./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem13_label56.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 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:42:08,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:42:08,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:42:08,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:42:08,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:42:08,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:42:08,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:42:08,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:42:08,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:42:08,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:42:08,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:42:08,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:42:08,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:42:08,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:42:08,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:42:08,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:42:08,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:42:08,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:42:08,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:42:08,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:42:08,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:42:08,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:42:08,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:42:08,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:42:08,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:42:08,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:42:08,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:42:08,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:42:08,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:42:08,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:42:08,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:42:08,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:42:08,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:42:08,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:42:08,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:42:08,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:42:08,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:42:08,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:42:08,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:42:08,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:42:08,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:42:08,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:42:08,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:42:08,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:42:08,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:42:08,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:42:08,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:42:08,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:42:08,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:42:08,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:42:08,852 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:42:08,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:42:08,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:42:08,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:42:08,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:42:08,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:42:08,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:42:08,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:42:08,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:42:08,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:42:08,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:42:08,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:08,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:42:08,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:42:08,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:42:08,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:42:08,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:42:08,858 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:42:08,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:42:08,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:42:08,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:42:08,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc [2021-12-17 04:42:09,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:42:09,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:42:09,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:42:09,142 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:42:09,143 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:42:09,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-12-17 04:42:09,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a7607f/64c0b1ce622e4ae99272dd21534e1ca0/FLAG5467e0cd7 [2021-12-17 04:42:09,919 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:42:09,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-12-17 04:42:09,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a7607f/64c0b1ce622e4ae99272dd21534e1ca0/FLAG5467e0cd7 [2021-12-17 04:42:10,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a7607f/64c0b1ce622e4ae99272dd21534e1ca0 [2021-12-17 04:42:10,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:42:10,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:42:10,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:10,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:42:10,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:42:10,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:10" (1/1) ... [2021-12-17 04:42:10,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b178d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:10, skipping insertion in model container [2021-12-17 04:42:10,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:10" (1/1) ... [2021-12-17 04:42:10,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:42:10,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:42:10,676 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/Problem13_label56.c[7559,7572] [2021-12-17 04:42:11,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:11,292 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:42:11,318 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/Problem13_label56.c[7559,7572] [2021-12-17 04:42:11,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:11,673 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:42:11,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11 WrapperNode [2021-12-17 04:42:11,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:11,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:11,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:42:11,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:42:11,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:11,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,163 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:42:12,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:12,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:42:12,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:42:12,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:42:12,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:42:12,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:42:12,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:42:12,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:42:12,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (1/1) ... [2021-12-17 04:42:12,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:12,744 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) [2021-12-17 04:42:12,759 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 [2021-12-17 04:42:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:42:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:42:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:42:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:42:12,850 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:42:12,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:42:16,313 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:42:16,344 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:42:16,344 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:42:16,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:16 BoogieIcfgContainer [2021-12-17 04:42:16,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:42:16,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:42:16,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:42:16,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:42:16,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:42:10" (1/3) ... [2021-12-17 04:42:16,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c9cc30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:16, skipping insertion in model container [2021-12-17 04:42:16,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:11" (2/3) ... [2021-12-17 04:42:16,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c9cc30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:16, skipping insertion in model container [2021-12-17 04:42:16,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:16" (3/3) ... [2021-12-17 04:42:16,356 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label56.c [2021-12-17 04:42:16,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:42:16,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:42:16,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:42:16,416 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 [2021-12-17 04:42:16,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:42:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-12-17 04:42:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 04:42:16,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:16,460 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] [2021-12-17 04:42:16,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2021-12-17 04:42:16,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992008759] [2021-12-17 04:42:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:16,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:16,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992008759] [2021-12-17 04:42:16,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992008759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:16,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:16,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:16,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122224547] [2021-12-17 04:42:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:16,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:16,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:16,838 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-17 04:42:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:22,438 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-17 04:42:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-12-17 04:42:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:22,459 INFO L225 Difference]: With dead ends: 3829 [2021-12-17 04:42:22,459 INFO L226 Difference]: Without dead ends: 2664 [2021-12-17 04:42:22,465 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 [2021-12-17 04:42:22,467 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2684 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:22,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2684 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:42:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-17 04:42:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-17 04:42:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 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) [2021-12-17 04:42:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-17 04:42:22,588 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 53 [2021-12-17 04:42:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:22,589 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-17 04:42:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-17 04:42:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-17 04:42:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 04:42:22,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:22,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:42:22,601 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash 368878655, now seen corresponding path program 1 times [2021-12-17 04:42:22,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:22,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443425470] [2021-12-17 04:42:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:22,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:22,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443425470] [2021-12-17 04:42:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443425470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:22,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:22,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:22,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619887650] [2021-12-17 04:42:22,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:22,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:22,794 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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) [2021-12-17 04:42:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:28,198 INFO L93 Difference]: Finished difference Result 7866 states and 12670 transitions. [2021-12-17 04:42:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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 178 [2021-12-17 04:42:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:28,216 INFO L225 Difference]: With dead ends: 7866 [2021-12-17 04:42:28,217 INFO L226 Difference]: Without dead ends: 5992 [2021-12-17 04:42:28,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:28,225 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 1628 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 6335 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 7165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 6335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:28,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 1193 Invalid, 7165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 6335 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:42:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2021-12-17 04:42:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 5859. [2021-12-17 04:42:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4453738477296005) internal successors, (8467), 5858 states have internal predecessors, (8467), 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) [2021-12-17 04:42:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8467 transitions. [2021-12-17 04:42:28,311 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8467 transitions. Word has length 178 [2021-12-17 04:42:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8467 transitions. [2021-12-17 04:42:28,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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) [2021-12-17 04:42:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8467 transitions. [2021-12-17 04:42:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-17 04:42:28,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:28,319 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, 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] [2021-12-17 04:42:28,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:42:28,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash 813209171, now seen corresponding path program 1 times [2021-12-17 04:42:28,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:28,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706951621] [2021-12-17 04:42:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:28,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:42:28,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706951621] [2021-12-17 04:42:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706951621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:28,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:28,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:28,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274530464] [2021-12-17 04:42:28,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:28,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:28,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:28,508 INFO L87 Difference]: Start difference. First operand 5859 states and 8467 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-12-17 04:42:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:31,615 INFO L93 Difference]: Finished difference Result 15687 states and 23393 transitions. [2021-12-17 04:42:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 220 [2021-12-17 04:42:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:31,644 INFO L225 Difference]: With dead ends: 15687 [2021-12-17 04:42:31,644 INFO L226 Difference]: Without dead ends: 10617 [2021-12-17 04:42:31,649 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 [2021-12-17 04:42:31,655 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:31,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:42:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2021-12-17 04:42:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2021-12-17 04:42:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3553313849344772) internal successors, (14376), 10607 states have internal predecessors, (14376), 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) [2021-12-17 04:42:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14376 transitions. [2021-12-17 04:42:31,804 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14376 transitions. Word has length 220 [2021-12-17 04:42:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:31,805 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14376 transitions. [2021-12-17 04:42:31,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-12-17 04:42:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14376 transitions. [2021-12-17 04:42:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-17 04:42:31,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:31,809 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:42:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:42:31,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -558965962, now seen corresponding path program 1 times [2021-12-17 04:42:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862371989] [2021-12-17 04:42:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:31,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:42:31,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862371989] [2021-12-17 04:42:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862371989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:31,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:31,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:31,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313578542] [2021-12-17 04:42:31,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:31,904 INFO L87 Difference]: Start difference. First operand 10608 states and 14376 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-12-17 04:42:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:34,415 INFO L93 Difference]: Finished difference Result 29087 states and 40058 transitions. [2021-12-17 04:42:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:34,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 234 [2021-12-17 04:42:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:34,461 INFO L225 Difference]: With dead ends: 29087 [2021-12-17 04:42:34,462 INFO L226 Difference]: Without dead ends: 19268 [2021-12-17 04:42:34,478 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 [2021-12-17 04:42:34,479 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:34,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 987 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:42:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-12-17 04:42:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 18479. [2021-12-17 04:42:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18479 states, 18478 states have (on average 1.2594977811451455) internal successors, (23273), 18478 states have internal predecessors, (23273), 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) [2021-12-17 04:42:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18479 states to 18479 states and 23273 transitions. [2021-12-17 04:42:34,720 INFO L78 Accepts]: Start accepts. Automaton has 18479 states and 23273 transitions. Word has length 234 [2021-12-17 04:42:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:34,721 INFO L470 AbstractCegarLoop]: Abstraction has 18479 states and 23273 transitions. [2021-12-17 04:42:34,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-12-17 04:42:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 18479 states and 23273 transitions. [2021-12-17 04:42:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-17 04:42:34,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:34,724 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:42:34,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:42:34,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -633111202, now seen corresponding path program 1 times [2021-12-17 04:42:34,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317063871] [2021-12-17 04:42:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:34,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:34,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317063871] [2021-12-17 04:42:34,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317063871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:34,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:34,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:34,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015406137] [2021-12-17 04:42:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:34,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:34,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:34,820 INFO L87 Difference]: Start difference. First operand 18479 states and 23273 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-12-17 04:42:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:40,788 INFO L93 Difference]: Finished difference Result 48973 states and 63007 transitions. [2021-12-17 04:42:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 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 250 [2021-12-17 04:42:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:40,837 INFO L225 Difference]: With dead ends: 48973 [2021-12-17 04:42:40,838 INFO L226 Difference]: Without dead ends: 31283 [2021-12-17 04:42:40,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:40,855 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 1721 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 6823 mSolverCounterSat, 1073 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 7896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1073 IncrementalHoareTripleChecker+Valid, 6823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1721 Valid, 880 Invalid, 7896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1073 Valid, 6823 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 04:42:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31283 states. [2021-12-17 04:42:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31283 to 30374. [2021-12-17 04:42:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30374 states, 30373 states have (on average 1.2605274421361077) internal successors, (38286), 30373 states have internal predecessors, (38286), 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) [2021-12-17 04:42:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30374 states to 30374 states and 38286 transitions. [2021-12-17 04:42:41,198 INFO L78 Accepts]: Start accepts. Automaton has 30374 states and 38286 transitions. Word has length 250 [2021-12-17 04:42:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:41,199 INFO L470 AbstractCegarLoop]: Abstraction has 30374 states and 38286 transitions. [2021-12-17 04:42:41,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-12-17 04:42:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30374 states and 38286 transitions. [2021-12-17 04:42:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-17 04:42:41,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:41,204 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:42:41,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:42:41,205 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash -483948489, now seen corresponding path program 1 times [2021-12-17 04:42:41,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173379380] [2021-12-17 04:42:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:41,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:41,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173379380] [2021-12-17 04:42:41,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173379380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:41,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:41,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:41,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076063768] [2021-12-17 04:42:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:41,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:41,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:41,289 INFO L87 Difference]: Start difference. First operand 30374 states and 38286 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-12-17 04:42:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:44,808 INFO L93 Difference]: Finished difference Result 89095 states and 112689 transitions. [2021-12-17 04:42:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 260 [2021-12-17 04:42:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:44,891 INFO L225 Difference]: With dead ends: 89095 [2021-12-17 04:42:44,892 INFO L226 Difference]: Without dead ends: 59510 [2021-12-17 04:42:44,926 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 [2021-12-17 04:42:44,927 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 817 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:44,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 1013 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:42:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59510 states. [2021-12-17 04:42:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59510 to 57136. [2021-12-17 04:42:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57136 states, 57135 states have (on average 1.2027128730200403) internal successors, (68717), 57135 states have internal predecessors, (68717), 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) [2021-12-17 04:42:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57136 states to 57136 states and 68717 transitions. [2021-12-17 04:42:45,809 INFO L78 Accepts]: Start accepts. Automaton has 57136 states and 68717 transitions. Word has length 260 [2021-12-17 04:42:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:45,811 INFO L470 AbstractCegarLoop]: Abstraction has 57136 states and 68717 transitions. [2021-12-17 04:42:45,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-12-17 04:42:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 57136 states and 68717 transitions. [2021-12-17 04:42:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-17 04:42:45,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:45,840 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:42:45,841 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1008056709, now seen corresponding path program 1 times [2021-12-17 04:42:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778936926] [2021-12-17 04:42:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:45,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 04:42:45,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778936926] [2021-12-17 04:42:45,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778936926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:45,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214141861] [2021-12-17 04:42:45,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:45,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:45,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:45,951 INFO L87 Difference]: Start difference. First operand 57136 states and 68717 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-12-17 04:42:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:49,282 INFO L93 Difference]: Finished difference Result 133985 states and 160221 transitions. [2021-12-17 04:42:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 350 [2021-12-17 04:42:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:49,438 INFO L225 Difference]: With dead ends: 133985 [2021-12-17 04:42:49,438 INFO L226 Difference]: Without dead ends: 77638 [2021-12-17 04:42:49,465 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 [2021-12-17 04:42:49,467 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:49,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1994 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77638 states. [2021-12-17 04:42:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77638 to 77602. [2021-12-17 04:42:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77602 states, 77601 states have (on average 1.1734127137536887) internal successors, (91058), 77601 states have internal predecessors, (91058), 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) [2021-12-17 04:42:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77602 states to 77602 states and 91058 transitions. [2021-12-17 04:42:50,471 INFO L78 Accepts]: Start accepts. Automaton has 77602 states and 91058 transitions. Word has length 350 [2021-12-17 04:42:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:50,471 INFO L470 AbstractCegarLoop]: Abstraction has 77602 states and 91058 transitions. [2021-12-17 04:42:50,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-12-17 04:42:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 77602 states and 91058 transitions. [2021-12-17 04:42:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-17 04:42:50,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:50,479 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:50,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:42:50,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 292668930, now seen corresponding path program 1 times [2021-12-17 04:42:50,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254786647] [2021-12-17 04:42:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:50,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 04:42:50,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254786647] [2021-12-17 04:42:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254786647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:50,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:50,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:50,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373984394] [2021-12-17 04:42:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:50,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:50,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:50,572 INFO L87 Difference]: Start difference. First operand 77602 states and 91058 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-12-17 04:42:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:53,374 INFO L93 Difference]: Finished difference Result 160690 states and 187547 transitions. [2021-12-17 04:42:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 370 [2021-12-17 04:42:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:53,584 INFO L225 Difference]: With dead ends: 160690 [2021-12-17 04:42:53,584 INFO L226 Difference]: Without dead ends: 80724 [2021-12-17 04:42:53,604 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 [2021-12-17 04:42:53,605 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1036 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:53,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1645 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:42:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-17 04:42:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 75989. [2021-12-17 04:42:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75989 states, 75988 states have (on average 1.1157814391746066) internal successors, (84786), 75988 states have internal predecessors, (84786), 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) [2021-12-17 04:42:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75989 states to 75989 states and 84786 transitions. [2021-12-17 04:42:54,677 INFO L78 Accepts]: Start accepts. Automaton has 75989 states and 84786 transitions. Word has length 370 [2021-12-17 04:42:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:54,678 INFO L470 AbstractCegarLoop]: Abstraction has 75989 states and 84786 transitions. [2021-12-17 04:42:54,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-12-17 04:42:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75989 states and 84786 transitions. [2021-12-17 04:42:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-17 04:42:54,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:54,685 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:54,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:42:54,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash -305686717, now seen corresponding path program 1 times [2021-12-17 04:42:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:54,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181681629] [2021-12-17 04:42:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:54,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 273 proven. 110 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 04:42:54,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181681629] [2021-12-17 04:42:54,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181681629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308824032] [2021-12-17 04:42:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:54,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:54,908 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) [2021-12-17 04:42:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:42:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:55,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-17 04:42:55,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:55,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308824032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:55,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:55,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:42:55,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556581905] [2021-12-17 04:42:55,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:55,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:55,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:55,749 INFO L87 Difference]: Start difference. First operand 75989 states and 84786 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-17 04:42:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:58,321 INFO L93 Difference]: Finished difference Result 149612 states and 166903 transitions. [2021-12-17 04:42:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 379 [2021-12-17 04:42:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:58,444 INFO L225 Difference]: With dead ends: 149612 [2021-12-17 04:42:58,444 INFO L226 Difference]: Without dead ends: 74412 [2021-12-17 04:42:58,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:58,482 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:58,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 04:42:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74412 states. [2021-12-17 04:42:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74412 to 74411. [2021-12-17 04:42:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74411 states, 74410 states have (on average 1.0907136137615911) internal successors, (81160), 74410 states have internal predecessors, (81160), 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) [2021-12-17 04:42:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74411 states to 74411 states and 81160 transitions. [2021-12-17 04:42:59,523 INFO L78 Accepts]: Start accepts. Automaton has 74411 states and 81160 transitions. Word has length 379 [2021-12-17 04:42:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:59,524 INFO L470 AbstractCegarLoop]: Abstraction has 74411 states and 81160 transitions. [2021-12-17 04:42:59,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-17 04:42:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 74411 states and 81160 transitions. [2021-12-17 04:42:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-17 04:42:59,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:59,531 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:59,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:42:59,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:59,748 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1025114430, now seen corresponding path program 1 times [2021-12-17 04:42:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937523209] [2021-12-17 04:42:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:59,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 04:42:59,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937523209] [2021-12-17 04:42:59,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937523209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:59,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:59,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:59,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065681360] [2021-12-17 04:42:59,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:59,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:59,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:59,859 INFO L87 Difference]: Start difference. First operand 74411 states and 81160 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-12-17 04:43:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:03,271 INFO L93 Difference]: Finished difference Result 170869 states and 187655 transitions. [2021-12-17 04:43:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 409 [2021-12-17 04:43:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:03,397 INFO L225 Difference]: With dead ends: 170869 [2021-12-17 04:43:03,397 INFO L226 Difference]: Without dead ends: 97247 [2021-12-17 04:43:03,425 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 [2021-12-17 04:43:03,426 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 893 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:03,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 858 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:43:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97247 states. [2021-12-17 04:43:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97247 to 94870. [2021-12-17 04:43:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94870 states, 94869 states have (on average 1.0945725157849244) internal successors, (103841), 94869 states have internal predecessors, (103841), 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) [2021-12-17 04:43:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94870 states to 94870 states and 103841 transitions. [2021-12-17 04:43:04,457 INFO L78 Accepts]: Start accepts. Automaton has 94870 states and 103841 transitions. Word has length 409 [2021-12-17 04:43:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:04,458 INFO L470 AbstractCegarLoop]: Abstraction has 94870 states and 103841 transitions. [2021-12-17 04:43:04,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-12-17 04:43:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 94870 states and 103841 transitions. [2021-12-17 04:43:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-12-17 04:43:04,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:04,465 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:04,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:43:04,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash -916683299, now seen corresponding path program 1 times [2021-12-17 04:43:04,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:04,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560866456] [2021-12-17 04:43:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:04,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:43:04,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:04,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560866456] [2021-12-17 04:43:04,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560866456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:04,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:04,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:04,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500524691] [2021-12-17 04:43:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:04,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:04,751 INFO L87 Difference]: Start difference. First operand 94870 states and 103841 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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) [2021-12-17 04:43:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:08,377 INFO L93 Difference]: Finished difference Result 209426 states and 230494 transitions. [2021-12-17 04:43:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 447 [2021-12-17 04:43:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:08,525 INFO L225 Difference]: With dead ends: 209426 [2021-12-17 04:43:08,525 INFO L226 Difference]: Without dead ends: 112984 [2021-12-17 04:43:08,576 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 [2021-12-17 04:43:08,577 INFO L933 BasicCegarLoop]: 1737 mSDtfsCounter, 786 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:08,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1881 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 2518 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112984 states. [2021-12-17 04:43:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112984 to 112967. [2021-12-17 04:43:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112967 states, 112966 states have (on average 1.0819007488978984) internal successors, (122218), 112966 states have internal predecessors, (122218), 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) [2021-12-17 04:43:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112967 states to 112967 states and 122218 transitions. [2021-12-17 04:43:10,032 INFO L78 Accepts]: Start accepts. Automaton has 112967 states and 122218 transitions. Word has length 447 [2021-12-17 04:43:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:10,032 INFO L470 AbstractCegarLoop]: Abstraction has 112967 states and 122218 transitions. [2021-12-17 04:43:10,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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) [2021-12-17 04:43:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 112967 states and 122218 transitions. [2021-12-17 04:43:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-17 04:43:10,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:10,045 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, 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, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:10,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:43:10,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash -762226031, now seen corresponding path program 1 times [2021-12-17 04:43:10,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:10,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183966221] [2021-12-17 04:43:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:10,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 869 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-17 04:43:10,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183966221] [2021-12-17 04:43:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183966221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:10,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:10,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:10,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135121277] [2021-12-17 04:43:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:10,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:10,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:10,150 INFO L87 Difference]: Start difference. First operand 112967 states and 122218 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2021-12-17 04:43:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:13,440 INFO L93 Difference]: Finished difference Result 226725 states and 245236 transitions. [2021-12-17 04:43:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 518 [2021-12-17 04:43:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:13,615 INFO L225 Difference]: With dead ends: 226725 [2021-12-17 04:43:13,615 INFO L226 Difference]: Without dead ends: 114547 [2021-12-17 04:43:13,684 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 [2021-12-17 04:43:13,685 INFO L933 BasicCegarLoop]: 1398 mSDtfsCounter, 936 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:13,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1481 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:43:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114547 states. [2021-12-17 04:43:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114547 to 112961. [2021-12-17 04:43:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112961 states, 112960 states have (on average 1.0631639518413598) internal successors, (120095), 112960 states have internal predecessors, (120095), 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) [2021-12-17 04:43:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112961 states to 112961 states and 120095 transitions. [2021-12-17 04:43:15,058 INFO L78 Accepts]: Start accepts. Automaton has 112961 states and 120095 transitions. Word has length 518 [2021-12-17 04:43:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 112961 states and 120095 transitions. [2021-12-17 04:43:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2021-12-17 04:43:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 112961 states and 120095 transitions. [2021-12-17 04:43:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-17 04:43:15,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:15,074 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, 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, 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] [2021-12-17 04:43:15,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:43:15,074 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 471081370, now seen corresponding path program 1 times [2021-12-17 04:43:15,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:15,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757498078] [2021-12-17 04:43:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:15,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 749 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-12-17 04:43:15,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757498078] [2021-12-17 04:43:15,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757498078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:15,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:15,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728451893] [2021-12-17 04:43:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:15,522 INFO L87 Difference]: Start difference. First operand 112961 states and 120095 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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) [2021-12-17 04:43:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:18,602 INFO L93 Difference]: Finished difference Result 226731 states and 241019 transitions. [2021-12-17 04:43:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:18,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 537 [2021-12-17 04:43:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:18,728 INFO L225 Difference]: With dead ends: 226731 [2021-12-17 04:43:18,728 INFO L226 Difference]: Without dead ends: 114559 [2021-12-17 04:43:18,764 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 [2021-12-17 04:43:18,765 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 815 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:18,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1043 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:43:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114559 states. [2021-12-17 04:43:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114559 to 112173. [2021-12-17 04:43:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112173 states, 112172 states have (on average 1.0570017473166209) internal successors, (118566), 112172 states have internal predecessors, (118566), 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) [2021-12-17 04:43:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112173 states to 112173 states and 118566 transitions. [2021-12-17 04:43:20,309 INFO L78 Accepts]: Start accepts. Automaton has 112173 states and 118566 transitions. Word has length 537 [2021-12-17 04:43:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:20,310 INFO L470 AbstractCegarLoop]: Abstraction has 112173 states and 118566 transitions. [2021-12-17 04:43:20,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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) [2021-12-17 04:43:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 112173 states and 118566 transitions. [2021-12-17 04:43:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-12-17 04:43:20,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:20,341 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, 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, 3, 3, 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] [2021-12-17 04:43:20,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:43:20,342 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1398608766, now seen corresponding path program 1 times [2021-12-17 04:43:20,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:20,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911457432] [2021-12-17 04:43:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:20,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-12-17 04:43:20,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:20,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911457432] [2021-12-17 04:43:20,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911457432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:20,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:20,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:20,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711584754] [2021-12-17 04:43:20,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:20,501 INFO L87 Difference]: Start difference. First operand 112173 states and 118566 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2021-12-17 04:43:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:24,788 INFO L93 Difference]: Finished difference Result 260671 states and 275678 transitions. [2021-12-17 04:43:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 559 [2021-12-17 04:43:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:24,950 INFO L225 Difference]: With dead ends: 260671 [2021-12-17 04:43:24,950 INFO L226 Difference]: Without dead ends: 149287 [2021-12-17 04:43:25,003 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 [2021-12-17 04:43:25,004 INFO L933 BasicCegarLoop]: 1748 mSDtfsCounter, 883 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 3622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:25,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1872 Invalid, 3622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 04:43:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149287 states. [2021-12-17 04:43:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149287 to 146834. [2021-12-17 04:43:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146834 states, 146833 states have (on average 1.0561522273603345) internal successors, (155078), 146833 states have internal predecessors, (155078), 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) [2021-12-17 04:43:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146834 states to 146834 states and 155078 transitions. [2021-12-17 04:43:26,871 INFO L78 Accepts]: Start accepts. Automaton has 146834 states and 155078 transitions. Word has length 559 [2021-12-17 04:43:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:26,871 INFO L470 AbstractCegarLoop]: Abstraction has 146834 states and 155078 transitions. [2021-12-17 04:43:26,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2021-12-17 04:43:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 146834 states and 155078 transitions. [2021-12-17 04:43:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-12-17 04:43:26,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:26,891 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:43:26,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:43:26,891 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -803372421, now seen corresponding path program 1 times [2021-12-17 04:43:26,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500786019] [2021-12-17 04:43:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2021-12-17 04:43:27,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500786019] [2021-12-17 04:43:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500786019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:27,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:27,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:27,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573262289] [2021-12-17 04:43:27,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:27,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:27,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:27,040 INFO L87 Difference]: Start difference. First operand 146834 states and 155078 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-17 04:43:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:32,018 INFO L93 Difference]: Finished difference Result 327646 states and 346304 transitions. [2021-12-17 04:43:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 607 [2021-12-17 04:43:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:32,330 INFO L225 Difference]: With dead ends: 327646 [2021-12-17 04:43:32,330 INFO L226 Difference]: Without dead ends: 181601 [2021-12-17 04:43:32,404 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 [2021-12-17 04:43:32,405 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 908 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 3569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:32,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 1809 Invalid, 3569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 04:43:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181601 states. [2021-12-17 04:43:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181601 to 147652. [2021-12-17 04:43:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147652 states, 147651 states have (on average 1.055935957087998) internal successors, (155910), 147651 states have internal predecessors, (155910), 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) [2021-12-17 04:43:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147652 states to 147652 states and 155910 transitions. [2021-12-17 04:43:34,469 INFO L78 Accepts]: Start accepts. Automaton has 147652 states and 155910 transitions. Word has length 607 [2021-12-17 04:43:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:34,469 INFO L470 AbstractCegarLoop]: Abstraction has 147652 states and 155910 transitions. [2021-12-17 04:43:34,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-17 04:43:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 147652 states and 155910 transitions. [2021-12-17 04:43:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2021-12-17 04:43:34,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:34,490 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:34,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:43:34,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash -630986981, now seen corresponding path program 1 times [2021-12-17 04:43:34,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:34,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796765492] [2021-12-17 04:43:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:34,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 04:43:34,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796765492] [2021-12-17 04:43:34,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796765492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:34,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:34,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:34,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976206529] [2021-12-17 04:43:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:34,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:34,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:34,637 INFO L87 Difference]: Start difference. First operand 147652 states and 155910 transitions. Second operand has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 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) [2021-12-17 04:43:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:38,563 INFO L93 Difference]: Finished difference Result 304747 states and 321666 transitions. [2021-12-17 04:43:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 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 614 [2021-12-17 04:43:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:38,811 INFO L225 Difference]: With dead ends: 304747 [2021-12-17 04:43:38,812 INFO L226 Difference]: Without dead ends: 155521 [2021-12-17 04:43:38,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:38,892 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1462 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 4059 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 4059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:38,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 981 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 4059 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:43:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155521 states. [2021-12-17 04:43:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155521 to 153946. [2021-12-17 04:43:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153946 states, 153945 states have (on average 1.051427457858326) internal successors, (161862), 153945 states have internal predecessors, (161862), 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) [2021-12-17 04:43:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153946 states to 153946 states and 161862 transitions. [2021-12-17 04:43:40,860 INFO L78 Accepts]: Start accepts. Automaton has 153946 states and 161862 transitions. Word has length 614 [2021-12-17 04:43:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:40,860 INFO L470 AbstractCegarLoop]: Abstraction has 153946 states and 161862 transitions. [2021-12-17 04:43:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 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) [2021-12-17 04:43:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 153946 states and 161862 transitions. [2021-12-17 04:43:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-12-17 04:43:40,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:40,880 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:40,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:43:40,881 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 148615196, now seen corresponding path program 1 times [2021-12-17 04:43:40,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:40,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702766190] [2021-12-17 04:43:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:40,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 04:43:41,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702766190] [2021-12-17 04:43:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702766190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:41,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:41,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:41,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831295101] [2021-12-17 04:43:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:41,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:41,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:41,030 INFO L87 Difference]: Start difference. First operand 153946 states and 161862 transitions. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 3 states have internal predecessors, (537), 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) [2021-12-17 04:43:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:46,746 INFO L93 Difference]: Finished difference Result 393718 states and 414696 transitions. [2021-12-17 04:43:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 3 states have internal predecessors, (537), 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 674 [2021-12-17 04:43:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:47,150 INFO L225 Difference]: With dead ends: 393718 [2021-12-17 04:43:47,150 INFO L226 Difference]: Without dead ends: 240561 [2021-12-17 04:43:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:47,240 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 2183 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:47,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2183 Valid, 765 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 04:43:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240561 states.