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 179 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:47,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2718 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-12-21 12:55:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2021-12-21 12:55:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 521 states have (on average 1.6468330134357005) internal successors, (858), 540 states have internal predecessors, (858), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1063 transitions. [2021-12-21 12:55:47,891 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1063 transitions. Word has length 140 [2021-12-21 12:55:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:47,891 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1063 transitions. [2021-12-21 12:55:47,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1063 transitions. [2021-12-21 12:55:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 12:55:47,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:47,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:47,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:48,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:48,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1397832491, now seen corresponding path program 1 times [2021-12-21 12:55:48,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60672335] [2021-12-21 12:55:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:48,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 12:55:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:48,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60672335] [2021-12-21 12:55:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60672335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073720203] [2021-12-21 12:55:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:48,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:48,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:48,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:48,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:55:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:55:48,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:48,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073720203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:48,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:48,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-12-21 12:55:48,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876528182] [2021-12-21 12:55:48,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:48,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:48,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:55:48,878 INFO L87 Difference]: Start difference. First operand 655 states and 1063 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:49,003 INFO L93 Difference]: Finished difference Result 1252 states and 2041 transitions. [2021-12-21 12:55:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2021-12-21 12:55:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:49,007 INFO L225 Difference]: With dead ends: 1252 [2021-12-21 12:55:49,007 INFO L226 Difference]: Without dead ends: 655 [2021-12-21 12:55:49,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:55:49,009 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 173 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:49,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2718 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-12-21 12:55:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2021-12-21 12:55:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 521 states have (on average 1.637236084452975) internal successors, (853), 540 states have internal predecessors, (853), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:55:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1058 transitions. [2021-12-21 12:55:49,027 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1058 transitions. Word has length 141 [2021-12-21 12:55:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:49,027 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1058 transitions. [2021-12-21 12:55:49,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1058 transitions. [2021-12-21 12:55:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 12:55:49,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:49,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:49,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:49,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 12:55:49,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1771073174, now seen corresponding path program 1 times [2021-12-21 12:55:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:49,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715001825] [2021-12-21 12:55:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:49,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 12:55:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:55:49,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715001825] [2021-12-21 12:55:49,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715001825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191957709] [2021-12-21 12:55:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:49,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:49,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:49,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:49,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 12:55:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:55:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:55:50,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191957709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:50,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:50,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-21 12:55:50,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975433753] [2021-12-21 12:55:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:55:50,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:55:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:55:50,041 INFO L87 Difference]: Start difference. First operand 655 states and 1058 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:50,173 INFO L93 Difference]: Finished difference Result 1275 states and 2071 transitions. [2021-12-21 12:55:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:55:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-12-21 12:55:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:50,176 INFO L225 Difference]: With dead ends: 1275 [2021-12-21 12:55:50,176 INFO L226 Difference]: Without dead ends: 693 [2021-12-21 12:55:50,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-21 12:55:50,178 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 177 mSDsluCounter, 5580 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:50,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6527 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-12-21 12:55:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 674. [2021-12-21 12:55:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 537 states have (on average 1.6368715083798884) internal successors, (879), 558 states have internal predecessors, (879), 106 states have call successors, (106), 29 states have call predecessors, (106), 30 states have return successors, (103), 99 states have call predecessors, (103), 101 states have call successors, (103) [2021-12-21 12:55:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1088 transitions. [2021-12-21 12:55:50,197 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1088 transitions. Word has length 141 [2021-12-21 12:55:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:50,197 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1088 transitions. [2021-12-21 12:55:50,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1088 transitions. [2021-12-21 12:55:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 12:55:50,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:50,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:50,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 12:55:50,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1297554231, now seen corresponding path program 1 times [2021-12-21 12:55:50,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793742399] [2021-12-21 12:55:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:50,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 12:55:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:55:50,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793742399] [2021-12-21 12:55:50,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793742399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469209600] [2021-12-21 12:55:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:50,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:50,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:50,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 12:55:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:55:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:51,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:51,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469209600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:51,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-21 12:55:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555525440] [2021-12-21 12:55:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:51,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:55:51,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:55:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:55:51,161 INFO L87 Difference]: Start difference. First operand 674 states and 1088 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:51,230 INFO L93 Difference]: Finished difference Result 1213 states and 1971 transitions. [2021-12-21 12:55:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:55:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-12-21 12:55:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:51,234 INFO L225 Difference]: With dead ends: 1213 [2021-12-21 12:55:51,234 INFO L226 Difference]: Without dead ends: 698 [2021-12-21 12:55:51,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:55:51,238 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 134 mSDsluCounter, 4694 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5653 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:51,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5653 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-12-21 12:55:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 693. [2021-12-21 12:55:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 553 states have (on average 1.6365280289330921) internal successors, (905), 576 states have internal predecessors, (905), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1118 transitions. [2021-12-21 12:55:51,255 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1118 transitions. Word has length 141 [2021-12-21 12:55:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1118 transitions. [2021-12-21 12:55:51,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1118 transitions. [2021-12-21 12:55:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 12:55:51,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:51,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:51,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:51,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 12:55:51,476 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash 881505978, now seen corresponding path program 1 times [2021-12-21 12:55:51,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:51,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348547795] [2021-12-21 12:55:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:51,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 12:55:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:55:51,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:51,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348547795] [2021-12-21 12:55:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348547795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:51,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208898993] [2021-12-21 12:55:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:51,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:51,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:51,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 12:55:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:55:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:52,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:52,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208898993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:52,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:52,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-21 12:55:52,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626206962] [2021-12-21 12:55:52,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:55:52,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:52,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:55:52,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:55:52,280 INFO L87 Difference]: Start difference. First operand 693 states and 1118 transitions. Second operand has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:52,367 INFO L93 Difference]: Finished difference Result 1243 states and 2022 transitions. [2021-12-21 12:55:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:55:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2021-12-21 12:55:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:52,371 INFO L225 Difference]: With dead ends: 1243 [2021-12-21 12:55:52,371 INFO L226 Difference]: Without dead ends: 728 [2021-12-21 12:55:52,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:55:52,373 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 143 mSDsluCounter, 4684 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:52,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5643 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-21 12:55:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 693. [2021-12-21 12:55:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 553 states have (on average 1.6365280289330921) internal successors, (905), 576 states have internal predecessors, (905), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1118 transitions. [2021-12-21 12:55:52,387 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1118 transitions. Word has length 142 [2021-12-21 12:55:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:52,387 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1118 transitions. [2021-12-21 12:55:52,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1118 transitions. [2021-12-21 12:55:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 12:55:52,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:52,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:52,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 12:55:52,603 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -378981574, now seen corresponding path program 1 times [2021-12-21 12:55:52,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289863455] [2021-12-21 12:55:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:52,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 12:55:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:55:52,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289863455] [2021-12-21 12:55:52,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289863455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961388099] [2021-12-21 12:55:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:52,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:52,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:52,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:52,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 12:55:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:55:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:53,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961388099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:53,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:53,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-21 12:55:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547518430] [2021-12-21 12:55:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:53,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:55:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:55:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:55:53,376 INFO L87 Difference]: Start difference. First operand 693 states and 1118 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:53,476 INFO L93 Difference]: Finished difference Result 1228 states and 1996 transitions. [2021-12-21 12:55:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:55:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2021-12-21 12:55:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:53,479 INFO L225 Difference]: With dead ends: 1228 [2021-12-21 12:55:53,479 INFO L226 Difference]: Without dead ends: 713 [2021-12-21 12:55:53,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:55:53,481 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 177 mSDsluCounter, 5586 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6535 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:53,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6535 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-12-21 12:55:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 693. [2021-12-21 12:55:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 553 states have (on average 1.6365280289330921) internal successors, (905), 576 states have internal predecessors, (905), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1118 transitions. [2021-12-21 12:55:53,495 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1118 transitions. Word has length 142 [2021-12-21 12:55:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:53,495 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1118 transitions. [2021-12-21 12:55:53,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1118 transitions. [2021-12-21 12:55:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 12:55:53,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:53,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:53,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:53,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:53,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 661904655, now seen corresponding path program 1 times [2021-12-21 12:55:53,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994872298] [2021-12-21 12:55:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:53,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 12:55:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 12:55:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:53,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 12:55:54,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994872298] [2021-12-21 12:55:54,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994872298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274273608] [2021-12-21 12:55:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:54,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:54,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:54,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:54,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 12:55:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:55:54,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 12:55:54,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:54,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274273608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:54,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:54,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:54,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104291386] [2021-12-21 12:55:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:54,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:54,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:54,410 INFO L87 Difference]: Start difference. First operand 693 states and 1118 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:54,469 INFO L93 Difference]: Finished difference Result 1280 states and 2081 transitions. [2021-12-21 12:55:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:55:54,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 142 [2021-12-21 12:55:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:54,472 INFO L225 Difference]: With dead ends: 1280 [2021-12-21 12:55:54,472 INFO L226 Difference]: Without dead ends: 693 [2021-12-21 12:55:54,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:54,476 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 23 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:54,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2860 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-12-21 12:55:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2021-12-21 12:55:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 553 states have (on average 1.6292947558770343) internal successors, (901), 576 states have internal predecessors, (901), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1114 transitions. [2021-12-21 12:55:54,490 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1114 transitions. Word has length 142 [2021-12-21 12:55:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1114 transitions. [2021-12-21 12:55:54,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1114 transitions. [2021-12-21 12:55:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 12:55:54,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:54,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:54,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:54,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 12:55:54,707 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1540853249, now seen corresponding path program 1 times [2021-12-21 12:55:54,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863711980] [2021-12-21 12:55:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:54,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 12:55:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:55:54,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863711980] [2021-12-21 12:55:54,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863711980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890631238] [2021-12-21 12:55:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:54,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:54,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:55,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 12:55:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:55:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 12:55:55,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890631238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:55,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:55,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-21 12:55:55,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645263158] [2021-12-21 12:55:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:55,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:55:55,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:55:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:55:55,453 INFO L87 Difference]: Start difference. First operand 693 states and 1114 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:55,567 INFO L93 Difference]: Finished difference Result 1228 states and 1993 transitions. [2021-12-21 12:55:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:55:55,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 143 [2021-12-21 12:55:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:55,571 INFO L225 Difference]: With dead ends: 1228 [2021-12-21 12:55:55,571 INFO L226 Difference]: Without dead ends: 713 [2021-12-21 12:55:55,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:55:55,573 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 185 mSDsluCounter, 5548 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6491 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6491 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:55:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-12-21 12:55:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 693. [2021-12-21 12:55:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 553 states have (on average 1.6292947558770343) internal successors, (901), 576 states have internal predecessors, (901), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1114 transitions. [2021-12-21 12:55:55,587 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1114 transitions. Word has length 143 [2021-12-21 12:55:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:55,587 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1114 transitions. [2021-12-21 12:55:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 12:55:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1114 transitions. [2021-12-21 12:55:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 12:55:55,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:55,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:55,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 12:55:55,803 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash -825053281, now seen corresponding path program 1 times [2021-12-21 12:55:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188721750] [2021-12-21 12:55:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:55,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:55:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:55:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:55:56,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188721750] [2021-12-21 12:55:56,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188721750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862376135] [2021-12-21 12:55:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:56,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:56,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 12:55:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:55:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 12:55:56,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:56,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862376135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:56,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:56,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:55:56,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451894810] [2021-12-21 12:55:56,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:55:56,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:55:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:55:56,501 INFO L87 Difference]: Start difference. First operand 693 states and 1114 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:56,551 INFO L93 Difference]: Finished difference Result 1336 states and 2163 transitions. [2021-12-21 12:55:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:55:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 144 [2021-12-21 12:55:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:56,554 INFO L225 Difference]: With dead ends: 1336 [2021-12-21 12:55:56,554 INFO L226 Difference]: Without dead ends: 729 [2021-12-21 12:55:56,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:56,556 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 38 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:56,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2836 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:55:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-12-21 12:55:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 717. [2021-12-21 12:55:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 577 states have (on average 1.610051993067591) internal successors, (929), 600 states have internal predecessors, (929), 107 states have call successors, (107), 29 states have call predecessors, (107), 32 states have return successors, (106), 100 states have call predecessors, (106), 102 states have call successors, (106) [2021-12-21 12:55:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1142 transitions. [2021-12-21 12:55:56,571 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1142 transitions. Word has length 144 [2021-12-21 12:55:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:56,572 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1142 transitions. [2021-12-21 12:55:56,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 12:55:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1142 transitions. [2021-12-21 12:55:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 12:55:56,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:56,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:56,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:56,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 12:55:56,787 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 898136170, now seen corresponding path program 1 times [2021-12-21 12:55:56,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:56,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793228972] [2021-12-21 12:55:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:56,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:56,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:55:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 12:55:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:55:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:55:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:55:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 12:55:57,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:57,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793228972] [2021-12-21 12:55:57,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793228972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:57,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806689321] [2021-12-21 12:55:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:57,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:57,087 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:57,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 12:55:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:55:57,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:55:57,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806689321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:57,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:57,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 12:55:57,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968803425] [2021-12-21 12:55:57,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:57,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:55:57,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:55:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:57,491 INFO L87 Difference]: Start difference. First operand 717 states and 1142 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:55:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:57,891 INFO L93 Difference]: Finished difference Result 1235 states and 2018 transitions. [2021-12-21 12:55:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:55:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 144 [2021-12-21 12:55:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:57,894 INFO L225 Difference]: With dead ends: 1235 [2021-12-21 12:55:57,894 INFO L226 Difference]: Without dead ends: 725 [2021-12-21 12:55:57,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:55:57,896 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 900 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:57,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2427 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:55:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-21 12:55:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2021-12-21 12:55:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 584 states have (on average 1.6113013698630136) internal successors, (941), 607 states have internal predecessors, (941), 107 states have call successors, (107), 30 states have call predecessors, (107), 33 states have return successors, (107), 100 states have call predecessors, (107), 102 states have call successors, (107) [2021-12-21 12:55:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1155 transitions. [2021-12-21 12:55:57,912 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1155 transitions. Word has length 144 [2021-12-21 12:55:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:57,912 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1155 transitions. [2021-12-21 12:55:57,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:55:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1155 transitions. [2021-12-21 12:55:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-21 12:55:57,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:57,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:57,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:58,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 12:55:58,135 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312238, now seen corresponding path program 1 times [2021-12-21 12:55:58,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:58,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812842719] [2021-12-21 12:55:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:58,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:55:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 12:55:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 12:55:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 12:55:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 12:55:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 12:55:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:55:58,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:58,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812842719] [2021-12-21 12:55:58,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812842719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:58,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062714813] [2021-12-21 12:55:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:58,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:58,405 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:58,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 12:55:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:55:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:55:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:55:58,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:55:58,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062714813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:55:58,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:55:58,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 12:55:58,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475328072] [2021-12-21 12:55:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:55:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:55:58,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:55:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:55:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:55:58,881 INFO L87 Difference]: Start difference. First operand 725 states and 1155 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:55:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:55:59,287 INFO L93 Difference]: Finished difference Result 1251 states and 2041 transitions. [2021-12-21 12:55:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:55:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 146 [2021-12-21 12:55:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:55:59,292 INFO L225 Difference]: With dead ends: 1251 [2021-12-21 12:55:59,292 INFO L226 Difference]: Without dead ends: 733 [2021-12-21 12:55:59,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:55:59,294 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 896 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:55:59,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 2427 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:55:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-21 12:55:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2021-12-21 12:55:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 591 states have (on average 1.6125211505922166) internal successors, (953), 614 states have internal predecessors, (953), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (108), 100 states have call predecessors, (108), 102 states have call successors, (108) [2021-12-21 12:55:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1168 transitions. [2021-12-21 12:55:59,309 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1168 transitions. Word has length 146 [2021-12-21 12:55:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:55:59,309 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1168 transitions. [2021-12-21 12:55:59,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:55:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1168 transitions. [2021-12-21 12:55:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-21 12:55:59,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:55:59,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:59,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 12:55:59,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:59,531 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:55:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:55:59,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1848581162, now seen corresponding path program 1 times [2021-12-21 12:55:59,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:55:59,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444504299] [2021-12-21 12:55:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:59,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:55:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:55:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:55:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:55:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:55:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:55:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 12:55:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:55:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:55:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 12:55:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 12:55:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:55:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 12:55:59,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:55:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444504299] [2021-12-21 12:55:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444504299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:55:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540657128] [2021-12-21 12:55:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:55:59,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:55:59,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:55:59,825 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:55:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 12:56:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:56:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:56:00,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540657128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:00,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:00,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 12:56:00,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230012664] [2021-12-21 12:56:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:00,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:56:00,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:56:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:00,287 INFO L87 Difference]: Start difference. First operand 733 states and 1168 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:56:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:00,629 INFO L93 Difference]: Finished difference Result 1267 states and 2064 transitions. [2021-12-21 12:56:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 148 [2021-12-21 12:56:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:00,632 INFO L225 Difference]: With dead ends: 1267 [2021-12-21 12:56:00,632 INFO L226 Difference]: Without dead ends: 741 [2021-12-21 12:56:00,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:56:00,634 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 892 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:00,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2427 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 12:56:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-21 12:56:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2021-12-21 12:56:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 598 states have (on average 1.6137123745819397) internal successors, (965), 621 states have internal predecessors, (965), 107 states have call successors, (107), 32 states have call predecessors, (107), 35 states have return successors, (109), 100 states have call predecessors, (109), 102 states have call successors, (109) [2021-12-21 12:56:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1181 transitions. [2021-12-21 12:56:00,654 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1181 transitions. Word has length 148 [2021-12-21 12:56:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:00,655 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1181 transitions. [2021-12-21 12:56:00,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:56:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1181 transitions. [2021-12-21 12:56:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-21 12:56:00,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:00,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:00,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:00,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:00,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1861706806, now seen corresponding path program 1 times [2021-12-21 12:56:00,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663448216] [2021-12-21 12:56:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:00,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:00,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:56:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:56:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 12:56:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 12:56:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 12:56:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 12:56:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 12:56:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 12:56:01,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663448216] [2021-12-21 12:56:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663448216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736642479] [2021-12-21 12:56:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:01,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:01,209 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:01,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 12:56:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:56:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:56:01,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736642479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:01,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:01,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 12:56:01,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379141017] [2021-12-21 12:56:01,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:01,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:56:01,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:56:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:01,658 INFO L87 Difference]: Start difference. First operand 741 states and 1181 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:56:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:02,003 INFO L93 Difference]: Finished difference Result 1283 states and 2087 transitions. [2021-12-21 12:56:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 150 [2021-12-21 12:56:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:02,007 INFO L225 Difference]: With dead ends: 1283 [2021-12-21 12:56:02,007 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 12:56:02,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:56:02,009 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 900 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:02,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2427 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 12:56:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 12:56:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-12-21 12:56:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 605 states have (on average 1.6148760330578513) internal successors, (977), 628 states have internal predecessors, (977), 107 states have call successors, (107), 33 states have call predecessors, (107), 36 states have return successors, (110), 100 states have call predecessors, (110), 102 states have call successors, (110) [2021-12-21 12:56:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1194 transitions. [2021-12-21 12:56:02,027 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1194 transitions. Word has length 150 [2021-12-21 12:56:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:02,027 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1194 transitions. [2021-12-21 12:56:02,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 12:56:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1194 transitions. [2021-12-21 12:56:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-21 12:56:02,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:02,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:02,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:02,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:02,240 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 328728042, now seen corresponding path program 1 times [2021-12-21 12:56:02,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230616302] [2021-12-21 12:56:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:02,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:56:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:56:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 12:56:02,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230616302] [2021-12-21 12:56:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230616302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541975479] [2021-12-21 12:56:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:02,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:02,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:02,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 12:56:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:02,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:56:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 12:56:02,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541975479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:02,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 12:56:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504794839] [2021-12-21 12:56:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:02,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:56:02,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:56:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:02,986 INFO L87 Difference]: Start difference. First operand 749 states and 1194 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-21 12:56:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:03,375 INFO L93 Difference]: Finished difference Result 798 states and 1266 transitions. [2021-12-21 12:56:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:56:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 152 [2021-12-21 12:56:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:03,393 INFO L225 Difference]: With dead ends: 798 [2021-12-21 12:56:03,393 INFO L226 Difference]: Without dead ends: 783 [2021-12-21 12:56:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:03,395 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 893 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 2471 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:03,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 2471 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:56:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-12-21 12:56:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 752. [2021-12-21 12:56:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 608 states have (on average 1.611842105263158) internal successors, (980), 631 states have internal predecessors, (980), 107 states have call successors, (107), 33 states have call predecessors, (107), 36 states have return successors, (110), 100 states have call predecessors, (110), 102 states have call successors, (110) [2021-12-21 12:56:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1197 transitions. [2021-12-21 12:56:03,424 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1197 transitions. Word has length 152 [2021-12-21 12:56:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:03,424 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1197 transitions. [2021-12-21 12:56:03,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-21 12:56:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1197 transitions. [2021-12-21 12:56:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-21 12:56:03,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:03,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:03,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:03,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:03,642 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 76368741, now seen corresponding path program 1 times [2021-12-21 12:56:03,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:03,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752882751] [2021-12-21 12:56:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:03,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:56:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:56:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 12:56:03,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752882751] [2021-12-21 12:56:03,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752882751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258753451] [2021-12-21 12:56:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:03,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:03,913 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:03,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 12:56:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:56:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 12:56:04,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258753451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:04,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-21 12:56:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802694827] [2021-12-21 12:56:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:04,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:56:04,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:56:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:04,313 INFO L87 Difference]: Start difference. First operand 752 states and 1197 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-21 12:56:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:04,335 INFO L93 Difference]: Finished difference Result 769 states and 1218 transitions. [2021-12-21 12:56:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:56:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) Word has length 158 [2021-12-21 12:56:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:04,338 INFO L225 Difference]: With dead ends: 769 [2021-12-21 12:56:04,339 INFO L226 Difference]: Without dead ends: 754 [2021-12-21 12:56:04,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:56:04,339 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 37 mSDsluCounter, 2856 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:04,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3824 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:56:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-21 12:56:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 752. [2021-12-21 12:56:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 608 states have (on average 1.6101973684210527) internal successors, (979), 631 states have internal predecessors, (979), 107 states have call successors, (107), 33 states have call predecessors, (107), 36 states have return successors, (110), 100 states have call predecessors, (110), 102 states have call successors, (110) [2021-12-21 12:56:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1196 transitions. [2021-12-21 12:56:04,369 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1196 transitions. Word has length 158 [2021-12-21 12:56:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:04,371 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1196 transitions. [2021-12-21 12:56:04,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-21 12:56:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1196 transitions. [2021-12-21 12:56:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-21 12:56:04,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:04,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:04,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:04,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:04,592 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -927691059, now seen corresponding path program 1 times [2021-12-21 12:56:04,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:04,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125635078] [2021-12-21 12:56:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:04,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:56:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:56:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 12:56:04,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:04,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125635078] [2021-12-21 12:56:04,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125635078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:04,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995760773] [2021-12-21 12:56:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:04,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:04,891 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:04,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 12:56:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:56:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:56:05,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995760773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:05,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:05,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:56:05,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401600745] [2021-12-21 12:56:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:05,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:56:05,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:56:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:56:05,300 INFO L87 Difference]: Start difference. First operand 752 states and 1196 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:05,341 INFO L93 Difference]: Finished difference Result 1478 states and 2362 transitions. [2021-12-21 12:56:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:56:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 169 [2021-12-21 12:56:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:05,354 INFO L225 Difference]: With dead ends: 1478 [2021-12-21 12:56:05,354 INFO L226 Difference]: Without dead ends: 721 [2021-12-21 12:56:05,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:05,357 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 11 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:05,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2859 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:56:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-21 12:56:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2021-12-21 12:56:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 580 states have (on average 1.6086206896551725) internal successors, (933), 601 states have internal predecessors, (933), 106 states have call successors, (106), 33 states have call predecessors, (106), 34 states have return successors, (107), 99 states have call predecessors, (107), 101 states have call successors, (107) [2021-12-21 12:56:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1146 transitions. [2021-12-21 12:56:05,378 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1146 transitions. Word has length 169 [2021-12-21 12:56:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:05,378 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1146 transitions. [2021-12-21 12:56:05,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1146 transitions. [2021-12-21 12:56:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-21 12:56:05,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:05,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:05,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:05,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:05,595 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 916203416, now seen corresponding path program 1 times [2021-12-21 12:56:05,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:05,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411318125] [2021-12-21 12:56:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:05,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:56:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 12:56:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:56:05,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411318125] [2021-12-21 12:56:05,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411318125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811768646] [2021-12-21 12:56:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:05,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:05,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:05,958 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:05,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 12:56:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:56:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:56:06,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811768646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:06,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:06,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2021-12-21 12:56:06,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239247178] [2021-12-21 12:56:06,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:56:06,380 INFO L87 Difference]: Start difference. First operand 721 states and 1146 transitions. Second operand has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 12:56:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:06,435 INFO L93 Difference]: Finished difference Result 1411 states and 2256 transitions. [2021-12-21 12:56:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:56:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) Word has length 171 [2021-12-21 12:56:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:06,451 INFO L225 Difference]: With dead ends: 1411 [2021-12-21 12:56:06,451 INFO L226 Difference]: Without dead ends: 721 [2021-12-21 12:56:06,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:56:06,453 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 143 mSDsluCounter, 4699 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5673 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:06,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5673 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:56:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-21 12:56:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 700. [2021-12-21 12:56:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 559 states have (on average 1.6082289803220036) internal successors, (899), 580 states have internal predecessors, (899), 106 states have call successors, (106), 33 states have call predecessors, (106), 34 states have return successors, (107), 99 states have call predecessors, (107), 101 states have call successors, (107) [2021-12-21 12:56:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1112 transitions. [2021-12-21 12:56:06,470 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1112 transitions. Word has length 171 [2021-12-21 12:56:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:06,470 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1112 transitions. [2021-12-21 12:56:06,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 12:56:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1112 transitions. [2021-12-21 12:56:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-21 12:56:06,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:06,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:06,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:06,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-21 12:56:06,686 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 844750643, now seen corresponding path program 1 times [2021-12-21 12:56:06,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402264518] [2021-12-21 12:56:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:06,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 12:56:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 12:56:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 12:56:06,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402264518] [2021-12-21 12:56:06,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402264518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746750747] [2021-12-21 12:56:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:06,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:06,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:06,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 12:56:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:56:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:56:07,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746750747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:07,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:07,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-21 12:56:07,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035093009] [2021-12-21 12:56:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:07,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:56:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:56:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:56:07,382 INFO L87 Difference]: Start difference. First operand 700 states and 1112 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:07,446 INFO L93 Difference]: Finished difference Result 1369 states and 2190 transitions. [2021-12-21 12:56:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:56:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2021-12-21 12:56:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:07,454 INFO L225 Difference]: With dead ends: 1369 [2021-12-21 12:56:07,454 INFO L226 Difference]: Without dead ends: 700 [2021-12-21 12:56:07,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:07,456 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 176 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:07,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2692 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:56:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-12-21 12:56:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2021-12-21 12:56:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 559 states have (on average 1.6064400715563507) internal successors, (898), 580 states have internal predecessors, (898), 106 states have call successors, (106), 33 states have call predecessors, (106), 34 states have return successors, (107), 99 states have call predecessors, (107), 101 states have call successors, (107) [2021-12-21 12:56:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1111 transitions. [2021-12-21 12:56:07,479 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1111 transitions. Word has length 173 [2021-12-21 12:56:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:07,479 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1111 transitions. [2021-12-21 12:56:07,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1111 transitions. [2021-12-21 12:56:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-21 12:56:07,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:07,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:07,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-21 12:56:07,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 12:56:07,700 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2129025857, now seen corresponding path program 1 times [2021-12-21 12:56:07,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211982050] [2021-12-21 12:56:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:07,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 12:56:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 12:56:07,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211982050] [2021-12-21 12:56:07,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211982050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:07,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:07,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:56:07,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989276361] [2021-12-21 12:56:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:07,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:07,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:56:07,984 INFO L87 Difference]: Start difference. First operand 700 states and 1111 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:11,795 INFO L93 Difference]: Finished difference Result 1634 states and 2655 transitions. [2021-12-21 12:56:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:56:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 174 [2021-12-21 12:56:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:11,800 INFO L225 Difference]: With dead ends: 1634 [2021-12-21 12:56:11,800 INFO L226 Difference]: Without dead ends: 951 [2021-12-21 12:56:11,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:56:11,802 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1936 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:11,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2024 Valid, 2326 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 12:56:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-12-21 12:56:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 660. [2021-12-21 12:56:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 522 states have (on average 1.5996168582375478) internal successors, (835), 541 states have internal predecessors, (835), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-12-21 12:56:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1044 transitions. [2021-12-21 12:56:11,850 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1044 transitions. Word has length 174 [2021-12-21 12:56:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:11,850 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1044 transitions. [2021-12-21 12:56:11,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1044 transitions. [2021-12-21 12:56:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-21 12:56:11,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:11,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:11,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 12:56:11,853 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1550207533, now seen corresponding path program 1 times [2021-12-21 12:56:11,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324534077] [2021-12-21 12:56:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:11,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:11,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 12:56:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:56:12,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324534077] [2021-12-21 12:56:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324534077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:12,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:12,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:56:12,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152464518] [2021-12-21 12:56:12,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:12,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:12,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:12,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:12,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:56:12,147 INFO L87 Difference]: Start difference. First operand 660 states and 1044 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:15,832 INFO L93 Difference]: Finished difference Result 1519 states and 2464 transitions. [2021-12-21 12:56:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:56:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2021-12-21 12:56:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:15,836 INFO L225 Difference]: With dead ends: 1519 [2021-12-21 12:56:15,837 INFO L226 Difference]: Without dead ends: 960 [2021-12-21 12:56:15,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:56:15,838 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 1506 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:15,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1594 Valid, 2407 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 12:56:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-12-21 12:56:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 660. [2021-12-21 12:56:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 522 states have (on average 1.5977011494252873) internal successors, (834), 541 states have internal predecessors, (834), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-12-21 12:56:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1043 transitions. [2021-12-21 12:56:15,888 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1043 transitions. Word has length 175 [2021-12-21 12:56:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1043 transitions. [2021-12-21 12:56:15,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1043 transitions. [2021-12-21 12:56:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-21 12:56:15,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:15,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:15,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 12:56:15,903 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1203303643, now seen corresponding path program 1 times [2021-12-21 12:56:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932840967] [2021-12-21 12:56:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:15,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 12:56:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-21 12:56:16,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932840967] [2021-12-21 12:56:16,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932840967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:16,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:16,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:56:16,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116803562] [2021-12-21 12:56:16,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:16,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:16,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:56:16,186 INFO L87 Difference]: Start difference. First operand 660 states and 1043 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:19,680 INFO L93 Difference]: Finished difference Result 1556 states and 2516 transitions. [2021-12-21 12:56:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 12:56:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 176 [2021-12-21 12:56:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:19,690 INFO L225 Difference]: With dead ends: 1556 [2021-12-21 12:56:19,690 INFO L226 Difference]: Without dead ends: 939 [2021-12-21 12:56:19,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:56:19,692 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1957 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:19,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2045 Valid, 2299 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 12:56:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-12-21 12:56:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 648. [2021-12-21 12:56:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 510 states have (on average 1.607843137254902) internal successors, (820), 529 states have internal predecessors, (820), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-12-21 12:56:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1029 transitions. [2021-12-21 12:56:19,746 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1029 transitions. Word has length 176 [2021-12-21 12:56:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1029 transitions. [2021-12-21 12:56:19,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1029 transitions. [2021-12-21 12:56:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-21 12:56:19,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:19,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:19,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 12:56:19,749 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1181984039, now seen corresponding path program 1 times [2021-12-21 12:56:19,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:19,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755711191] [2021-12-21 12:56:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:19,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 12:56:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:56:20,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755711191] [2021-12-21 12:56:20,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755711191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:20,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:20,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:56:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223644792] [2021-12-21 12:56:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:20,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:20,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:56:20,046 INFO L87 Difference]: Start difference. First operand 648 states and 1029 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:23,658 INFO L93 Difference]: Finished difference Result 1589 states and 2563 transitions. [2021-12-21 12:56:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:56:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 176 [2021-12-21 12:56:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:23,663 INFO L225 Difference]: With dead ends: 1589 [2021-12-21 12:56:23,663 INFO L226 Difference]: Without dead ends: 978 [2021-12-21 12:56:23,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:56:23,665 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 1995 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:23,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2083 Valid, 2326 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 12:56:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-21 12:56:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 652. [2021-12-21 12:56:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 514 states have (on average 1.6011673151750974) internal successors, (823), 533 states have internal predecessors, (823), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-12-21 12:56:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1032 transitions. [2021-12-21 12:56:23,723 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1032 transitions. Word has length 176 [2021-12-21 12:56:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:23,724 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1032 transitions. [2021-12-21 12:56:23,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 12:56:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1032 transitions. [2021-12-21 12:56:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-21 12:56:23,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:23,726 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:23,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 12:56:23,727 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1387706932, now seen corresponding path program 1 times [2021-12-21 12:56:23,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:23,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319285426] [2021-12-21 12:56:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:23,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:23,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 12:56:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:56:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 12:56:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 12:56:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 12:56:24,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319285426] [2021-12-21 12:56:24,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319285426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:56:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470128473] [2021-12-21 12:56:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:24,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:56:24,229 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:56:24,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 12:56:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 12:56:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:56:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 12:56:24,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:56:24,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470128473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:24,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:56:24,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2021-12-21 12:56:24,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966039311] [2021-12-21 12:56:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:24,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:56:24,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:24,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:56:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-12-21 12:56:24,799 INFO L87 Difference]: Start difference. First operand 652 states and 1032 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 12:56:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:56:26,824 INFO L93 Difference]: Finished difference Result 1926 states and 3141 transitions. [2021-12-21 12:56:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 12:56:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 177 [2021-12-21 12:56:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:56:26,830 INFO L225 Difference]: With dead ends: 1926 [2021-12-21 12:56:26,831 INFO L226 Difference]: Without dead ends: 1381 [2021-12-21 12:56:26,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-12-21 12:56:26,833 INFO L933 BasicCegarLoop]: 1072 mSDtfsCounter, 2250 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 3523 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2340 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 4057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 3523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 12:56:26,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2340 Valid, 2690 Invalid, 4057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 3523 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 12:56:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-12-21 12:56:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1292. [2021-12-21 12:56:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1010 states have (on average 1.621782178217822) internal successors, (1638), 1047 states have internal predecessors, (1638), 215 states have call successors, (215), 61 states have call predecessors, (215), 66 states have return successors, (241), 208 states have call predecessors, (241), 210 states have call successors, (241) [2021-12-21 12:56:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2094 transitions. [2021-12-21 12:56:26,943 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2094 transitions. Word has length 177 [2021-12-21 12:56:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:56:26,943 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2094 transitions. [2021-12-21 12:56:26,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 12:56:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2094 transitions. [2021-12-21 12:56:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-21 12:56:26,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:56:26,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:56:26,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-21 12:56:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:56:27,147 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:56:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:56:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash -877991015, now seen corresponding path program 1 times [2021-12-21 12:56:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:56:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550463469] [2021-12-21 12:56:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:56:27,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:56:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:56:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 12:56:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:56:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:56:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 12:56:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 12:56:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:56:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:56:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 12:56:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:56:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 12:56:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 12:56:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 12:56:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:56:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 12:56:27,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:56:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550463469] [2021-12-21 12:56:27,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550463469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:56:27,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:56:27,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 12:56:27,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396983331] [2021-12-21 12:56:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:56:27,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 12:56:27,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:56:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 12:56:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:56:27,528 INFO L87 Difference]: Start difference. First operand 1292 states and 2094 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19)