./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/recursive-simple/id_i25_o25-1.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 7214208e9cb45e87a457dfabd3017460791ae1b1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:32:35,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:32:35,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:32:35,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:32:35,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:32:35,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:32:35,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:32:35,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:32:35,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:32:35,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:32:35,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:32:35,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:32:35,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:32:35,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:32:35,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:32:35,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:32:35,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:32:35,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:32:35,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:32:35,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:32:35,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:32:35,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:32:35,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:32:35,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:32:35,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:32:35,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:32:35,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:32:35,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:32:35,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:32:35,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:32:35,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:32:35,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:32:35,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:32:35,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:32:35,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:32:35,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:32:35,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:32:35,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:32:35,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:32:35,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:32:35,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:32:35,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:32:35,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:32:35,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:32:35,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:32:35,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:32:35,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:32:35,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:32:35,739 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:32:35,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:32:35,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:32:35,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:32:35,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:32:35,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:32:35,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:32:35,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:32:35,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:32:35,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:32:35,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:32:35,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:32:35,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:32:35,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:32:35,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:32:35,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:32:35,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:35,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:32:35,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:32:35,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:32:35,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:32:35,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:32:35,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:32:35,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:32:35,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7214208e9cb45e87a457dfabd3017460791ae1b1 [2021-08-29 16:32:36,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:32:36,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:32:36,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:32:36,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:32:36,129 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:32:36,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-08-29 16:32:36,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ecbef85/d3a3db2b7a484da59bb21af70bf87d84/FLAGfbb048cd3 [2021-08-29 16:32:36,555 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:32:36,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-08-29 16:32:36,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ecbef85/d3a3db2b7a484da59bb21af70bf87d84/FLAGfbb048cd3 [2021-08-29 16:32:36,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ecbef85/d3a3db2b7a484da59bb21af70bf87d84 [2021-08-29 16:32:36,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:32:36,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:32:36,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:36,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:32:36,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:32:36,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:36" (1/1) ... [2021-08-29 16:32:37,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de029aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:36, skipping insertion in model container [2021-08-29 16:32:37,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:36" (1/1) ... [2021-08-29 16:32:37,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:32:37,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:32:37,141 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-08-29 16:32:37,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:37,151 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:32:37,162 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-08-29 16:32:37,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:37,176 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:32:37,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37 WrapperNode [2021-08-29 16:32:37,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:37,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:37,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:32:37,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:32:37,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:37,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:32:37,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:32:37,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:32:37,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:32:37,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:32:37,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:32:37,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:32:37,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (1/1) ... [2021-08-29 16:32:37,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:37,286 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) [2021-08-29 16:32:37,307 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 [2021-08-29 16:32:37,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:32:37,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:32:37,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:32:37,329 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-29 16:32:37,329 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-29 16:32:37,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:32:37,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:32:37,464 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:32:37,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:37 BoogieIcfgContainer [2021-08-29 16:32:37,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:32:37,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:32:37,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:32:37,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:32:37,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:32:36" (1/3) ... [2021-08-29 16:32:37,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46935979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:37, skipping insertion in model container [2021-08-29 16:32:37,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:37" (2/3) ... [2021-08-29 16:32:37,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46935979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:37, skipping insertion in model container [2021-08-29 16:32:37,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:37" (3/3) ... [2021-08-29 16:32:37,474 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2021-08-29 16:32:37,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:32:37,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:32:37,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:32:37,536 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:32:37,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:32:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:32:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:32:37,556 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:37,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:37,558 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-29 16:32:37,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:37,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103208046] [2021-08-29 16:32:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:37,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:37,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:32:37,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:37,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103208046] [2021-08-29 16:32:37,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103208046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:32:37,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:32:37,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:32:37,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160980413] [2021-08-29 16:32:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:32:37,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:32:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:37,906 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:38,003 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-29 16:32:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:32:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:32:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:38,015 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:32:38,015 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 16:32:38,018 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.76ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 16:32:38,025 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.59ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:38,027 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 52.59ms Time] [2021-08-29 16:32:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 16:32:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 16:32:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:32:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-29 16:32:38,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-29 16:32:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:38,064 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-29 16:32:38,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-29 16:32:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 16:32:38,065 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:38,066 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:38,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:32:38,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-29 16:32:38,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:38,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796525407] [2021-08-29 16:32:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:38,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:38,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:38,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:38,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:38,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796525407] [2021-08-29 16:32:38,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796525407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:38,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24228946] [2021-08-29 16:32:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:38,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:38,167 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) [2021-08-29 16:32:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:32:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:38,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:32:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:32:38,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24228946] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:38,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:38,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2021-08-29 16:32:38,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648027841] [2021-08-29 16:32:38,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 16:32:38,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 16:32:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-29 16:32:38,637 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:32:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:38,715 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 16:32:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 16:32:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-08-29 16:32:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:38,717 INFO L225 Difference]: With dead ends: 22 [2021-08-29 16:32:38,717 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 16:32:38,718 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.14ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:32:38,719 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.12ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:38,720 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 48.12ms Time] [2021-08-29 16:32:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 16:32:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-29 16:32:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:32:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-29 16:32:38,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-29 16:32:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-29 16:32:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:32:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-29 16:32:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 16:32:38,738 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:38,738 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:38,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:38,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:38,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-29 16:32:38,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:38,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628064289] [2021-08-29 16:32:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:38,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:32:39,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:39,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628064289] [2021-08-29 16:32:39,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628064289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:39,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386332102] [2021-08-29 16:32:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:32:39,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:39,083 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) [2021-08-29 16:32:39,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:32:39,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:32:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:32:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:32:39,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 16:32:39,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386332102] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:39,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:39,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2021-08-29 16:32:39,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037511429] [2021-08-29 16:32:39,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 16:32:39,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 16:32:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:32:39,524 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:32:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:39,606 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-29 16:32:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 16:32:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-08-29 16:32:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:39,607 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:32:39,607 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 16:32:39,607 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.34ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:32:39,608 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.62ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:39,609 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 78 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 56.62ms Time] [2021-08-29 16:32:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 16:32:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 16:32:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-29 16:32:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-29 16:32:39,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-29 16:32:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-29 16:32:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:32:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-29 16:32:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 16:32:39,614 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:39,615 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:39,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:39,832 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,SelfDestructingSolverStorable2 [2021-08-29 16:32:39,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-29 16:32:39,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:39,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849273074] [2021-08-29 16:32:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:39,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:39,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:39,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849273074] [2021-08-29 16:32:39,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849273074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:39,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860522439] [2021-08-29 16:32:39,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:32:39,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:39,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:39,989 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) [2021-08-29 16:32:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 16:32:40,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 16:32:40,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:40,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 16:32:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:40,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:32:40,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860522439] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:40,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:40,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2021-08-29 16:32:40,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276424888] [2021-08-29 16:32:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 16:32:40,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 16:32:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-29 16:32:40,598 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-29 16:32:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:40,680 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-08-29 16:32:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 16:32:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-08-29 16:32:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:40,682 INFO L225 Difference]: With dead ends: 28 [2021-08-29 16:32:40,682 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 16:32:40,682 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 99.57ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:32:40,683 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.58ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:40,683 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 82 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 50.58ms Time] [2021-08-29 16:32:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 16:32:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 16:32:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-29 16:32:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-29 16:32:40,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-08-29 16:32:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:40,688 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-29 16:32:40,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-29 16:32:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-29 16:32:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 16:32:40,690 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:40,690 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:40,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:40,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:40,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-08-29 16:32:40,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:40,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492334909] [2021-08-29 16:32:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:40,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:40,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:41,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:41,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:41,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:32:41,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:41,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492334909] [2021-08-29 16:32:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492334909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:41,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472201445] [2021-08-29 16:32:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:32:41,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:41,095 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) [2021-08-29 16:32:41,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 16:32:41,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:32:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 16:32:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:32:41,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-29 16:32:41,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472201445] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:41,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:41,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2021-08-29 16:32:41,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708861388] [2021-08-29 16:32:41,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-29 16:32:41,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-29 16:32:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-29 16:32:41,933 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:32:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:42,047 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-29 16:32:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:32:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-08-29 16:32:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:42,048 INFO L225 Difference]: With dead ends: 31 [2021-08-29 16:32:42,048 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 16:32:42,048 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 116.78ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-08-29 16:32:42,049 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.75ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:42,049 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 4 Invalid, 118 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 67.75ms Time] [2021-08-29 16:32:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 16:32:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 16:32:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-29 16:32:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-29 16:32:42,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-08-29 16:32:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:42,055 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-29 16:32:42,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:32:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-29 16:32:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-29 16:32:42,056 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:42,056 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:42,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-29 16:32:42,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:42,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-08-29 16:32:42,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:42,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696267570] [2021-08-29 16:32:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:42,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:32:42,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:42,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696267570] [2021-08-29 16:32:42,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696267570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:42,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850146708] [2021-08-29 16:32:42,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:32:42,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:42,446 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) [2021-08-29 16:32:42,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 16:32:42,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-29 16:32:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 16:32:42,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:32:42,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:32:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850146708] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:43,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:43,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2021-08-29 16:32:43,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408950981] [2021-08-29 16:32:43,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 16:32:43,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 16:32:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:32:43,615 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:32:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:43,741 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-29 16:32:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 16:32:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-08-29 16:32:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:43,742 INFO L225 Difference]: With dead ends: 34 [2021-08-29 16:32:43,742 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 16:32:43,743 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 143.84ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-08-29 16:32:43,744 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.22ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:43,744 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 4 Invalid, 126 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 69.22ms Time] [2021-08-29 16:32:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 16:32:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-29 16:32:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-08-29 16:32:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-29 16:32:43,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-08-29 16:32:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:43,749 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-29 16:32:43,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:32:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-29 16:32:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-29 16:32:43,750 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:43,750 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:43,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:43,973 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-08-29 16:32:43,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017162425] [2021-08-29 16:32:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:43,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:32:44,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:44,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017162425] [2021-08-29 16:32:44,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017162425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:44,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550150008] [2021-08-29 16:32:44,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:32:44,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:44,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:44,142 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) [2021-08-29 16:32:44,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 16:32:44,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-29 16:32:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 16:32:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:32:44,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-29 16:32:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550150008] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:45,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:45,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2021-08-29 16:32:45,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280775839] [2021-08-29 16:32:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 16:32:45,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 16:32:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-08-29 16:32:45,677 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-08-29 16:32:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:45,809 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-29 16:32:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 16:32:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-08-29 16:32:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:45,810 INFO L225 Difference]: With dead ends: 37 [2021-08-29 16:32:45,810 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 16:32:45,811 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 154.45ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-08-29 16:32:45,812 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 83 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.35ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:45,812 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 4 Invalid, 147 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [34 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 80.35ms Time] [2021-08-29 16:32:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 16:32:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-29 16:32:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-29 16:32:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-29 16:32:45,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-08-29 16:32:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:45,818 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-29 16:32:45,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-08-29 16:32:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-29 16:32:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-29 16:32:45,819 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:45,819 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:45,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:46,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:46,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-08-29 16:32:46,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:46,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074216196] [2021-08-29 16:32:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:46,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:32:46,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:46,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074216196] [2021-08-29 16:32:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074216196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:46,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205078179] [2021-08-29 16:32:46,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:32:46,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:46,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:46,246 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) [2021-08-29 16:32:46,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 16:32:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 16:32:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:32:46,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-29 16:32:48,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205078179] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:48,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:48,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2021-08-29 16:32:48,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012448758] [2021-08-29 16:32:48,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 16:32:48,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 16:32:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-08-29 16:32:48,122 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:32:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:48,256 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-29 16:32:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 16:32:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-08-29 16:32:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:48,259 INFO L225 Difference]: With dead ends: 40 [2021-08-29 16:32:48,260 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 16:32:48,260 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 174.19ms TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2021-08-29 16:32:48,262 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.20ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:48,262 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3 Invalid, 135 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 82.20ms Time] [2021-08-29 16:32:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 16:32:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-29 16:32:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-29 16:32:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-29 16:32:48,272 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-29 16:32:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-29 16:32:48,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:32:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-29 16:32:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-29 16:32:48,277 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:48,278 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:48,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:48,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:48,493 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-08-29 16:32:48,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:48,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279693140] [2021-08-29 16:32:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:48,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:32:48,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:48,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279693140] [2021-08-29 16:32:48,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279693140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:48,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963536388] [2021-08-29 16:32:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:32:48,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:48,696 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) [2021-08-29 16:32:48,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 16:32:48,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:32:48,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:48,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 16:32:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:32:48,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-29 16:32:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963536388] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:51,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2021-08-29 16:32:51,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671861689] [2021-08-29 16:32:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 16:32:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 16:32:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-29 16:32:51,160 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:32:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:51,351 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-29 16:32:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 16:32:51,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-08-29 16:32:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:51,355 INFO L225 Difference]: With dead ends: 43 [2021-08-29 16:32:51,355 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 16:32:51,356 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 207.09ms TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2021-08-29 16:32:51,357 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.98ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:51,358 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 3 Invalid, 152 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 116.98ms Time] [2021-08-29 16:32:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 16:32:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-29 16:32:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-08-29 16:32:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-29 16:32:51,367 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-08-29 16:32:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:51,368 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-29 16:32:51,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:32:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-29 16:32:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-29 16:32:51,373 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:51,373 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:51,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:51,576 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,SelfDestructingSolverStorable8 [2021-08-29 16:32:51,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-08-29 16:32:51,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:51,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023436899] [2021-08-29 16:32:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:51,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:32:51,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:51,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023436899] [2021-08-29 16:32:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023436899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:51,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599478968] [2021-08-29 16:32:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:32:51,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:51,805 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) [2021-08-29 16:32:51,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 16:32:51,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-29 16:32:51,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-29 16:32:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:32:52,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-29 16:32:54,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599478968] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:54,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:54,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 27 [2021-08-29 16:32:54,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136056537] [2021-08-29 16:32:54,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-29 16:32:54,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-29 16:32:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-08-29 16:32:54,868 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-08-29 16:32:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:55,034 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-29 16:32:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 16:32:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2021-08-29 16:32:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:55,035 INFO L225 Difference]: With dead ends: 46 [2021-08-29 16:32:55,035 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 16:32:55,036 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 226.90ms TimeCoverageRelationStatistics Valid=434, Invalid=898, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 16:32:55,037 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 136 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.45ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:55,037 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 3 Invalid, 198 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [58 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 96.45ms Time] [2021-08-29 16:32:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 16:32:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-29 16:32:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-29 16:32:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-29 16:32:55,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-08-29 16:32:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:55,042 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-29 16:32:55,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-08-29 16:32:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-29 16:32:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-29 16:32:55,043 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:55,043 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:55,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 16:32:55,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-08-29 16:32:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:55,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365523280] [2021-08-29 16:32:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:55,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-29 16:32:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:55,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365523280] [2021-08-29 16:32:55,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365523280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:55,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609465911] [2021-08-29 16:32:55,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:32:55,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:55,505 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) [2021-08-29 16:32:55,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 16:32:55,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:32:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:32:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-29 16:32:55,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-29 16:32:55,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-29 16:32:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609465911] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:59,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 29 [2021-08-29 16:32:59,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532344846] [2021-08-29 16:32:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-29 16:32:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-29 16:32:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-08-29 16:32:59,458 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-08-29 16:32:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:59,638 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-29 16:32:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 16:32:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2021-08-29 16:32:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:59,639 INFO L225 Difference]: With dead ends: 49 [2021-08-29 16:32:59,639 INFO L226 Difference]: Without dead ends: 45 [2021-08-29 16:32:59,640 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 257.83ms TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2021-08-29 16:32:59,641 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.03ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:59,641 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 4 Invalid, 188 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [26 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 97.03ms Time] [2021-08-29 16:32:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-29 16:32:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-29 16:32:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-08-29 16:32:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-29 16:32:59,646 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-08-29 16:32:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:59,647 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-29 16:32:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-08-29 16:32:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-29 16:32:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-29 16:32:59,649 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:59,649 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:59,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:59,852 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,SelfDestructingSolverStorable10 [2021-08-29 16:32:59,853 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-08-29 16:32:59,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:59,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762425854] [2021-08-29 16:32:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:59,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-29 16:33:00,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:00,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762425854] [2021-08-29 16:33:00,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762425854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:00,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122241428] [2021-08-29 16:33:00,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:33:00,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:00,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:00,097 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) [2021-08-29 16:33:00,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 16:33:00,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-29 16:33:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 16:33:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-29 16:33:00,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-29 16:33:04,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122241428] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:04,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:04,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 31 [2021-08-29 16:33:04,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83071635] [2021-08-29 16:33:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-29 16:33:04,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-29 16:33:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-08-29 16:33:04,963 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-08-29 16:33:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:05,194 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-08-29 16:33:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 16:33:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2021-08-29 16:33:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:05,195 INFO L225 Difference]: With dead ends: 52 [2021-08-29 16:33:05,195 INFO L226 Difference]: Without dead ends: 48 [2021-08-29 16:33:05,196 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 290.04ms TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2021-08-29 16:33:05,196 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 213 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.12ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:05,197 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 3 Invalid, 283 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [96 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 135.12ms Time] [2021-08-29 16:33:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-29 16:33:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-29 16:33:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-08-29 16:33:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-29 16:33:05,203 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-08-29 16:33:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:05,203 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-29 16:33:05,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-08-29 16:33:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-29 16:33:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-29 16:33:05,205 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:05,205 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:05,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:05,419 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,SelfDestructingSolverStorable11 [2021-08-29 16:33:05,419 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-08-29 16:33:05,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:05,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619288113] [2021-08-29 16:33:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:05,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-29 16:33:05,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:05,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619288113] [2021-08-29 16:33:05,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619288113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:05,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258333704] [2021-08-29 16:33:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:33:05,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:05,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:05,725 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) [2021-08-29 16:33:05,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-29 16:33:06,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-29 16:33:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 16:33:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-29 16:33:06,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-29 16:33:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258333704] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:11,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:11,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 33 [2021-08-29 16:33:11,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948226233] [2021-08-29 16:33:11,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-29 16:33:11,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-29 16:33:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 16:33:11,739 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-08-29 16:33:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:11,940 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-08-29 16:33:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 16:33:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2021-08-29 16:33:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:11,942 INFO L225 Difference]: With dead ends: 55 [2021-08-29 16:33:11,942 INFO L226 Difference]: Without dead ends: 51 [2021-08-29 16:33:11,943 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 323.02ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-08-29 16:33:11,943 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.92ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:11,944 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 4 Invalid, 195 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 99.92ms Time] [2021-08-29 16:33:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-29 16:33:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-29 16:33:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-08-29 16:33:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-08-29 16:33:11,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-08-29 16:33:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:11,949 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-08-29 16:33:11,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-08-29 16:33:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-08-29 16:33:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-29 16:33:11,950 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:11,950 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:11,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:12,166 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,SelfDestructingSolverStorable12 [2021-08-29 16:33:12,166 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:12,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-08-29 16:33:12,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:12,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990687541] [2021-08-29 16:33:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:12,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-29 16:33:12,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990687541] [2021-08-29 16:33:12,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990687541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755750927] [2021-08-29 16:33:12,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:33:12,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:12,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:12,504 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) [2021-08-29 16:33:12,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-29 16:33:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:12,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-29 16:33:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-29 16:33:13,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-29 16:33:19,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755750927] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:19,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:19,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 35 [2021-08-29 16:33:19,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454677500] [2021-08-29 16:33:19,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-29 16:33:19,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-29 16:33:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 16:33:19,932 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-08-29 16:33:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:20,122 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-08-29 16:33:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 16:33:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2021-08-29 16:33:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:20,124 INFO L225 Difference]: With dead ends: 58 [2021-08-29 16:33:20,124 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 16:33:20,124 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 379.04ms TimeCoverageRelationStatistics Valid=770, Invalid=1582, Unknown=0, NotChecked=0, Total=2352 [2021-08-29 16:33:20,125 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.46ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:20,125 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 4 Invalid, 233 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [18 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 98.46ms Time] [2021-08-29 16:33:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 16:33:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-29 16:33:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-08-29 16:33:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-29 16:33:20,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-08-29 16:33:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:20,130 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-29 16:33:20,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-08-29 16:33:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-29 16:33:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-29 16:33:20,131 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:20,132 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:20,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:20,341 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,SelfDestructingSolverStorable13 [2021-08-29 16:33:20,341 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:20,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-08-29 16:33:20,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:20,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261907204] [2021-08-29 16:33:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:20,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-29 16:33:20,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:20,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261907204] [2021-08-29 16:33:20,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261907204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:20,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57125525] [2021-08-29 16:33:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:33:20,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:20,673 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) [2021-08-29 16:33:20,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-29 16:33:21,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:33:21,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-29 16:33:21,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-29 16:33:21,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-08-29 16:33:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57125525] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:29,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:29,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 37 [2021-08-29 16:33:29,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33642843] [2021-08-29 16:33:29,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-29 16:33:29,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-29 16:33:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 16:33:29,573 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-08-29 16:33:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:29,800 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-29 16:33:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 16:33:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2021-08-29 16:33:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:29,801 INFO L225 Difference]: With dead ends: 61 [2021-08-29 16:33:29,802 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 16:33:29,802 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 381.64ms TimeCoverageRelationStatistics Valid=869, Invalid=1783, Unknown=0, NotChecked=0, Total=2652 [2021-08-29 16:33:29,803 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.84ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:29,803 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 3 Invalid, 230 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [22 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 115.84ms Time] [2021-08-29 16:33:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 16:33:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-29 16:33:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-08-29 16:33:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-29 16:33:29,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-08-29 16:33:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:29,807 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-29 16:33:29,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-08-29 16:33:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-29 16:33:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-29 16:33:29,808 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:29,808 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:29,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:30,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:30,021 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-08-29 16:33:30,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:30,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383657322] [2021-08-29 16:33:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:30,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-29 16:33:30,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:30,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383657322] [2021-08-29 16:33:30,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383657322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:30,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526525294] [2021-08-29 16:33:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:33:30,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:30,359 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) [2021-08-29 16:33:30,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-29 16:33:31,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-29 16:33:31,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-29 16:33:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-29 16:33:31,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-29 16:33:41,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526525294] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:41,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:41,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 39 [2021-08-29 16:33:41,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100745681] [2021-08-29 16:33:41,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-29 16:33:41,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-29 16:33:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2021-08-29 16:33:41,110 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-08-29 16:33:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:41,376 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-29 16:33:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 16:33:41,377 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2021-08-29 16:33:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:41,377 INFO L225 Difference]: With dead ends: 64 [2021-08-29 16:33:41,377 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 16:33:41,378 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 428.58ms TimeCoverageRelationStatistics Valid=974, Invalid=1996, Unknown=0, NotChecked=0, Total=2970 [2021-08-29 16:33:41,379 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 406 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.78ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:41,379 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 4 Invalid, 411 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [190 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 146.78ms Time] [2021-08-29 16:33:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 16:33:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-29 16:33:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-08-29 16:33:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-29 16:33:41,383 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-08-29 16:33:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-29 16:33:41,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-08-29 16:33:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-29 16:33:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-29 16:33:41,385 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:41,385 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:41,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-29 16:33:41,593 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,SelfDestructingSolverStorable15 [2021-08-29 16:33:41,593 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-08-29 16:33:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:41,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825981878] [2021-08-29 16:33:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:41,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-29 16:33:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825981878] [2021-08-29 16:33:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825981878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:41,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230751356] [2021-08-29 16:33:41,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:33:41,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:41,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:41,977 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) [2021-08-29 16:33:41,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-29 16:33:42,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:33:42,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-29 16:33:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-29 16:33:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-08-29 16:33:55,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230751356] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:55,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:55,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 41 [2021-08-29 16:33:55,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907004097] [2021-08-29 16:33:55,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-29 16:33:55,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-29 16:33:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2021-08-29 16:33:55,021 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-08-29 16:33:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:55,277 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-08-29 16:33:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 16:33:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2021-08-29 16:33:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:55,278 INFO L225 Difference]: With dead ends: 67 [2021-08-29 16:33:55,278 INFO L226 Difference]: Without dead ends: 63 [2021-08-29 16:33:55,279 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 447.58ms TimeCoverageRelationStatistics Valid=1085, Invalid=2221, Unknown=0, NotChecked=0, Total=3306 [2021-08-29 16:33:55,280 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 222 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.28ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:55,280 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 3 Invalid, 313 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [97 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 128.28ms Time] [2021-08-29 16:33:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-29 16:33:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-29 16:33:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-08-29 16:33:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-29 16:33:55,285 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-08-29 16:33:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:55,286 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-29 16:33:55,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-08-29 16:33:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-29 16:33:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-29 16:33:55,287 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:55,287 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:55,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-29 16:33:55,522 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,SelfDestructingSolverStorable16 [2021-08-29 16:33:55,522 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-08-29 16:33:55,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:55,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267150336] [2021-08-29 16:33:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:55,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-29 16:33:56,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:56,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267150336] [2021-08-29 16:33:56,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267150336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:56,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716322411] [2021-08-29 16:33:56,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:33:56,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:56,099 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) [2021-08-29 16:33:56,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-29 16:33:57,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-29 16:33:57,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-29 16:33:57,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-29 16:33:57,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-29 16:34:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716322411] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:11,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:11,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 43 [2021-08-29 16:34:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520688643] [2021-08-29 16:34:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-29 16:34:11,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-29 16:34:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2021-08-29 16:34:11,595 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-08-29 16:34:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:11,847 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-08-29 16:34:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 16:34:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2021-08-29 16:34:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:11,849 INFO L225 Difference]: With dead ends: 70 [2021-08-29 16:34:11,849 INFO L226 Difference]: Without dead ends: 66 [2021-08-29 16:34:11,850 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 512.11ms TimeCoverageRelationStatistics Valid=1202, Invalid=2458, Unknown=0, NotChecked=0, Total=3660 [2021-08-29 16:34:11,850 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 157 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.17ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:11,850 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 3 Invalid, 321 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 123.17ms Time] [2021-08-29 16:34:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-29 16:34:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-29 16:34:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-08-29 16:34:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-08-29 16:34:11,856 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-08-29 16:34:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-08-29 16:34:11,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-08-29 16:34:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-08-29 16:34:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-29 16:34:11,857 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:11,857 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:11,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-29 16:34:12,069 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,SelfDestructingSolverStorable17 [2021-08-29 16:34:12,069 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-08-29 16:34:12,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:12,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009840610] [2021-08-29 16:34:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:12,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-29 16:34:12,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009840610] [2021-08-29 16:34:12,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009840610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:12,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039041095] [2021-08-29 16:34:12,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:34:12,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:12,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:12,525 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) [2021-08-29 16:34:12,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-29 16:34:14,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-29 16:34:14,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-29 16:34:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-29 16:34:14,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-08-29 16:34:31,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039041095] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:31,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:31,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 45 [2021-08-29 16:34:31,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698818621] [2021-08-29 16:34:31,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-29 16:34:31,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-29 16:34:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2021-08-29 16:34:31,293 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-08-29 16:34:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:31,584 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-08-29 16:34:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-29 16:34:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2021-08-29 16:34:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:31,585 INFO L225 Difference]: With dead ends: 73 [2021-08-29 16:34:31,585 INFO L226 Difference]: Without dead ends: 69 [2021-08-29 16:34:31,586 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 526.89ms TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2021-08-29 16:34:31,587 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 122 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.88ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:31,587 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4 Invalid, 312 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [42 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 139.88ms Time] [2021-08-29 16:34:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-29 16:34:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-29 16:34:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-08-29 16:34:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-08-29 16:34:31,591 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-08-29 16:34:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:31,591 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-08-29 16:34:31,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-08-29 16:34:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-08-29 16:34:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-29 16:34:31,593 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:31,593 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:31,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-29 16:34:31,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:31,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-08-29 16:34:31,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:31,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923626725] [2021-08-29 16:34:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:31,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:31,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-29 16:34:32,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:32,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923626725] [2021-08-29 16:34:32,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923626725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:32,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073433162] [2021-08-29 16:34:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:34:32,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:32,313 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) [2021-08-29 16:34:32,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-29 16:34:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:33,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-29 16:34:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-29 16:34:34,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:34:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-29 16:34:54,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073433162] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:34:54,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:34:54,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 47 [2021-08-29 16:34:54,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547943217] [2021-08-29 16:34:54,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-29 16:34:54,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-29 16:34:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2021-08-29 16:34:54,018 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2021-08-29 16:34:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:54,429 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-08-29 16:34:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-29 16:34:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) Word has length 124 [2021-08-29 16:34:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:54,430 INFO L225 Difference]: With dead ends: 76 [2021-08-29 16:34:54,430 INFO L226 Difference]: Without dead ends: 72 [2021-08-29 16:34:54,431 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 570.30ms TimeCoverageRelationStatistics Valid=1454, Invalid=2968, Unknown=0, NotChecked=0, Total=4422 [2021-08-29 16:34:54,432 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 874 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.54ms SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.97ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:54,432 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 3 Invalid, 683 Unknown, 0 Unchecked, 2.54ms Time], IncrementalHoareTripleChecker [424 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 238.97ms Time] [2021-08-29 16:34:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-29 16:34:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-29 16:34:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-08-29 16:34:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-08-29 16:34:54,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-08-29 16:34:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:54,436 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-08-29 16:34:54,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2021-08-29 16:34:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-08-29 16:34:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-29 16:34:54,437 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:54,437 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:54,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-29 16:34:54,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:54,645 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:34:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:54,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-08-29 16:34:54,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:54,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863153003] [2021-08-29 16:34:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:54,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:54,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-08-29 16:34:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:55,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863153003] [2021-08-29 16:34:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863153003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:34:55,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627302223] [2021-08-29 16:34:55,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:34:55,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:34:55,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:55,237 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) [2021-08-29 16:34:55,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-29 16:34:57,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:34:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:34:57,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 16:34:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:34:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-08-29 16:34:57,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-08-29 16:35:20,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627302223] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:20,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:20,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 49 [2021-08-29 16:35:20,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284343171] [2021-08-29 16:35:20,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-29 16:35:20,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-29 16:35:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2021-08-29 16:35:20,832 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2021-08-29 16:35:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:21,325 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-08-29 16:35:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-29 16:35:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) Word has length 130 [2021-08-29 16:35:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:21,335 INFO L225 Difference]: With dead ends: 79 [2021-08-29 16:35:21,335 INFO L226 Difference]: Without dead ends: 75 [2021-08-29 16:35:21,337 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 638.51ms TimeCoverageRelationStatistics Valid=1589, Invalid=3241, Unknown=0, NotChecked=0, Total=4830 [2021-08-29 16:35:21,338 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 999 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 290.53ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:21,339 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 4 Invalid, 775 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [489 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 290.53ms Time] [2021-08-29 16:35:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-29 16:35:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-29 16:35:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-08-29 16:35:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-08-29 16:35:21,350 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-08-29 16:35:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:21,350 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-08-29 16:35:21,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2021-08-29 16:35:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-08-29 16:35:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-29 16:35:21,352 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:21,352 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:35:21,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:21,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-29 16:35:21,577 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:35:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-08-29 16:35:21,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:21,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197246866] [2021-08-29 16:35:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:21,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:21,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-08-29 16:35:22,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:22,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197246866] [2021-08-29 16:35:22,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197246866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:22,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178226342] [2021-08-29 16:35:22,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:35:22,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:22,169 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) [2021-08-29 16:35:22,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-29 16:35:24,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-29 16:35:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:35:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-29 16:35:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-08-29 16:35:24,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-29 16:35:51,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178226342] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:51,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:51,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 51 [2021-08-29 16:35:51,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588318080] [2021-08-29 16:35:51,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-29 16:35:51,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-29 16:35:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1877, Unknown=0, NotChecked=0, Total=2550 [2021-08-29 16:35:51,890 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2021-08-29 16:35:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:52,302 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-08-29 16:35:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-29 16:35:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) Word has length 136 [2021-08-29 16:35:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:52,304 INFO L225 Difference]: With dead ends: 82 [2021-08-29 16:35:52,305 INFO L226 Difference]: Without dead ends: 78 [2021-08-29 16:35:52,308 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 663.00ms TimeCoverageRelationStatistics Valid=1730, Invalid=3526, Unknown=0, NotChecked=0, Total=5256 [2021-08-29 16:35:52,309 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 507 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.12ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:52,309 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 3 Invalid, 532 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [235 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 220.12ms Time] [2021-08-29 16:35:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-29 16:35:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-29 16:35:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-08-29 16:35:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-08-29 16:35:52,316 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-08-29 16:35:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:52,317 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-08-29 16:35:52,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2021-08-29 16:35:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-08-29 16:35:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-29 16:35:52,319 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:52,319 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:35:52,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:52,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-29 16:35:52,545 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:35:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-08-29 16:35:52,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:52,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362620931] [2021-08-29 16:35:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:52,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-08-29 16:35:53,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362620931] [2021-08-29 16:35:53,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362620931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388503541] [2021-08-29 16:35:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:35:53,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:53,257 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) [2021-08-29 16:35:53,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-29 16:35:55,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:35:55,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:35:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-29 16:35:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-08-29 16:35:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:36:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-08-29 16:36:27,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388503541] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:36:27,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:36:27,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 49] total 53 [2021-08-29 16:36:27,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673299465] [2021-08-29 16:36:27,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-29 16:36:27,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:36:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-29 16:36:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 16:36:27,838 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2021-08-29 16:36:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:36:28,236 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-08-29 16:36:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-29 16:36:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) Word has length 142 [2021-08-29 16:36:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:36:28,237 INFO L225 Difference]: With dead ends: 85 [2021-08-29 16:36:28,237 INFO L226 Difference]: Without dead ends: 81 [2021-08-29 16:36:28,238 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 733.23ms TimeCoverageRelationStatistics Valid=1877, Invalid=3823, Unknown=0, NotChecked=0, Total=5700 [2021-08-29 16:36:28,241 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 383 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.64ms IncrementalHoareTripleChecker+Time [2021-08-29 16:36:28,242 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 4 Invalid, 477 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [172 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 195.64ms Time] [2021-08-29 16:36:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-29 16:36:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-29 16:36:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-08-29 16:36:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-08-29 16:36:28,248 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-08-29 16:36:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:36:28,249 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-08-29 16:36:28,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2021-08-29 16:36:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-08-29 16:36:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-29 16:36:28,250 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:36:28,250 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:36:28,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-29 16:36:28,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:36:28,461 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:36:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:36:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-08-29 16:36:28,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:36:28,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320151656] [2021-08-29 16:36:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:36:28,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:36:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:36:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:36:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-08-29 16:36:29,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:36:29,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320151656] [2021-08-29 16:36:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320151656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:36:29,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710070217] [2021-08-29 16:36:29,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:36:29,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:36:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:36:29,185 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) [2021-08-29 16:36:29,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-29 16:36:32,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-29 16:36:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:36:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-29 16:36:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:36:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-08-29 16:36:32,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:37:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-29 16:37:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710070217] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:37:08,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:37:08,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 55 [2021-08-29 16:37:08,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199414748] [2021-08-29 16:37:08,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-29 16:37:08,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:37:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-29 16:37:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2021-08-29 16:37:08,865 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2021-08-29 16:37:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:37:09,317 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-08-29 16:37:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-29 16:37:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) Word has length 148 [2021-08-29 16:37:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:37:09,318 INFO L225 Difference]: With dead ends: 88 [2021-08-29 16:37:09,318 INFO L226 Difference]: Without dead ends: 84 [2021-08-29 16:37:09,319 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 784.79ms TimeCoverageRelationStatistics Valid=2030, Invalid=4132, Unknown=0, NotChecked=0, Total=6162 [2021-08-29 16:37:09,320 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 300 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.11ms IncrementalHoareTripleChecker+Time [2021-08-29 16:37:09,320 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 4 Invalid, 447 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [126 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 201.11ms Time] [2021-08-29 16:37:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-29 16:37:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-29 16:37:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-08-29 16:37:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-08-29 16:37:09,323 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-08-29 16:37:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:37:09,324 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-08-29 16:37:09,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2021-08-29 16:37:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-08-29 16:37:09,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-29 16:37:09,325 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:37:09,325 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:37:09,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-29 16:37:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:37:09,537 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:37:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:37:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-08-29 16:37:09,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:37:09,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019027542] [2021-08-29 16:37:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:37:09,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:37:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:09,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-08-29 16:37:10,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:37:10,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019027542] [2021-08-29 16:37:10,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019027542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:37:10,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469214125] [2021-08-29 16:37:10,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:37:10,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:37:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:37:10,296 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) [2021-08-29 16:37:10,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-29 16:37:13,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-08-29 16:37:13,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:37:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-29 16:37:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:37:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-08-29 16:37:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:37:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-08-29 16:37:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469214125] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:37:55,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:37:55,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 53] total 56 [2021-08-29 16:37:55,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897519895] [2021-08-29 16:37:55,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-29 16:37:55,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:37:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-29 16:37:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2245, Unknown=0, NotChecked=0, Total=3080 [2021-08-29 16:37:55,027 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2021-08-29 16:37:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:37:55,443 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-08-29 16:37:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-29 16:37:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) Word has length 154 [2021-08-29 16:37:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:37:55,444 INFO L225 Difference]: With dead ends: 91 [2021-08-29 16:37:55,445 INFO L226 Difference]: Without dead ends: 87 [2021-08-29 16:37:55,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 812.64ms TimeCoverageRelationStatistics Valid=2186, Invalid=4294, Unknown=0, NotChecked=0, Total=6480 [2021-08-29 16:37:55,446 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 159 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.47ms IncrementalHoareTripleChecker+Time [2021-08-29 16:37:55,446 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 3 Invalid, 373 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [55 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 169.47ms Time] [2021-08-29 16:37:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-29 16:37:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-08-29 16:37:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-08-29 16:37:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-08-29 16:37:55,450 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-08-29 16:37:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:37:55,450 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-08-29 16:37:55,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2021-08-29 16:37:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-08-29 16:37:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-29 16:37:55,452 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:37:55,452 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:37:55,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-29 16:37:55,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-29 16:37:55,661 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:37:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:37:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-08-29 16:37:55,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:37:55,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868787119] [2021-08-29 16:37:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:37:55,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:37:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:55,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:37:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:37:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-08-29 16:37:57,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:37:57,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868787119] [2021-08-29 16:37:57,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868787119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:37:57,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876046870] [2021-08-29 16:37:57,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:37:57,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:37:57,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:37:57,887 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) [2021-08-29 16:37:57,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-29 16:38:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-29 16:38:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:38:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-08-29 16:38:02,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:38:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-08-29 16:38:06,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876046870] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:38:06,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:38:06,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 55 [2021-08-29 16:38:06,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749333575] [2021-08-29 16:38:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-29 16:38:06,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:38:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-29 16:38:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-08-29 16:38:06,065 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-08-29 16:38:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:38:07,312 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-08-29 16:38:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-29 16:38:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2021-08-29 16:38:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:38:07,313 INFO L225 Difference]: With dead ends: 94 [2021-08-29 16:38:07,313 INFO L226 Difference]: Without dead ends: 90 [2021-08-29 16:38:07,314 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 367 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1279.84ms TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-08-29 16:38:07,314 INFO L928 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 3759 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 962.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1213.72ms IncrementalHoareTripleChecker+Time [2021-08-29 16:38:07,315 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 916 Invalid, 3759 Unknown, 0 Unchecked, 12.57ms Time], IncrementalHoareTripleChecker [0 Valid, 3759 Invalid, 0 Unknown, 0 Unchecked, 1213.72ms Time] [2021-08-29 16:38:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-29 16:38:07,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-29 16:38:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-08-29 16:38:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-08-29 16:38:07,318 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-08-29 16:38:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:38:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-08-29 16:38:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-08-29 16:38:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-08-29 16:38:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-29 16:38:07,320 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:38:07,320 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:38:07,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-29 16:38:07,524 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,SelfDestructingSolverStorable25 [2021-08-29 16:38:07,525 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:38:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:38:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-08-29 16:38:07,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:38:07,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115509986] [2021-08-29 16:38:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:38:07,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:38:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:07,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:38:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:38:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-08-29 16:38:08,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:38:08,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115509986] [2021-08-29 16:38:08,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115509986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:38:08,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086017642] [2021-08-29 16:38:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:38:08,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:38:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:38:08,508 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) [2021-08-29 16:38:08,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-29 16:38:12,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:38:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:38:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-29 16:38:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:38:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-08-29 16:38:13,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 16:38:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086017642] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:38:13,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 16:38:13,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2021-08-29 16:38:13,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672332475] [2021-08-29 16:38:13,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-29 16:38:13,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:38:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-29 16:38:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 16:38:13,062 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-08-29 16:38:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:38:13,571 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-08-29 16:38:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-29 16:38:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 166 [2021-08-29 16:38:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:38:13,572 INFO L225 Difference]: With dead ends: 90 [2021-08-29 16:38:13,572 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 16:38:13,573 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 677.90ms TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2021-08-29 16:38:13,573 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.25ms IncrementalHoareTripleChecker+Time [2021-08-29 16:38:13,574 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3 Invalid, 411 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 165.25ms Time] [2021-08-29 16:38:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 16:38:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 16:38:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 16:38:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 16:38:13,575 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2021-08-29 16:38:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:38:13,575 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 16:38:13,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-08-29 16:38:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 16:38:13,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 16:38:13,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:38:13,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-29 16:38:13,784 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,SelfDestructingSolverStorable26 [2021-08-29 16:38:13,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 16:38:13,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:38:13,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:38:13,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:38:13,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:38:13,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:38:13,806 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 16:38:13,806 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 16:38:13,806 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 16:38:13,806 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 25 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 25)) [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-08-29 16:38:13,807 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-08-29 16:38:13,808 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-08-29 16:38:13,808 INFO L854 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-08-29 16:38:13,808 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-08-29 16:38:13,808 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-29 16:38:13,808 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-08-29 16:38:13,811 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:38:13,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:38:13 BoogieIcfgContainer [2021-08-29 16:38:13,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:38:13,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:38:13,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:38:13,815 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:38:13,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:37" (3/4) ... [2021-08-29 16:38:13,817 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 16:38:13,822 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-08-29 16:38:13,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-29 16:38:13,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 16:38:13,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:38:13,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:38:13,849 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:38:13,850 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:38:13,850 INFO L158 Benchmark]: Toolchain (without parser) took 336857.62ms. Allocated memory was 58.7MB in the beginning and 629.1MB in the end (delta: 570.4MB). Free memory was 37.8MB in the beginning and 214.8MB in the end (delta: -177.0MB). Peak memory consumption was 390.6MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,850 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 41.0MB in the beginning and 40.9MB in the end (delta: 51.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:38:13,850 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.83ms. Allocated memory is still 58.7MB. Free memory was 37.6MB in the beginning and 28.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,851 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.20ms. Allocated memory is still 58.7MB. Free memory was 28.5MB in the beginning and 42.5MB in the end (delta: -14.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,852 INFO L158 Benchmark]: Boogie Preprocessor took 19.29ms. Allocated memory is still 58.7MB. Free memory was 42.5MB in the beginning and 41.6MB in the end (delta: 872.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:38:13,852 INFO L158 Benchmark]: RCFGBuilder took 210.43ms. Allocated memory is still 58.7MB. Free memory was 41.6MB in the beginning and 33.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,856 INFO L158 Benchmark]: TraceAbstraction took 336345.66ms. Allocated memory was 58.7MB in the beginning and 629.1MB in the end (delta: 570.4MB). Free memory was 33.1MB in the beginning and 216.9MB in the end (delta: -183.8MB). Peak memory consumption was 387.7MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,856 INFO L158 Benchmark]: Witness Printer took 35.20ms. Allocated memory is still 629.1MB. Free memory was 216.9MB in the beginning and 214.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:38:13,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 41.0MB in the beginning and 40.9MB in the end (delta: 51.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.83ms. Allocated memory is still 58.7MB. Free memory was 37.6MB in the beginning and 28.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.20ms. Allocated memory is still 58.7MB. Free memory was 28.5MB in the beginning and 42.5MB in the end (delta: -14.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.29ms. Allocated memory is still 58.7MB. Free memory was 42.5MB in the beginning and 41.6MB in the end (delta: 872.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 210.43ms. Allocated memory is still 58.7MB. Free memory was 41.6MB in the beginning and 33.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 336345.66ms. Allocated memory was 58.7MB in the beginning and 629.1MB in the end (delta: 570.4MB). Free memory was 33.1MB in the beginning and 216.9MB in the end (delta: -183.8MB). Peak memory consumption was 387.7MB. Max. memory is 16.1GB. * Witness Printer took 35.20ms. Allocated memory is still 629.1MB. Free memory was 216.9MB in the beginning and 214.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 336285.07ms, OverallIterations: 27, TraceHistogramMax: 27, EmptinessCheckTime: 43.56ms, AutomataDifference: 7857.76ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 20.70ms, InitialAbstractionConstructionTime: 11.11ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5417 SdHoareTripleChecker+Valid, 4500.12ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5041 mSDsluCounter, 1007 SdHoareTripleChecker+Invalid, 3627.84ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5488 mSDsCounter, 2216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8879 IncrementalHoareTripleChecker+Invalid, 11095 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2216 mSolverCounterUnsat, 81 mSDtfsCounter, 8879 mSolverCounterSat, 58.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6108 GetRequests, 4895 SyntacticMatches, 7 SemanticMatches, 1206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17245 ImplicationChecksByTransitivity, 11029.98ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 148.12ms AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 8.95ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 6.17ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 218.45ms SsaConstructionTime, 1005.55ms SatisfiabilityAnalysisTime, 291904.41ms InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 6864 ConstructedInterpolants, 0 QuantifiedInterpolants, 20866 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6266 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 24506/54808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-29 16:38:14,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...