./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label11.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 b0d31ac0a4760541f0d40c4e2a162c7e746a87cea96b874d39053630478d669b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:12:27,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:12:27,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:12:27,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:12:27,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:12:27,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:12:27,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:12:27,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:12:27,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:12:27,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:12:27,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:12:27,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:12:27,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:12:27,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:12:27,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:12:27,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:12:27,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:12:27,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:12:27,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:12:27,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:12:27,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:12:27,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:12:27,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:12:27,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:12:27,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:12:27,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:12:27,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:12:27,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:12:27,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:12:27,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:12:27,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:12:27,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:12:27,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:12:27,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:12:27,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:12:27,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:12:27,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:12:27,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:12:27,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:12:27,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:12:27,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:12:27,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:12:27,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:12:27,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:12:27,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:12:27,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:12:27,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:12:27,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:12:27,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:12:27,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:12:27,823 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:12:27,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:12:27,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:12:27,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:12:27,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:12:27,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:12:27,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:12:27,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:12:27,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:12:27,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:12:27,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0d31ac0a4760541f0d40c4e2a162c7e746a87cea96b874d39053630478d669b [2021-12-21 11:12:28,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:12:28,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:12:28,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:12:28,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:12:28,038 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:12:28,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label11.c [2021-12-21 11:12:28,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56ef4ba3/fc30cc1e95ea4b688bfe9ea4bab1721f/FLAG447899608 [2021-12-21 11:12:28,600 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:12:28,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label11.c [2021-12-21 11:12:28,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56ef4ba3/fc30cc1e95ea4b688bfe9ea4bab1721f/FLAG447899608 [2021-12-21 11:12:29,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56ef4ba3/fc30cc1e95ea4b688bfe9ea4bab1721f [2021-12-21 11:12:29,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:12:29,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:12:29,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:12:29,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:12:29,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:12:29,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:29,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1592c9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29, skipping insertion in model container [2021-12-21 11:12:29,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:29,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:12:29,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:12:29,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label11.c[6732,6745] [2021-12-21 11:12:29,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:12:29,729 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:12:29,751 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label11.c[6732,6745] [2021-12-21 11:12:29,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:12:29,927 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:12:29,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29 WrapperNode [2021-12-21 11:12:29,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:12:29,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:12:29,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:12:29,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:12:29,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:29,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,050 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-21 11:12:30,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:12:30,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:12:30,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:12:30,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:12:30,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:12:30,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:12:30,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:12:30,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:12:30,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (1/1) ... [2021-12-21 11:12:30,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:12:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:30,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:12:30,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:12:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:12:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:12:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:12:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:12:30,341 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:12:30,342 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:12:32,231 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:12:32,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:12:32,239 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:12:32,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:32 BoogieIcfgContainer [2021-12-21 11:12:32,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:12:32,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:12:32,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:12:32,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:12:32,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:12:29" (1/3) ... [2021-12-21 11:12:32,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1f9e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:32, skipping insertion in model container [2021-12-21 11:12:32,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:29" (2/3) ... [2021-12-21 11:12:32,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1f9e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:32, skipping insertion in model container [2021-12-21 11:12:32,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:32" (3/3) ... [2021-12-21 11:12:32,265 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label11.c [2021-12-21 11:12:32,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:12:32,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:12:32,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:12:32,314 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:12:32,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:12:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 11:12:32,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:32,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:32,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2021-12-21 11:12:32,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:32,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944612952] [2021-12-21 11:12:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:32,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:32,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:32,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944612952] [2021-12-21 11:12:32,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944612952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:32,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:32,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:32,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057728943] [2021-12-21 11:12:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:32,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:32,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:32,615 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:34,422 INFO L93 Difference]: Finished difference Result 1197 states and 2163 transitions. [2021-12-21 11:12:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-21 11:12:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:34,436 INFO L225 Difference]: With dead ends: 1197 [2021-12-21 11:12:34,436 INFO L226 Difference]: Without dead ends: 694 [2021-12-21 11:12:34,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:34,442 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 363 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:34,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 114 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:12:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-21 11:12:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 684. [2021-12-21 11:12:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.718887262079063) internal successors, (1174), 683 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1174 transitions. [2021-12-21 11:12:34,493 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1174 transitions. Word has length 55 [2021-12-21 11:12:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:34,493 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1174 transitions. [2021-12-21 11:12:34,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1174 transitions. [2021-12-21 11:12:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 11:12:34,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:34,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:34,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:12:34,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1666804951, now seen corresponding path program 1 times [2021-12-21 11:12:34,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083016516] [2021-12-21 11:12:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:34,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:34,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083016516] [2021-12-21 11:12:34,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083016516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:34,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:34,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:34,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626580302] [2021-12-21 11:12:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:34,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:34,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:34,653 INFO L87 Difference]: Start difference. First operand 684 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:35,977 INFO L93 Difference]: Finished difference Result 1681 states and 2896 transitions. [2021-12-21 11:12:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-21 11:12:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:35,981 INFO L225 Difference]: With dead ends: 1681 [2021-12-21 11:12:35,981 INFO L226 Difference]: Without dead ends: 999 [2021-12-21 11:12:35,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:35,984 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 254 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:35,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 226 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:12:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-12-21 11:12:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 989. [2021-12-21 11:12:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.6194331983805668) internal successors, (1600), 988 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1600 transitions. [2021-12-21 11:12:36,017 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1600 transitions. Word has length 120 [2021-12-21 11:12:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:36,017 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1600 transitions. [2021-12-21 11:12:36,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1600 transitions. [2021-12-21 11:12:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 11:12:36,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:36,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:36,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:12:36,021 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2119716484, now seen corresponding path program 1 times [2021-12-21 11:12:36,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:36,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81066823] [2021-12-21 11:12:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:36,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:36,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81066823] [2021-12-21 11:12:36,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81066823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:36,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:36,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:36,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791470518] [2021-12-21 11:12:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:36,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:36,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:36,100 INFO L87 Difference]: Start difference. First operand 989 states and 1600 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:37,135 INFO L93 Difference]: Finished difference Result 2575 states and 4255 transitions. [2021-12-21 11:12:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-21 11:12:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:37,140 INFO L225 Difference]: With dead ends: 2575 [2021-12-21 11:12:37,141 INFO L226 Difference]: Without dead ends: 1588 [2021-12-21 11:12:37,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:37,143 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 284 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:37,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 337 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:12:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-12-21 11:12:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1584. [2021-12-21 11:12:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 1.3986102337334176) internal successors, (2214), 1583 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2214 transitions. [2021-12-21 11:12:37,186 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2214 transitions. Word has length 121 [2021-12-21 11:12:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 2214 transitions. [2021-12-21 11:12:37,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2214 transitions. [2021-12-21 11:12:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 11:12:37,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:37,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:12:37,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1178280902, now seen corresponding path program 1 times [2021-12-21 11:12:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:37,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069617707] [2021-12-21 11:12:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:37,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:37,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069617707] [2021-12-21 11:12:37,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069617707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:37,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:37,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:12:37,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22239983] [2021-12-21 11:12:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:37,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:12:37,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:12:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:12:37,319 INFO L87 Difference]: Start difference. First operand 1584 states and 2214 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:39,039 INFO L93 Difference]: Finished difference Result 4090 states and 5888 transitions. [2021-12-21 11:12:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:12:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-21 11:12:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:39,049 INFO L225 Difference]: With dead ends: 4090 [2021-12-21 11:12:39,049 INFO L226 Difference]: Without dead ends: 2807 [2021-12-21 11:12:39,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:12:39,058 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 349 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:39,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 416 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:12:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-12-21 11:12:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2184. [2021-12-21 11:12:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 1.3302794319743472) internal successors, (2904), 2183 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2904 transitions. [2021-12-21 11:12:39,098 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2904 transitions. Word has length 125 [2021-12-21 11:12:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:39,099 INFO L470 AbstractCegarLoop]: Abstraction has 2184 states and 2904 transitions. [2021-12-21 11:12:39,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2904 transitions. [2021-12-21 11:12:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-21 11:12:39,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:39,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:39,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:12:39,103 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2088752626, now seen corresponding path program 1 times [2021-12-21 11:12:39,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282016708] [2021-12-21 11:12:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:39,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 11:12:39,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282016708] [2021-12-21 11:12:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282016708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:39,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:39,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354663360] [2021-12-21 11:12:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:39,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:39,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:39,311 INFO L87 Difference]: Start difference. First operand 2184 states and 2904 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:41,107 INFO L93 Difference]: Finished difference Result 5868 states and 7890 transitions. [2021-12-21 11:12:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-12-21 11:12:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:41,118 INFO L225 Difference]: With dead ends: 5868 [2021-12-21 11:12:41,118 INFO L226 Difference]: Without dead ends: 3686 [2021-12-21 11:12:41,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:41,123 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:41,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 317 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:12:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-12-21 11:12:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3684. [2021-12-21 11:12:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 1.25821341297855) internal successors, (4634), 3683 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 4634 transitions. [2021-12-21 11:12:41,165 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 4634 transitions. Word has length 325 [2021-12-21 11:12:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:41,167 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 4634 transitions. [2021-12-21 11:12:41,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 4634 transitions. [2021-12-21 11:12:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-21 11:12:41,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:41,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:41,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:12:41,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1998947477, now seen corresponding path program 1 times [2021-12-21 11:12:41,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:41,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969189902] [2021-12-21 11:12:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:41,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-21 11:12:41,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969189902] [2021-12-21 11:12:41,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969189902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:41,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:41,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:41,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456635670] [2021-12-21 11:12:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:41,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:41,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:41,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:41,300 INFO L87 Difference]: Start difference. First operand 3684 states and 4634 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:42,520 INFO L93 Difference]: Finished difference Result 7665 states and 9577 transitions. [2021-12-21 11:12:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-12-21 11:12:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:42,531 INFO L225 Difference]: With dead ends: 7665 [2021-12-21 11:12:42,531 INFO L226 Difference]: Without dead ends: 3983 [2021-12-21 11:12:42,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:42,535 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:42,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:12:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2021-12-21 11:12:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3983. [2021-12-21 11:12:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 3982 states have (on average 1.2403314917127073) internal successors, (4939), 3982 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4939 transitions. [2021-12-21 11:12:42,583 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4939 transitions. Word has length 373 [2021-12-21 11:12:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:42,583 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 4939 transitions. [2021-12-21 11:12:42,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4939 transitions. [2021-12-21 11:12:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-12-21 11:12:42,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:42,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:42,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:12:42,588 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1174077085, now seen corresponding path program 1 times [2021-12-21 11:12:42,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:42,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196482284] [2021-12-21 11:12:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:42,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:12:42,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196482284] [2021-12-21 11:12:42,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196482284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:42,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:42,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:42,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146670310] [2021-12-21 11:12:42,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:42,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:42,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:42,730 INFO L87 Difference]: Start difference. First operand 3983 states and 4939 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:44,215 INFO L93 Difference]: Finished difference Result 8861 states and 11333 transitions. [2021-12-21 11:12:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:44,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 416 [2021-12-21 11:12:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:44,229 INFO L225 Difference]: With dead ends: 8861 [2021-12-21 11:12:44,229 INFO L226 Difference]: Without dead ends: 5179 [2021-12-21 11:12:44,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:44,234 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 259 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:44,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:12:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-12-21 11:12:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 3381. [2021-12-21 11:12:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.26301775147929) internal successors, (4269), 3380 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4269 transitions. [2021-12-21 11:12:44,284 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4269 transitions. Word has length 416 [2021-12-21 11:12:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:44,284 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4269 transitions. [2021-12-21 11:12:44,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4269 transitions. [2021-12-21 11:12:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-12-21 11:12:44,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:44,289 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:44,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:12:44,289 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1674238342, now seen corresponding path program 1 times [2021-12-21 11:12:44,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:44,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925455834] [2021-12-21 11:12:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:44,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:44,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:44,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925455834] [2021-12-21 11:12:44,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925455834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:44,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:44,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:12:44,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328619671] [2021-12-21 11:12:44,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:12:44,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:12:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:12:44,470 INFO L87 Difference]: Start difference. First operand 3381 states and 4269 transitions. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:46,234 INFO L93 Difference]: Finished difference Result 8297 states and 10744 transitions. [2021-12-21 11:12:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:12:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 420 [2021-12-21 11:12:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:46,246 INFO L225 Difference]: With dead ends: 8297 [2021-12-21 11:12:46,246 INFO L226 Difference]: Without dead ends: 5217 [2021-12-21 11:12:46,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:12:46,249 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 387 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:46,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 379 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:12:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2021-12-21 11:12:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 4878. [2021-12-21 11:12:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 1.2259585810949354) internal successors, (5979), 4877 states have internal predecessors, (5979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 5979 transitions. [2021-12-21 11:12:46,303 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 5979 transitions. Word has length 420 [2021-12-21 11:12:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:46,304 INFO L470 AbstractCegarLoop]: Abstraction has 4878 states and 5979 transitions. [2021-12-21 11:12:46,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 5979 transitions. [2021-12-21 11:12:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-21 11:12:46,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:46,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:46,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:12:46,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash 381390040, now seen corresponding path program 1 times [2021-12-21 11:12:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358650233] [2021-12-21 11:12:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:46,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:12:46,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358650233] [2021-12-21 11:12:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358650233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:46,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86456267] [2021-12-21 11:12:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:46,422 INFO L87 Difference]: Start difference. First operand 4878 states and 5979 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:47,662 INFO L93 Difference]: Finished difference Result 10952 states and 13771 transitions. [2021-12-21 11:12:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:47,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 432 [2021-12-21 11:12:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:47,679 INFO L225 Difference]: With dead ends: 10952 [2021-12-21 11:12:47,681 INFO L226 Difference]: Without dead ends: 6375 [2021-12-21 11:12:47,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:47,687 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 273 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:47,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 619 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:12:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-12-21 11:12:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6374. [2021-12-21 11:12:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6374 states, 6373 states have (on average 1.198022909147968) internal successors, (7635), 6373 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6374 states to 6374 states and 7635 transitions. [2021-12-21 11:12:47,785 INFO L78 Accepts]: Start accepts. Automaton has 6374 states and 7635 transitions. Word has length 432 [2021-12-21 11:12:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:47,786 INFO L470 AbstractCegarLoop]: Abstraction has 6374 states and 7635 transitions. [2021-12-21 11:12:47,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6374 states and 7635 transitions. [2021-12-21 11:12:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-12-21 11:12:47,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:47,797 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:47,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:12:47,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:47,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1616945835, now seen corresponding path program 1 times [2021-12-21 11:12:47,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:47,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569326966] [2021-12-21 11:12:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:47,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-21 11:12:47,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569326966] [2021-12-21 11:12:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569326966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:47,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:47,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:47,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715629260] [2021-12-21 11:12:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:47,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:47,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:47,942 INFO L87 Difference]: Start difference. First operand 6374 states and 7635 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:49,384 INFO L93 Difference]: Finished difference Result 16633 states and 20159 transitions. [2021-12-21 11:12:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 529 [2021-12-21 11:12:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:49,458 INFO L225 Difference]: With dead ends: 16633 [2021-12-21 11:12:49,458 INFO L226 Difference]: Without dead ends: 10560 [2021-12-21 11:12:49,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:49,463 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 285 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 263 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:12:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2021-12-21 11:12:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 8467. [2021-12-21 11:12:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8467 states, 8466 states have (on average 1.1961965509095205) internal successors, (10127), 8466 states have internal predecessors, (10127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 10127 transitions. [2021-12-21 11:12:49,557 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 10127 transitions. Word has length 529 [2021-12-21 11:12:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 8467 states and 10127 transitions. [2021-12-21 11:12:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 10127 transitions. [2021-12-21 11:12:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-12-21 11:12:49,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:49,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:49,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:12:49,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1652572232, now seen corresponding path program 1 times [2021-12-21 11:12:49,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:49,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390309755] [2021-12-21 11:12:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:49,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-21 11:12:49,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390309755] [2021-12-21 11:12:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390309755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:49,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:49,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446572635] [2021-12-21 11:12:49,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:49,692 INFO L87 Difference]: Start difference. First operand 8467 states and 10127 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:51,264 INFO L93 Difference]: Finished difference Result 19937 states and 23976 transitions. [2021-12-21 11:12:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 546 [2021-12-21 11:12:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:51,281 INFO L225 Difference]: With dead ends: 19937 [2021-12-21 11:12:51,282 INFO L226 Difference]: Without dead ends: 11771 [2021-12-21 11:12:51,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:51,286 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 243 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:51,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 621 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:12:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-12-21 11:12:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 11759. [2021-12-21 11:12:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 1.173924136757952) internal successors, (13803), 11758 states have internal predecessors, (13803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 13803 transitions. [2021-12-21 11:12:51,395 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 13803 transitions. Word has length 546 [2021-12-21 11:12:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:51,395 INFO L470 AbstractCegarLoop]: Abstraction has 11759 states and 13803 transitions. [2021-12-21 11:12:51,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 13803 transitions. [2021-12-21 11:12:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-12-21 11:12:51,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:51,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:51,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:12:51,402 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -889884113, now seen corresponding path program 1 times [2021-12-21 11:12:51,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:51,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142876881] [2021-12-21 11:12:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:51,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-21 11:12:51,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142876881] [2021-12-21 11:12:51,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142876881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:51,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:51,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:51,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999858660] [2021-12-21 11:12:51,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:51,560 INFO L87 Difference]: Start difference. First operand 11759 states and 13803 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:52,875 INFO L93 Difference]: Finished difference Result 23514 states and 27644 transitions. [2021-12-21 11:12:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 556 [2021-12-21 11:12:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:52,892 INFO L225 Difference]: With dead ends: 23514 [2021-12-21 11:12:52,892 INFO L226 Difference]: Without dead ends: 12056 [2021-12-21 11:12:52,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:52,900 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 465 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:52,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 71 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:12:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-12-21 11:12:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 11757. [2021-12-21 11:12:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11757 states, 11756 states have (on average 1.1737835998638992) internal successors, (13799), 11756 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11757 states to 11757 states and 13799 transitions. [2021-12-21 11:12:53,019 INFO L78 Accepts]: Start accepts. Automaton has 11757 states and 13799 transitions. Word has length 556 [2021-12-21 11:12:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 11757 states and 13799 transitions. [2021-12-21 11:12:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11757 states and 13799 transitions. [2021-12-21 11:12:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-12-21 11:12:53,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:53,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:12:53,027 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 967458274, now seen corresponding path program 1 times [2021-12-21 11:12:53,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517298773] [2021-12-21 11:12:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:53,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-21 11:12:53,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517298773] [2021-12-21 11:12:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517298773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:53,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:53,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:53,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116592375] [2021-12-21 11:12:53,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:53,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:53,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:53,181 INFO L87 Difference]: Start difference. First operand 11757 states and 13799 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:54,243 INFO L93 Difference]: Finished difference Result 24708 states and 28972 transitions. [2021-12-21 11:12:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2021-12-21 11:12:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:54,260 INFO L225 Difference]: With dead ends: 24708 [2021-12-21 11:12:54,260 INFO L226 Difference]: Without dead ends: 13252 [2021-12-21 11:12:54,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:54,270 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 270 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:54,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 324 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:12:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2021-12-21 11:12:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 9960. [2021-12-21 11:12:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9960 states, 9959 states have (on average 1.1905813836730594) internal successors, (11857), 9959 states have internal predecessors, (11857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9960 states to 9960 states and 11857 transitions. [2021-12-21 11:12:54,397 INFO L78 Accepts]: Start accepts. Automaton has 9960 states and 11857 transitions. Word has length 576 [2021-12-21 11:12:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:54,398 INFO L470 AbstractCegarLoop]: Abstraction has 9960 states and 11857 transitions. [2021-12-21 11:12:54,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9960 states and 11857 transitions. [2021-12-21 11:12:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-12-21 11:12:54,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:54,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:54,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:12:54,407 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash -270881818, now seen corresponding path program 1 times [2021-12-21 11:12:54,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:54,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566464842] [2021-12-21 11:12:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:54,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:12:54,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566464842] [2021-12-21 11:12:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566464842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:54,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977757593] [2021-12-21 11:12:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:54,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:54,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:54,563 INFO L87 Difference]: Start difference. First operand 9960 states and 11857 transitions. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:56,042 INFO L93 Difference]: Finished difference Result 25898 states and 30912 transitions. [2021-12-21 11:12:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 582 [2021-12-21 11:12:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:56,061 INFO L225 Difference]: With dead ends: 25898 [2021-12-21 11:12:56,061 INFO L226 Difference]: Without dead ends: 16239 [2021-12-21 11:12:56,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:56,068 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 223 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:56,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 189 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:12:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16239 states. [2021-12-21 11:12:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16239 to 12053. [2021-12-21 11:12:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12053 states, 12052 states have (on average 1.211749087288417) internal successors, (14604), 12052 states have internal predecessors, (14604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12053 states to 12053 states and 14604 transitions. [2021-12-21 11:12:56,241 INFO L78 Accepts]: Start accepts. Automaton has 12053 states and 14604 transitions. Word has length 582 [2021-12-21 11:12:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 12053 states and 14604 transitions. [2021-12-21 11:12:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12053 states and 14604 transitions. [2021-12-21 11:12:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2021-12-21 11:12:56,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:56,249 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:56,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:12:56,250 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -830480631, now seen corresponding path program 1 times [2021-12-21 11:12:56,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:56,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024611645] [2021-12-21 11:12:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:56,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 599 proven. 39 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-21 11:12:56,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024611645] [2021-12-21 11:12:56,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024611645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:12:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204729081] [2021-12-21 11:12:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:56,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:12:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:56,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:12:56,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:12:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:12:56,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:12:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-21 11:12:57,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:12:57,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204729081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:57,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:12:57,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:12:57,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036143137] [2021-12-21 11:12:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:57,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:57,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:12:57,154 INFO L87 Difference]: Start difference. First operand 12053 states and 14604 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:58,520 INFO L93 Difference]: Finished difference Result 27095 states and 33543 transitions. [2021-12-21 11:12:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 619 [2021-12-21 11:12:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:58,540 INFO L225 Difference]: With dead ends: 27095 [2021-12-21 11:12:58,541 INFO L226 Difference]: Without dead ends: 15343 [2021-12-21 11:12:58,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:12:58,550 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 266 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:58,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 634 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:12:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-12-21 11:12:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 14446. [2021-12-21 11:12:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14446 states, 14445 states have (on average 1.1910695742471444) internal successors, (17205), 14445 states have internal predecessors, (17205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 17205 transitions. [2021-12-21 11:12:58,721 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 17205 transitions. Word has length 619 [2021-12-21 11:12:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:58,735 INFO L470 AbstractCegarLoop]: Abstraction has 14446 states and 17205 transitions. [2021-12-21 11:12:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 17205 transitions. [2021-12-21 11:12:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-12-21 11:12:58,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:58,760 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:58,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:12:58,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 11:12:58,976 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1205457609, now seen corresponding path program 1 times [2021-12-21 11:12:58,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:58,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828277696] [2021-12-21 11:12:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:58,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 745 proven. 39 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-21 11:12:59,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828277696] [2021-12-21 11:12:59,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828277696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:12:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884043329] [2021-12-21 11:12:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:59,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:12:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:59,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:12:59,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:12:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:12:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 745 proven. 39 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-21 11:13:00,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:13:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 745 proven. 39 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-21 11:13:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884043329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:13:01,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:13:01,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-21 11:13:01,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547822678] [2021-12-21 11:13:01,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:13:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:13:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:13:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:13:01,852 INFO L87 Difference]: Start difference. First operand 14446 states and 17205 transitions. Second operand has 9 states, 9 states have (on average 82.66666666666667) internal successors, (744), 8 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:06,338 INFO L93 Difference]: Finished difference Result 36223 states and 42637 transitions. [2021-12-21 11:13:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:13:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 82.66666666666667) internal successors, (744), 8 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 676 [2021-12-21 11:13:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:06,359 INFO L225 Difference]: With dead ends: 36223 [2021-12-21 11:13:06,359 INFO L226 Difference]: Without dead ends: 16839 [2021-12-21 11:13:06,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1361 GetRequests, 1346 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-21 11:13:06,364 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2855 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 5804 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2855 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 6474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 5804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:06,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2855 Valid, 236 Invalid, 6474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 5804 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 11:13:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16839 states. [2021-12-21 11:13:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16839 to 16836. [2021-12-21 11:13:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16836 states, 16835 states have (on average 1.0657558657558657) internal successors, (17942), 16835 states have internal predecessors, (17942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16836 states to 16836 states and 17942 transitions. [2021-12-21 11:13:06,514 INFO L78 Accepts]: Start accepts. Automaton has 16836 states and 17942 transitions. Word has length 676 [2021-12-21 11:13:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:06,514 INFO L470 AbstractCegarLoop]: Abstraction has 16836 states and 17942 transitions. [2021-12-21 11:13:06,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.66666666666667) internal successors, (744), 8 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 16836 states and 17942 transitions. [2021-12-21 11:13:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2021-12-21 11:13:06,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:06,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:06,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:13:06,740 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,SelfDestructingSolverStorable15 [2021-12-21 11:13:06,741 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 547646301, now seen corresponding path program 1 times [2021-12-21 11:13:06,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:06,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443460361] [2021-12-21 11:13:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:06,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-21 11:13:06,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:06,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443460361] [2021-12-21 11:13:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443460361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:06,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:06,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:06,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867011561] [2021-12-21 11:13:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:06,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:06,976 INFO L87 Difference]: Start difference. First operand 16836 states and 17942 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:07,753 INFO L93 Difference]: Finished difference Result 35761 states and 38184 transitions. [2021-12-21 11:13:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 684 [2021-12-21 11:13:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:07,802 INFO L225 Difference]: With dead ends: 35761 [2021-12-21 11:13:07,802 INFO L226 Difference]: Without dead ends: 19226 [2021-12-21 11:13:07,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:07,833 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 225 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:07,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 505 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19226 states. [2021-12-21 11:13:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19226 to 18927. [2021-12-21 11:13:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18927 states, 18926 states have (on average 1.054845186515904) internal successors, (19964), 18926 states have internal predecessors, (19964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18927 states to 18927 states and 19964 transitions. [2021-12-21 11:13:08,219 INFO L78 Accepts]: Start accepts. Automaton has 18927 states and 19964 transitions. Word has length 684 [2021-12-21 11:13:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 18927 states and 19964 transitions. [2021-12-21 11:13:08,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18927 states and 19964 transitions. [2021-12-21 11:13:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2021-12-21 11:13:08,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:08,242 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:08,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:13:08,242 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1636456743, now seen corresponding path program 1 times [2021-12-21 11:13:08,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809543939] [2021-12-21 11:13:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:08,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 292 proven. 269 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-21 11:13:08,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809543939] [2021-12-21 11:13:08,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809543939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:08,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650910994] [2021-12-21 11:13:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:08,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:08,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:08,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:13:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:08,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:13:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-21 11:13:09,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:13:09,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650910994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:09,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:13:09,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:13:09,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007875305] [2021-12-21 11:13:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:09,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:09,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:13:09,716 INFO L87 Difference]: Start difference. First operand 18927 states and 19964 transitions. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:10,571 INFO L93 Difference]: Finished difference Result 37555 states and 39628 transitions. [2021-12-21 11:13:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 694 [2021-12-21 11:13:10,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:10,588 INFO L225 Difference]: With dead ends: 37555 [2021-12-21 11:13:10,588 INFO L226 Difference]: Without dead ends: 18929 [2021-12-21 11:13:10,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:13:10,600 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 104 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:10,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 395 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-12-21 11:13:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 18626. [2021-12-21 11:13:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18626 states, 18625 states have (on average 1.0488053691275168) internal successors, (19534), 18625 states have internal predecessors, (19534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18626 states to 18626 states and 19534 transitions. [2021-12-21 11:13:10,760 INFO L78 Accepts]: Start accepts. Automaton has 18626 states and 19534 transitions. Word has length 694 [2021-12-21 11:13:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:10,760 INFO L470 AbstractCegarLoop]: Abstraction has 18626 states and 19534 transitions. [2021-12-21 11:13:10,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 18626 states and 19534 transitions. [2021-12-21 11:13:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2021-12-21 11:13:10,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:10,772 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:10,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 11:13:10,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 11:13:10,993 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 696512821, now seen corresponding path program 1 times [2021-12-21 11:13:10,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798287620] [2021-12-21 11:13:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:10,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:13:11,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798287620] [2021-12-21 11:13:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798287620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:11,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:11,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:11,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789442486] [2021-12-21 11:13:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:11,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:11,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:11,215 INFO L87 Difference]: Start difference. First operand 18626 states and 19534 transitions. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:13,123 INFO L93 Difference]: Finished difference Result 42657 states and 44659 transitions. [2021-12-21 11:13:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 732 [2021-12-21 11:13:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:13,149 INFO L225 Difference]: With dead ends: 42657 [2021-12-21 11:13:13,149 INFO L226 Difference]: Without dead ends: 24332 [2021-12-21 11:13:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:13,163 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 368 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:13,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 498 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:13:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24332 states. [2021-12-21 11:13:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24332 to 22533. [2021-12-21 11:13:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22533 states, 22532 states have (on average 1.0431386472572342) internal successors, (23504), 22532 states have internal predecessors, (23504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 23504 transitions. [2021-12-21 11:13:13,482 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 23504 transitions. Word has length 732 [2021-12-21 11:13:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:13,483 INFO L470 AbstractCegarLoop]: Abstraction has 22533 states and 23504 transitions. [2021-12-21 11:13:13,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 23504 transitions. [2021-12-21 11:13:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2021-12-21 11:13:13,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:13,492 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 11:13:13,493 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1684182335, now seen corresponding path program 1 times [2021-12-21 11:13:13,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:13,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229982217] [2021-12-21 11:13:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:13,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 563 proven. 188 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-21 11:13:13,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229982217] [2021-12-21 11:13:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229982217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661909518] [2021-12-21 11:13:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:13,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:13,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:13:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:13:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-21 11:13:16,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:13:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661909518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:16,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:13:16,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:13:16,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430858611] [2021-12-21 11:13:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:13:16,523 INFO L87 Difference]: Start difference. First operand 22533 states and 23504 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:16,591 INFO L93 Difference]: Finished difference Result 23437 states and 24418 transitions. [2021-12-21 11:13:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 746 [2021-12-21 11:13:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:16,613 INFO L225 Difference]: With dead ends: 23437 [2021-12-21 11:13:16,614 INFO L226 Difference]: Without dead ends: 23435 [2021-12-21 11:13:16,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:13:16,621 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 255 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:16,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 523 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 785 Unchecked, 0.0s Time] [2021-12-21 11:13:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23435 states. [2021-12-21 11:13:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23435 to 22234. [2021-12-21 11:13:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22234 states, 22233 states have (on average 1.042819232672154) internal successors, (23185), 22233 states have internal predecessors, (23185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22234 states to 22234 states and 23185 transitions. [2021-12-21 11:13:16,920 INFO L78 Accepts]: Start accepts. Automaton has 22234 states and 23185 transitions. Word has length 746 [2021-12-21 11:13:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:16,921 INFO L470 AbstractCegarLoop]: Abstraction has 22234 states and 23185 transitions. [2021-12-21 11:13:16,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22234 states and 23185 transitions. [2021-12-21 11:13:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2021-12-21 11:13:16,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:16,936 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:16,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:13:17,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:17,152 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 341621360, now seen corresponding path program 1 times [2021-12-21 11:13:17,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:17,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029967657] [2021-12-21 11:13:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:17,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 803 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-21 11:13:17,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029967657] [2021-12-21 11:13:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029967657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:17,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:17,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:17,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437571939] [2021-12-21 11:13:17,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:17,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:17,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:17,405 INFO L87 Difference]: Start difference. First operand 22234 states and 23185 transitions. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:18,436 INFO L93 Difference]: Finished difference Result 44956 states and 46868 transitions. [2021-12-21 11:13:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:13:18,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 865 [2021-12-21 11:13:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:18,459 INFO L225 Difference]: With dead ends: 44956 [2021-12-21 11:13:18,459 INFO L226 Difference]: Without dead ends: 23023 [2021-12-21 11:13:18,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:13:18,472 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 314 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:18,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 627 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:13:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23023 states. [2021-12-21 11:13:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23023 to 22834. [2021-12-21 11:13:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22834 states, 22833 states have (on average 1.041869224368239) internal successors, (23789), 22833 states have internal predecessors, (23789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22834 states to 22834 states and 23789 transitions. [2021-12-21 11:13:18,801 INFO L78 Accepts]: Start accepts. Automaton has 22834 states and 23789 transitions. Word has length 865 [2021-12-21 11:13:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 22834 states and 23789 transitions. [2021-12-21 11:13:18,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22834 states and 23789 transitions. [2021-12-21 11:13:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2021-12-21 11:13:18,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:18,815 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:18,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 11:13:18,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1669164797, now seen corresponding path program 1 times [2021-12-21 11:13:18,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:18,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171297365] [2021-12-21 11:13:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:18,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 1068 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-12-21 11:13:19,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171297365] [2021-12-21 11:13:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171297365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:19,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:19,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:19,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020485133] [2021-12-21 11:13:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:19,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:19,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:19,044 INFO L87 Difference]: Start difference. First operand 22834 states and 23789 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:19,866 INFO L93 Difference]: Finished difference Result 45663 states and 47588 transitions. [2021-12-21 11:13:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 895 [2021-12-21 11:13:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:19,890 INFO L225 Difference]: With dead ends: 45663 [2021-12-21 11:13:19,890 INFO L226 Difference]: Without dead ends: 23130 [2021-12-21 11:13:19,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:19,904 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 246 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:19,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 454 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23130 states. [2021-12-21 11:13:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23130 to 21634. [2021-12-21 11:13:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21634 states, 21633 states have (on average 1.0413719779965793) internal successors, (22528), 21633 states have internal predecessors, (22528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21634 states to 21634 states and 22528 transitions. [2021-12-21 11:13:20,315 INFO L78 Accepts]: Start accepts. Automaton has 21634 states and 22528 transitions. Word has length 895 [2021-12-21 11:13:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:20,316 INFO L470 AbstractCegarLoop]: Abstraction has 21634 states and 22528 transitions. [2021-12-21 11:13:20,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 21634 states and 22528 transitions. [2021-12-21 11:13:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-12-21 11:13:20,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:20,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:20,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 11:13:20,330 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1629824559, now seen corresponding path program 1 times [2021-12-21 11:13:20,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:20,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623456099] [2021-12-21 11:13:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:20,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 871 proven. 531 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:13:20,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623456099] [2021-12-21 11:13:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623456099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584925302] [2021-12-21 11:13:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:20,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:20,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:20,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:13:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:13:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 1092 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-21 11:13:21,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:13:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584925302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:21,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:13:21,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-21 11:13:21,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916080588] [2021-12-21 11:13:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:13:21,860 INFO L87 Difference]: Start difference. First operand 21634 states and 22528 transitions. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:22,748 INFO L93 Difference]: Finished difference Result 42666 states and 44447 transitions. [2021-12-21 11:13:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 900 [2021-12-21 11:13:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:22,771 INFO L225 Difference]: With dead ends: 42666 [2021-12-21 11:13:22,771 INFO L226 Difference]: Without dead ends: 21333 [2021-12-21 11:13:22,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:13:22,785 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 226 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:22,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 461 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:13:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21333 states. [2021-12-21 11:13:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21333 to 21333. [2021-12-21 11:13:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21333 states, 21332 states have (on average 1.0318769923120195) internal successors, (22012), 21332 states have internal predecessors, (22012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21333 states to 21333 states and 22012 transitions. [2021-12-21 11:13:23,079 INFO L78 Accepts]: Start accepts. Automaton has 21333 states and 22012 transitions. Word has length 900 [2021-12-21 11:13:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 21333 states and 22012 transitions. [2021-12-21 11:13:23,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21333 states and 22012 transitions. [2021-12-21 11:13:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2021-12-21 11:13:23,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:23,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:23,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 11:13:23,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 11:13:23,309 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash -470354541, now seen corresponding path program 1 times [2021-12-21 11:13:23,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:23,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179454651] [2021-12-21 11:13:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:23,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 855 proven. 0 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2021-12-21 11:13:23,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179454651] [2021-12-21 11:13:23,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179454651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:23,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:23,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:13:23,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898399447] [2021-12-21 11:13:23,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:23,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:13:23,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:13:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:13:23,565 INFO L87 Difference]: Start difference. First operand 21333 states and 22012 transitions. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:24,784 INFO L93 Difference]: Finished difference Result 44646 states and 46038 transitions. [2021-12-21 11:13:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:13:24,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 919 [2021-12-21 11:13:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:24,815 INFO L225 Difference]: With dead ends: 44646 [2021-12-21 11:13:24,816 INFO L226 Difference]: Without dead ends: 23614 [2021-12-21 11:13:24,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:24,829 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 632 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:24,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 617 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:13:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23614 states. [2021-12-21 11:13:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23614 to 21333. [2021-12-21 11:13:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21333 states, 21332 states have (on average 1.0318301143821489) internal successors, (22011), 21332 states have internal predecessors, (22011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21333 states to 21333 states and 22011 transitions. [2021-12-21 11:13:25,028 INFO L78 Accepts]: Start accepts. Automaton has 21333 states and 22011 transitions. Word has length 919 [2021-12-21 11:13:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:25,029 INFO L470 AbstractCegarLoop]: Abstraction has 21333 states and 22011 transitions. [2021-12-21 11:13:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21333 states and 22011 transitions. [2021-12-21 11:13:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2021-12-21 11:13:25,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:25,042 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 11:13:25,042 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1011364661, now seen corresponding path program 1 times [2021-12-21 11:13:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552013397] [2021-12-21 11:13:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:25,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 1270 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-21 11:13:25,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552013397] [2021-12-21 11:13:25,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552013397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:25,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:25,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:13:25,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037933296] [2021-12-21 11:13:25,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:25,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:13:25,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:13:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:13:25,402 INFO L87 Difference]: Start difference. First operand 21333 states and 22011 transitions. Second operand has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:26,529 INFO L93 Difference]: Finished difference Result 43731 states and 45101 transitions. [2021-12-21 11:13:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:13:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 952 [2021-12-21 11:13:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:26,550 INFO L225 Difference]: With dead ends: 43731 [2021-12-21 11:13:26,550 INFO L226 Difference]: Without dead ends: 22699 [2021-12-21 11:13:26,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:26,564 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 529 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:26,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 636 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:13:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22699 states. [2021-12-21 11:13:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22699 to 18630. [2021-12-21 11:13:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18630 states, 18629 states have (on average 1.0338182403779055) internal successors, (19259), 18629 states have internal predecessors, (19259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18630 states to 18630 states and 19259 transitions. [2021-12-21 11:13:26,741 INFO L78 Accepts]: Start accepts. Automaton has 18630 states and 19259 transitions. Word has length 952 [2021-12-21 11:13:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:26,742 INFO L470 AbstractCegarLoop]: Abstraction has 18630 states and 19259 transitions. [2021-12-21 11:13:26,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18630 states and 19259 transitions. [2021-12-21 11:13:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2021-12-21 11:13:26,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:26,755 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:26,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 11:13:26,755 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1022383996, now seen corresponding path program 1 times [2021-12-21 11:13:26,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136191524] [2021-12-21 11:13:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:26,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2364 backedges. 1459 proven. 0 refuted. 0 times theorem prover too weak. 905 trivial. 0 not checked. [2021-12-21 11:13:26,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136191524] [2021-12-21 11:13:26,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136191524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:26,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:26,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:26,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85510952] [2021-12-21 11:13:26,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:26,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:26,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:26,971 INFO L87 Difference]: Start difference. First operand 18630 states and 19259 transitions. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:27,764 INFO L93 Difference]: Finished difference Result 36959 states and 38215 transitions. [2021-12-21 11:13:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1012 [2021-12-21 11:13:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:27,785 INFO L225 Difference]: With dead ends: 36959 [2021-12-21 11:13:27,786 INFO L226 Difference]: Without dead ends: 18630 [2021-12-21 11:13:27,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:27,798 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 239 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:27,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 491 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18630 states. [2021-12-21 11:13:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18630 to 18030. [2021-12-21 11:13:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18030 states, 18029 states have (on average 1.028454157191192) internal successors, (18542), 18029 states have internal predecessors, (18542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18030 states to 18030 states and 18542 transitions. [2021-12-21 11:13:27,975 INFO L78 Accepts]: Start accepts. Automaton has 18030 states and 18542 transitions. Word has length 1012 [2021-12-21 11:13:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:27,975 INFO L470 AbstractCegarLoop]: Abstraction has 18030 states and 18542 transitions. [2021-12-21 11:13:27,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18030 states and 18542 transitions. [2021-12-21 11:13:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1014 [2021-12-21 11:13:27,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:27,988 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:27,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 11:13:27,988 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1553755039, now seen corresponding path program 1 times [2021-12-21 11:13:27,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:27,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968826347] [2021-12-21 11:13:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:27,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 1295 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-12-21 11:13:28,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968826347] [2021-12-21 11:13:28,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968826347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:28,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:28,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:28,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584368060] [2021-12-21 11:13:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:28,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:28,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:28,207 INFO L87 Difference]: Start difference. First operand 18030 states and 18542 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:29,076 INFO L93 Difference]: Finished difference Result 30641 states and 31385 transitions. [2021-12-21 11:13:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1013 [2021-12-21 11:13:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:29,101 INFO L225 Difference]: With dead ends: 30641 [2021-12-21 11:13:29,102 INFO L226 Difference]: Without dead ends: 12912 [2021-12-21 11:13:29,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:29,111 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 323 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 70 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-12-21 11:13:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 11409. [2021-12-21 11:13:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 1.0170056100981768) internal successors, (11602), 11408 states have internal predecessors, (11602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 11602 transitions. [2021-12-21 11:13:29,212 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 11602 transitions. Word has length 1013 [2021-12-21 11:13:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:29,213 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 11602 transitions. [2021-12-21 11:13:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 11602 transitions. [2021-12-21 11:13:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1167 [2021-12-21 11:13:29,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:29,228 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:29,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 11:13:29,228 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1574290295, now seen corresponding path program 1 times [2021-12-21 11:13:29,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:29,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26277045] [2021-12-21 11:13:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:29,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 1488 proven. 187 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-12-21 11:13:29,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26277045] [2021-12-21 11:13:29,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26277045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765661417] [2021-12-21 11:13:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:29,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:29,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:29,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 11:13:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:13:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 999 proven. 53 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2021-12-21 11:13:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates...