./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.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 5e8b15ed099b1f7cf4258894df881e9cd3bcfa356a0bdf33a8c3af6ce17b2dcd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:03:49,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:03:49,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:03:49,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:03:49,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:03:49,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:03:49,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:03:49,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:03:49,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:03:49,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:03:49,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:03:49,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:03:49,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:03:49,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:03:49,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:03:49,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:03:49,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:03:49,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:03:49,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:03:49,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:03:49,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:03:49,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:03:49,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:03:49,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:03:49,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:03:49,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:03:49,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:03:49,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:03:49,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:03:49,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:03:49,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:03:49,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:03:49,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:03:49,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:03:49,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:03:49,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:03:49,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:03:49,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:03:49,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:03:49,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:03:49,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:03:49,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:03:49,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:03:49,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:03:49,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:03:49,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:03:49,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:03:49,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:03:49,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:03:49,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:03:49,736 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:03:49,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:03:49,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:03:49,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:03:49,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:03:49,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:03:49,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:03:49,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:03:49,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:03:49,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:03:49,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e8b15ed099b1f7cf4258894df881e9cd3bcfa356a0bdf33a8c3af6ce17b2dcd [2021-12-14 16:03:49,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:03:49,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:03:49,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:03:49,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:03:49,950 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:03:49,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2021-12-14 16:03:50,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e9be751/25ad42b9a3cb4c54a3b5b186409847ab/FLAG61e9e1aff [2021-12-14 16:03:50,648 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:03:50,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2021-12-14 16:03:50,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e9be751/25ad42b9a3cb4c54a3b5b186409847ab/FLAG61e9e1aff [2021-12-14 16:03:51,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e9be751/25ad42b9a3cb4c54a3b5b186409847ab [2021-12-14 16:03:51,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:03:51,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:03:51,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:03:51,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:03:51,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:03:51,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:51" (1/1) ... [2021-12-14 16:03:51,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46587f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:51, skipping insertion in model container [2021-12-14 16:03:51,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:51" (1/1) ... [2021-12-14 16:03:51,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:03:51,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:03:51,452 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[8616,8629] [2021-12-14 16:03:51,473 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[9458,9471] [2021-12-14 16:03:52,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:03:52,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:03:52,143 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[8616,8629] [2021-12-14 16:03:52,145 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[9458,9471] [2021-12-14 16:03:52,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:03:52,456 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:03:52,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52 WrapperNode [2021-12-14 16:03:52,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:03:52,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:03:52,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:03:52,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:03:52,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:52,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:52,764 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5031 [2021-12-14 16:03:52,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:03:52,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:03:52,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:03:52,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:03:52,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:52,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:52,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:52,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:53,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:53,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:53,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:53,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:03:53,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:03:53,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:03:53,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:03:53,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (1/1) ... [2021-12-14 16:03:53,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:03:53,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:03:53,195 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) [2021-12-14 16:03:53,255 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 [2021-12-14 16:03:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:03:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:03:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:03:53,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:03:53,409 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:03:53,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:03:56,219 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:03:56,229 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:03:56,229 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:03:56,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:56 BoogieIcfgContainer [2021-12-14 16:03:56,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:03:56,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:03:56,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:03:56,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:03:56,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:03:51" (1/3) ... [2021-12-14 16:03:56,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4a1874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:56, skipping insertion in model container [2021-12-14 16:03:56,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:52" (2/3) ... [2021-12-14 16:03:56,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4a1874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:56, skipping insertion in model container [2021-12-14 16:03:56,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:56" (3/3) ... [2021-12-14 16:03:56,238 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2021-12-14 16:03:56,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:03:56,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:03:56,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:03:56,279 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 [2021-12-14 16:03:56,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:03:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 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) [2021-12-14 16:03:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 16:03:56,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:56,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:03:56,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2128631676, now seen corresponding path program 1 times [2021-12-14 16:03:56,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835860685] [2021-12-14 16:03:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:56,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:56,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:56,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835860685] [2021-12-14 16:03:56,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835860685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:56,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:56,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:03:56,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114061394] [2021-12-14 16:03:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:56,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:03:56,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:03:56,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:03:56,450 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-14 16:03:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:03:59,214 INFO L93 Difference]: Finished difference Result 2512 states and 4834 transitions. [2021-12-14 16:03:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:03:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-14 16:03:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:03:59,231 INFO L225 Difference]: With dead ends: 2512 [2021-12-14 16:03:59,232 INFO L226 Difference]: Without dead ends: 1578 [2021-12-14 16:03:59,236 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 [2021-12-14 16:03:59,239 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 1015 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:03:59,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 282 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:03:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-12-14 16:03:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2021-12-14 16:03:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.8394670050761421) internal successors, (2899), 1577 states have internal predecessors, (2899), 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) [2021-12-14 16:03:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2899 transitions. [2021-12-14 16:03:59,313 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2899 transitions. Word has length 7 [2021-12-14 16:03:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:03:59,315 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2899 transitions. [2021-12-14 16:03:59,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-14 16:03:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2899 transitions. [2021-12-14 16:03:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 16:03:59,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:59,317 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] [2021-12-14 16:03:59,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:03:59,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-14 16:03:59,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:59,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019526602] [2021-12-14 16:03:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:59,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019526602] [2021-12-14 16:03:59,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019526602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:59,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:59,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:03:59,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061711771] [2021-12-14 16:03:59,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:59,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:03:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:03:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:03:59,370 INFO L87 Difference]: Start difference. First operand 1578 states and 2899 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-14 16:03:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:03:59,481 INFO L93 Difference]: Finished difference Result 1670 states and 3041 transitions. [2021-12-14 16:03:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:03:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2021-12-14 16:03:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:03:59,487 INFO L225 Difference]: With dead ends: 1670 [2021-12-14 16:03:59,487 INFO L226 Difference]: Without dead ends: 1622 [2021-12-14 16:03:59,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:03:59,488 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:03:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:03:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-14 16:03:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2021-12-14 16:03:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.8248730964467006) internal successors, (2876), 1577 states have internal predecessors, (2876), 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) [2021-12-14 16:03:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2876 transitions. [2021-12-14 16:03:59,513 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2876 transitions. Word has length 30 [2021-12-14 16:03:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:03:59,513 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2876 transitions. [2021-12-14 16:03:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-14 16:03:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2876 transitions. [2021-12-14 16:03:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 16:03:59,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:59,515 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] [2021-12-14 16:03:59,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:03:59,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-14 16:03:59,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:59,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844824551] [2021-12-14 16:03:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:59,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:59,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844824551] [2021-12-14 16:03:59,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844824551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:59,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:59,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:03:59,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203016940] [2021-12-14 16:03:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:59,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:03:59,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:03:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:03:59,612 INFO L87 Difference]: Start difference. First operand 1578 states and 2876 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:03:59,636 INFO L93 Difference]: Finished difference Result 1660 states and 3004 transitions. [2021-12-14 16:03:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:03:59,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-14 16:03:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:03:59,641 INFO L225 Difference]: With dead ends: 1660 [2021-12-14 16:03:59,641 INFO L226 Difference]: Without dead ends: 1616 [2021-12-14 16:03:59,644 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 [2021-12-14 16:03:59,648 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:03:59,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:03:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-14 16:03:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2021-12-14 16:03:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.8194789081885856) internal successors, (2933), 1613 states have internal predecessors, (2933), 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) [2021-12-14 16:03:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2933 transitions. [2021-12-14 16:03:59,677 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2933 transitions. Word has length 52 [2021-12-14 16:03:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:03:59,677 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 2933 transitions. [2021-12-14 16:03:59,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2933 transitions. [2021-12-14 16:03:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 16:03:59,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:59,682 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] [2021-12-14 16:03:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:03:59,683 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-14 16:03:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002930705] [2021-12-14 16:03:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:59,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:59,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002930705] [2021-12-14 16:03:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002930705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:59,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:59,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:03:59,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739386971] [2021-12-14 16:03:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:03:59,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:03:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:03:59,765 INFO L87 Difference]: Start difference. First operand 1614 states and 2933 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:03:59,789 INFO L93 Difference]: Finished difference Result 1762 states and 3165 transitions. [2021-12-14 16:03:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:03:59,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-14 16:03:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:03:59,794 INFO L225 Difference]: With dead ends: 1762 [2021-12-14 16:03:59,794 INFO L226 Difference]: Without dead ends: 1682 [2021-12-14 16:03:59,795 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 [2021-12-14 16:03:59,796 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:03:59,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:03:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-14 16:03:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2021-12-14 16:03:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.8092967818831942) internal successors, (3036), 1679 states have internal predecessors, (3036), 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) [2021-12-14 16:03:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3036 transitions. [2021-12-14 16:03:59,822 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3036 transitions. Word has length 52 [2021-12-14 16:03:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:03:59,823 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 3036 transitions. [2021-12-14 16:03:59,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3036 transitions. [2021-12-14 16:03:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 16:03:59,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:59,824 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] [2021-12-14 16:03:59,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:03:59,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-14 16:03:59,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:59,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963171482] [2021-12-14 16:03:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:59,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:59,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963171482] [2021-12-14 16:03:59,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963171482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:59,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:59,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:03:59,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873509737] [2021-12-14 16:03:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:59,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:03:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:03:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:03:59,867 INFO L87 Difference]: Start difference. First operand 1680 states and 3036 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:03:59,890 INFO L93 Difference]: Finished difference Result 1948 states and 3454 transitions. [2021-12-14 16:03:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:03:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-14 16:03:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:03:59,896 INFO L225 Difference]: With dead ends: 1948 [2021-12-14 16:03:59,896 INFO L226 Difference]: Without dead ends: 1802 [2021-12-14 16:03:59,897 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 [2021-12-14 16:03:59,898 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:03:59,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:03:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-12-14 16:03:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2021-12-14 16:03:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.7908787541713014) internal successors, (3220), 1799 states have internal predecessors, (3220), 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) [2021-12-14 16:03:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3220 transitions. [2021-12-14 16:03:59,925 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3220 transitions. Word has length 52 [2021-12-14 16:03:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:03:59,925 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 3220 transitions. [2021-12-14 16:03:59,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:03:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3220 transitions. [2021-12-14 16:03:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 16:03:59,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:03:59,926 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] [2021-12-14 16:03:59,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:03:59,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:03:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:03:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-14 16:03:59,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:03:59,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678643628] [2021-12-14 16:03:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:03:59,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:03:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:03:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:03:59,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:03:59,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678643628] [2021-12-14 16:03:59,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678643628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:03:59,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:03:59,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:03:59,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589483432] [2021-12-14 16:03:59,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:03:59,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:03:59,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:03:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:03:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:03:59,985 INFO L87 Difference]: Start difference. First operand 1800 states and 3220 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:04:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:00,027 INFO L93 Difference]: Finished difference Result 2284 states and 3966 transitions. [2021-12-14 16:04:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:04:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-14 16:04:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:00,034 INFO L225 Difference]: With dead ends: 2284 [2021-12-14 16:04:00,047 INFO L226 Difference]: Without dead ends: 2018 [2021-12-14 16:04:00,048 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 [2021-12-14 16:04:00,049 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:00,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-14 16:04:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2021-12-14 16:04:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.759682224428997) internal successors, (3544), 2015 states have internal predecessors, (3544), 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) [2021-12-14 16:04:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3544 transitions. [2021-12-14 16:04:00,113 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3544 transitions. Word has length 52 [2021-12-14 16:04:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:00,114 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3544 transitions. [2021-12-14 16:04:00,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-14 16:04:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3544 transitions. [2021-12-14 16:04:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 16:04:00,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:00,115 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] [2021-12-14 16:04:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:04:00,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-14 16:04:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012843429] [2021-12-14 16:04:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:00,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:00,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012843429] [2021-12-14 16:04:00,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012843429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:00,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:00,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:00,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286793002] [2021-12-14 16:04:00,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:00,155 INFO L87 Difference]: Start difference. First operand 2016 states and 3544 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-14 16:04:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:00,316 INFO L93 Difference]: Finished difference Result 5872 states and 9440 transitions. [2021-12-14 16:04:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:04:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-12-14 16:04:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:00,332 INFO L225 Difference]: With dead ends: 5872 [2021-12-14 16:04:00,333 INFO L226 Difference]: Without dead ends: 5390 [2021-12-14 16:04:00,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:04:00,337 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:00,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-12-14 16:04:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2021-12-14 16:04:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.7032878909382518) internal successors, (4248), 2495 states have internal predecessors, (4248), 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) [2021-12-14 16:04:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4248 transitions. [2021-12-14 16:04:00,479 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4248 transitions. Word has length 52 [2021-12-14 16:04:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 4248 transitions. [2021-12-14 16:04:00,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-14 16:04:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4248 transitions. [2021-12-14 16:04:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 16:04:00,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:00,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:04:00,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-14 16:04:00,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:00,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318203921] [2021-12-14 16:04:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:00,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:00,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:00,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318203921] [2021-12-14 16:04:00,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318203921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:00,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:00,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:04:00,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870781047] [2021-12-14 16:04:00,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:00,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:04:00,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:04:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:04:00,524 INFO L87 Difference]: Start difference. First operand 2496 states and 4248 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-14 16:04:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:00,578 INFO L93 Difference]: Finished difference Result 3902 states and 6348 transitions. [2021-12-14 16:04:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:04:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-12-14 16:04:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:00,588 INFO L225 Difference]: With dead ends: 3902 [2021-12-14 16:04:00,588 INFO L226 Difference]: Without dead ends: 2940 [2021-12-14 16:04:00,591 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 [2021-12-14 16:04:00,591 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:00,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-14 16:04:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-14 16:04:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.6628065395095368) internal successors, (4882), 2937 states have internal predecessors, (4882), 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) [2021-12-14 16:04:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4882 transitions. [2021-12-14 16:04:00,664 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4882 transitions. Word has length 54 [2021-12-14 16:04:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:00,665 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4882 transitions. [2021-12-14 16:04:00,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-14 16:04:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4882 transitions. [2021-12-14 16:04:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 16:04:00,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:00,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:00,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:04:00,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-14 16:04:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:00,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451072061] [2021-12-14 16:04:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:00,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:00,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451072061] [2021-12-14 16:04:00,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451072061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:00,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:00,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075175641] [2021-12-14 16:04:00,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:00,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:00,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:00,802 INFO L87 Difference]: Start difference. First operand 2938 states and 4882 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-12-14 16:04:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:00,921 INFO L93 Difference]: Finished difference Result 4342 states and 6956 transitions. [2021-12-14 16:04:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:00,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 54 [2021-12-14 16:04:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:00,930 INFO L225 Difference]: With dead ends: 4342 [2021-12-14 16:04:00,930 INFO L226 Difference]: Without dead ends: 2940 [2021-12-14 16:04:00,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:04:00,934 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:00,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1726 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-14 16:04:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-14 16:04:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.654632152588556) internal successors, (4858), 2937 states have internal predecessors, (4858), 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) [2021-12-14 16:04:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4858 transitions. [2021-12-14 16:04:01,007 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4858 transitions. Word has length 54 [2021-12-14 16:04:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4858 transitions. [2021-12-14 16:04:01,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-12-14 16:04:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4858 transitions. [2021-12-14 16:04:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 16:04:01,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:01,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:01,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:04:01,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-14 16:04:01,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034782880] [2021-12-14 16:04:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:01,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034782880] [2021-12-14 16:04:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034782880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:01,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:01,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:04:01,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125974801] [2021-12-14 16:04:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:01,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:01,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:01,055 INFO L87 Difference]: Start difference. First operand 2938 states and 4858 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:01,170 INFO L93 Difference]: Finished difference Result 4340 states and 6907 transitions. [2021-12-14 16:04:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:01,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 16:04:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:01,179 INFO L225 Difference]: With dead ends: 4340 [2021-12-14 16:04:01,179 INFO L226 Difference]: Without dead ends: 2938 [2021-12-14 16:04:01,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:01,182 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:01,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-14 16:04:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-14 16:04:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.646457765667575) internal successors, (4834), 2937 states have internal predecessors, (4834), 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) [2021-12-14 16:04:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4834 transitions. [2021-12-14 16:04:01,320 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4834 transitions. Word has length 55 [2021-12-14 16:04:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:01,320 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4834 transitions. [2021-12-14 16:04:01,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4834 transitions. [2021-12-14 16:04:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 16:04:01,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:01,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:01,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:04:01,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-14 16:04:01,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289345040] [2021-12-14 16:04:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:01,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:01,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289345040] [2021-12-14 16:04:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289345040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:01,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:01,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:04:01,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33469724] [2021-12-14 16:04:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:01,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:01,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:01,371 INFO L87 Difference]: Start difference. First operand 2938 states and 4834 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:01,510 INFO L93 Difference]: Finished difference Result 4340 states and 6859 transitions. [2021-12-14 16:04:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 16:04:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:01,531 INFO L225 Difference]: With dead ends: 4340 [2021-12-14 16:04:01,531 INFO L226 Difference]: Without dead ends: 2938 [2021-12-14 16:04:01,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:01,534 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4576 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4576 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:01,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4576 Valid, 2993 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-14 16:04:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-14 16:04:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.638283378746594) internal successors, (4810), 2937 states have internal predecessors, (4810), 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) [2021-12-14 16:04:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4810 transitions. [2021-12-14 16:04:01,742 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4810 transitions. Word has length 55 [2021-12-14 16:04:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:01,743 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4810 transitions. [2021-12-14 16:04:01,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4810 transitions. [2021-12-14 16:04:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 16:04:01,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:01,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:01,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:04:01,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-14 16:04:01,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:01,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530958233] [2021-12-14 16:04:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:01,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530958233] [2021-12-14 16:04:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530958233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:01,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:01,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:04:01,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363037813] [2021-12-14 16:04:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:01,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:04:01,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:04:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:04:01,815 INFO L87 Difference]: Start difference. First operand 2938 states and 4810 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:02,034 INFO L93 Difference]: Finished difference Result 4169 states and 6508 transitions. [2021-12-14 16:04:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:04:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 16:04:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:02,042 INFO L225 Difference]: With dead ends: 4169 [2021-12-14 16:04:02,043 INFO L226 Difference]: Without dead ends: 4167 [2021-12-14 16:04:02,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:04:02,045 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:02,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-12-14 16:04:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2021-12-14 16:04:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.6154353562005277) internal successors, (4898), 3033 states have internal predecessors, (4898), 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) [2021-12-14 16:04:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4898 transitions. [2021-12-14 16:04:02,159 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4898 transitions. Word has length 55 [2021-12-14 16:04:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:02,159 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4898 transitions. [2021-12-14 16:04:02,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:04:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4898 transitions. [2021-12-14 16:04:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 16:04:02,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:02,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:02,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:04:02,161 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1698168162, now seen corresponding path program 1 times [2021-12-14 16:04:02,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143117794] [2021-12-14 16:04:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:02,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:02,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:02,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143117794] [2021-12-14 16:04:02,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143117794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:02,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:02,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:04:02,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018226264] [2021-12-14 16:04:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:02,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:04:02,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:04:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:04:02,193 INFO L87 Difference]: Start difference. First operand 3034 states and 4898 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-12-14 16:04:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:04,664 INFO L93 Difference]: Finished difference Result 5289 states and 9013 transitions. [2021-12-14 16:04:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:04:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 76 [2021-12-14 16:04:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:04,671 INFO L225 Difference]: With dead ends: 5289 [2021-12-14 16:04:04,671 INFO L226 Difference]: Without dead ends: 3785 [2021-12-14 16:04:04,673 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 [2021-12-14 16:04:04,673 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 875 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:04,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 544 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:04:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-12-14 16:04:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2021-12-14 16:04:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3783 states have (on average 1.4203013481363997) internal successors, (5373), 3784 states have internal predecessors, (5373), 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) [2021-12-14 16:04:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5373 transitions. [2021-12-14 16:04:04,759 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5373 transitions. Word has length 76 [2021-12-14 16:04:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:04,759 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5373 transitions. [2021-12-14 16:04:04,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-12-14 16:04:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5373 transitions. [2021-12-14 16:04:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 16:04:04,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:04,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:04:04,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:04:04,761 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -102888099, now seen corresponding path program 1 times [2021-12-14 16:04:04,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:04,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643571036] [2021-12-14 16:04:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:04,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:04:04,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:04,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643571036] [2021-12-14 16:04:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643571036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:04,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:04:04,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630456047] [2021-12-14 16:04:04,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:04,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:04:04,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:04:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:04:04,799 INFO L87 Difference]: Start difference. First operand 3785 states and 5373 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-12-14 16:04:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:07,395 INFO L93 Difference]: Finished difference Result 8293 states and 11874 transitions. [2021-12-14 16:04:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:04:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 78 [2021-12-14 16:04:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:07,405 INFO L225 Difference]: With dead ends: 8293 [2021-12-14 16:04:07,405 INFO L226 Difference]: Without dead ends: 6038 [2021-12-14 16:04:07,408 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 [2021-12-14 16:04:07,409 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 821 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:07,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 714 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 16:04:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-12-14 16:04:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 6038. [2021-12-14 16:04:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6036 states have (on average 1.3170974155069584) internal successors, (7950), 6037 states have internal predecessors, (7950), 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) [2021-12-14 16:04:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 7950 transitions. [2021-12-14 16:04:07,563 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 7950 transitions. Word has length 78 [2021-12-14 16:04:07,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:07,563 INFO L470 AbstractCegarLoop]: Abstraction has 6038 states and 7950 transitions. [2021-12-14 16:04:07,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-12-14 16:04:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 7950 transitions. [2021-12-14 16:04:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:04:07,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:07,565 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:07,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:04:07,566 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-14 16:04:07,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599946082] [2021-12-14 16:04:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:07,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:04:07,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599946082] [2021-12-14 16:04:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599946082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:07,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:07,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143844911] [2021-12-14 16:04:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:07,610 INFO L87 Difference]: Start difference. First operand 6038 states and 7950 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-14 16:04:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:07,875 INFO L93 Difference]: Finished difference Result 12344 states and 16719 transitions. [2021-12-14 16:04:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 79 [2021-12-14 16:04:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:07,889 INFO L225 Difference]: With dead ends: 12344 [2021-12-14 16:04:07,890 INFO L226 Difference]: Without dead ends: 10846 [2021-12-14 16:04:07,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:07,896 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:07,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10846 states. [2021-12-14 16:04:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10846 to 7534. [2021-12-14 16:04:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7534 states, 7532 states have (on average 1.3295273499734466) internal successors, (10014), 7533 states have internal predecessors, (10014), 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) [2021-12-14 16:04:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7534 states to 7534 states and 10014 transitions. [2021-12-14 16:04:08,086 INFO L78 Accepts]: Start accepts. Automaton has 7534 states and 10014 transitions. Word has length 79 [2021-12-14 16:04:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 7534 states and 10014 transitions. [2021-12-14 16:04:08,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-14 16:04:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7534 states and 10014 transitions. [2021-12-14 16:04:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:04:08,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:08,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:08,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:04:08,089 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-14 16:04:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932975283] [2021-12-14 16:04:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:08,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 16:04:08,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932975283] [2021-12-14 16:04:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932975283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:08,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:08,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:08,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252054709] [2021-12-14 16:04:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:08,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:08,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:08,148 INFO L87 Difference]: Start difference. First operand 7534 states and 10014 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-14 16:04:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:08,511 INFO L93 Difference]: Finished difference Result 13840 states and 18783 transitions. [2021-12-14 16:04:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 79 [2021-12-14 16:04:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:08,529 INFO L225 Difference]: With dead ends: 13840 [2021-12-14 16:04:08,529 INFO L226 Difference]: Without dead ends: 12342 [2021-12-14 16:04:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:08,534 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4706 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:08,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4706 Valid, 3379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2021-12-14 16:04:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 9782. [2021-12-14 16:04:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9782 states, 9780 states have (on average 1.3384458077709611) internal successors, (13090), 9781 states have internal predecessors, (13090), 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) [2021-12-14 16:04:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9782 states to 9782 states and 13090 transitions. [2021-12-14 16:04:08,791 INFO L78 Accepts]: Start accepts. Automaton has 9782 states and 13090 transitions. Word has length 79 [2021-12-14 16:04:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:08,792 INFO L470 AbstractCegarLoop]: Abstraction has 9782 states and 13090 transitions. [2021-12-14 16:04:08,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-14 16:04:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9782 states and 13090 transitions. [2021-12-14 16:04:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:04:08,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:08,794 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:08,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:04:08,794 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-14 16:04:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:08,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82506371] [2021-12-14 16:04:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:08,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:04:08,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82506371] [2021-12-14 16:04:08,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82506371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:08,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:08,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:08,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648428693] [2021-12-14 16:04:08,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:08,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:08,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:08,844 INFO L87 Difference]: Start difference. First operand 9782 states and 13090 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-14 16:04:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:09,308 INFO L93 Difference]: Finished difference Result 15336 states and 20847 transitions. [2021-12-14 16:04:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 79 [2021-12-14 16:04:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:09,328 INFO L225 Difference]: With dead ends: 15336 [2021-12-14 16:04:09,328 INFO L226 Difference]: Without dead ends: 13838 [2021-12-14 16:04:09,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:09,333 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4738 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:09,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13838 states. [2021-12-14 16:04:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13838 to 11278. [2021-12-14 16:04:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11278 states, 11276 states have (on average 1.3439162823696347) internal successors, (15154), 11277 states have internal predecessors, (15154), 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) [2021-12-14 16:04:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11278 states to 11278 states and 15154 transitions. [2021-12-14 16:04:09,713 INFO L78 Accepts]: Start accepts. Automaton has 11278 states and 15154 transitions. Word has length 79 [2021-12-14 16:04:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:09,713 INFO L470 AbstractCegarLoop]: Abstraction has 11278 states and 15154 transitions. [2021-12-14 16:04:09,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-14 16:04:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11278 states and 15154 transitions. [2021-12-14 16:04:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:04:09,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:09,715 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:09,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:04:09,716 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-14 16:04:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204905896] [2021-12-14 16:04:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:09,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:04:09,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:09,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204905896] [2021-12-14 16:04:09,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204905896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:04:09,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:04:09,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:04:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913987997] [2021-12-14 16:04:09,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:04:09,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:04:09,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:04:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:04:09,755 INFO L87 Difference]: Start difference. First operand 11278 states and 15154 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-12-14 16:04:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:10,207 INFO L93 Difference]: Finished difference Result 15952 states and 21711 transitions. [2021-12-14 16:04:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:04:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 79 [2021-12-14 16:04:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:10,256 INFO L225 Difference]: With dead ends: 15952 [2021-12-14 16:04:10,256 INFO L226 Difference]: Without dead ends: 14894 [2021-12-14 16:04:10,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:04:10,261 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4739 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:10,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:04:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14894 states. [2021-12-14 16:04:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14894 to 12334. [2021-12-14 16:04:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12334 states, 12332 states have (on average 1.3481998053843658) internal successors, (16626), 12333 states have internal predecessors, (16626), 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) [2021-12-14 16:04:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12334 states to 12334 states and 16626 transitions. [2021-12-14 16:04:10,630 INFO L78 Accepts]: Start accepts. Automaton has 12334 states and 16626 transitions. Word has length 79 [2021-12-14 16:04:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:10,631 INFO L470 AbstractCegarLoop]: Abstraction has 12334 states and 16626 transitions. [2021-12-14 16:04:10,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-12-14 16:04:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12334 states and 16626 transitions. [2021-12-14 16:04:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 16:04:10,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:10,639 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:10,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:04:10,639 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-14 16:04:10,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:10,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20427879] [2021-12-14 16:04:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:10,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:10,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20427879] [2021-12-14 16:04:10,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20427879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:04:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827188553] [2021-12-14 16:04:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:10,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:04:10,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:04:10,840 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) [2021-12-14 16:04:10,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:04:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:10,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:04:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:04:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:11,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:04:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827188553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:04:11,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:04:11,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-14 16:04:11,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291094028] [2021-12-14 16:04:11,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:04:11,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:04:11,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:04:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:04:11,616 INFO L87 Difference]: Start difference. First operand 12334 states and 16626 transitions. Second operand has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 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) [2021-12-14 16:04:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:04:27,731 INFO L93 Difference]: Finished difference Result 153820 states and 210050 transitions. [2021-12-14 16:04:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-12-14 16:04:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 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 80 [2021-12-14 16:04:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:04:27,994 INFO L225 Difference]: With dead ends: 153820 [2021-12-14 16:04:27,994 INFO L226 Difference]: Without dead ends: 144766 [2021-12-14 16:04:28,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35111 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9618, Invalid=67388, Unknown=0, NotChecked=0, Total=77006 [2021-12-14 16:04:28,057 INFO L933 BasicCegarLoop]: 1690 mSDtfsCounter, 27510 mSDsluCounter, 11042 mSDsCounter, 0 mSdLazyCounter, 4098 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27510 SdHoareTripleChecker+Valid, 12732 SdHoareTripleChecker+Invalid, 5039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 4098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:04:28,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27510 Valid, 12732 Invalid, 5039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 4098 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:04:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144766 states. [2021-12-14 16:04:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144766 to 76609. [2021-12-14 16:04:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76609 states, 76607 states have (on average 1.3539885389063662) internal successors, (103725), 76608 states have internal predecessors, (103725), 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) [2021-12-14 16:04:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76609 states to 76609 states and 103725 transitions. [2021-12-14 16:04:32,674 INFO L78 Accepts]: Start accepts. Automaton has 76609 states and 103725 transitions. Word has length 80 [2021-12-14 16:04:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:04:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 76609 states and 103725 transitions. [2021-12-14 16:04:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 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) [2021-12-14 16:04:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 76609 states and 103725 transitions. [2021-12-14 16:04:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 16:04:32,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:04:32,679 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:04:32,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:04:32,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:04:32,880 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:04:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:04:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2021-12-14 16:04:32,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:04:32,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002068420] [2021-12-14 16:04:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:32,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:04:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:32,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:04:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002068420] [2021-12-14 16:04:32,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002068420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:04:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263291100] [2021-12-14 16:04:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:04:32,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:04:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:04:32,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:04:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:04:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:04:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:04:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:04:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:33,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:04:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:04:34,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263291100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:04:34,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:04:34,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-14 16:04:34,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329934655] [2021-12-14 16:04:34,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:04:34,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 16:04:34,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:04:34,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 16:04:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-14 16:04:34,343 INFO L87 Difference]: Start difference. First operand 76609 states and 103725 transitions. Second operand has 26 states, 26 states have (on average 7.884615384615385) internal successors, (205), 25 states have internal predecessors, (205), 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)