./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label28.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 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:21:32,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:21:32,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:21:32,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:21:32,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:21:32,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:21:32,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:21:32,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:21:32,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:21:32,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:21:32,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:21:32,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:21:32,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:21:32,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:21:32,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:21:32,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:21:32,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:21:32,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:21:32,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:21:32,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:21:32,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:21:32,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:21:32,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:21:32,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:21:32,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:21:32,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:21:32,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:21:32,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:21:32,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:21:32,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:21:32,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:21:32,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:21:32,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:21:32,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:21:32,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:21:32,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:21:32,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:21:32,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:21:32,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:21:32,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:21:32,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:21:32,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:21:32,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:21:32,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:21:32,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:21:32,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:21:32,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:21:32,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:21:32,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:21:32,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:21:32,917 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:21:32,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:21:32,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:21:32,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:21:32,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:21:32,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:21:32,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:21:32,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:21:32,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:21:32,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:21:32,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:21:32,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:21:32,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:21:32,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:21:32,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:21:32,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:21:32,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf [2021-12-17 05:21:33,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:21:33,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:21:33,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:21:33,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:21:33,141 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:21:33,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-12-17 05:21:33,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a1f7a0d/6c5e4f78820346e2bc855f5607f13660/FLAGa392e7c73 [2021-12-17 05:21:33,867 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:21:33,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-12-17 05:21:33,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a1f7a0d/6c5e4f78820346e2bc855f5607f13660/FLAGa392e7c73 [2021-12-17 05:21:34,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a1f7a0d/6c5e4f78820346e2bc855f5607f13660 [2021-12-17 05:21:34,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:21:34,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:21:34,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:21:34,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:21:34,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:21:34,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:21:34" (1/1) ... [2021-12-17 05:21:34,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d319f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:34, skipping insertion in model container [2021-12-17 05:21:34,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:21:34" (1/1) ... [2021-12-17 05:21:34,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:21:34,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:21:34,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-12-17 05:21:35,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:21:35,545 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:21:35,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-12-17 05:21:36,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:21:36,145 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:21:36,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36 WrapperNode [2021-12-17 05:21:36,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:21:36,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:21:36,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:21:36,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:21:36,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:36,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:36,822 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-17 05:21:36,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:21:36,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:21:36,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:21:36,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:21:36,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:36,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:21:37,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:21:37,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:21:37,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:21:37,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (1/1) ... [2021-12-17 05:21:37,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:21:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:21:37,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 05:21:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 05:21:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:21:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:21:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:21:37,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:21:37,804 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:21:37,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:21:43,126 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:21:43,141 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:21:43,141 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:21:43,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:21:43 BoogieIcfgContainer [2021-12-17 05:21:43,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:21:43,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:21:43,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:21:43,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:21:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:21:34" (1/3) ... [2021-12-17 05:21:43,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5419aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:21:43, skipping insertion in model container [2021-12-17 05:21:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:21:36" (2/3) ... [2021-12-17 05:21:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5419aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:21:43, skipping insertion in model container [2021-12-17 05:21:43,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:21:43" (3/3) ... [2021-12-17 05:21:43,150 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2021-12-17 05:21:43,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:21:43,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:21:43,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:21:43,194 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 05:21:43,194 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:21:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 05:21:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:21:43,226 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] [2021-12-17 05:21:43,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:21:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:21:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2021-12-17 05:21:43,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:21:43,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729729529] [2021-12-17 05:21:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:21:43,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:21:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:21:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:21:43,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:21:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729729529] [2021-12-17 05:21:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729729529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:21:43,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:21:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:21:43,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271145439] [2021-12-17 05:21:43,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:21:43,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:21:43,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:21:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:21:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:21:43,393 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:21:49,796 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-17 05:21:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:21:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-17 05:21:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:21:49,824 INFO L225 Difference]: With dead ends: 4957 [2021-12-17 05:21:49,825 INFO L226 Difference]: Without dead ends: 3129 [2021-12-17 05:21:49,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:21:49,834 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1603 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:21:49,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-17 05:21:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-17 05:21:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-17 05:21:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-17 05:21:50,047 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 23 [2021-12-17 05:21:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:21:50,047 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-17 05:21:50,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-17 05:21:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 05:21:50,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:21:50,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:21:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:21:50,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:21:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:21:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1128031860, now seen corresponding path program 1 times [2021-12-17 05:21:50,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:21:50,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25755996] [2021-12-17 05:21:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:21:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:21:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:21:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:21:50,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:21:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25755996] [2021-12-17 05:21:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25755996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:21:50,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:21:50,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:21:50,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596567166] [2021-12-17 05:21:50,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:21:50,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:21:50,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:21:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:21:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:21:50,132 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:21:55,147 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-17 05:21:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:21:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-17 05:21:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:21:55,164 INFO L225 Difference]: With dead ends: 9153 [2021-12-17 05:21:55,164 INFO L226 Difference]: Without dead ends: 6047 [2021-12-17 05:21:55,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:21:55,171 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:21:55,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 05:21:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-17 05:21:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-17 05:21:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-17 05:21:55,251 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 90 [2021-12-17 05:21:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:21:55,253 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-17 05:21:55,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:21:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-17 05:21:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 05:21:55,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:21:55,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:21:55,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:21:55,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:21:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:21:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash 941524856, now seen corresponding path program 1 times [2021-12-17 05:21:55,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:21:55,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426614835] [2021-12-17 05:21:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:21:55,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:21:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:21:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:21:55,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:21:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426614835] [2021-12-17 05:21:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426614835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:21:55,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:21:55,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:21:55,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122619219] [2021-12-17 05:21:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:21:55,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:21:55,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:21:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:21:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:21:55,353 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:03,427 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-17 05:22:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:22:03,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-17 05:22:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:03,461 INFO L225 Difference]: With dead ends: 19026 [2021-12-17 05:22:03,462 INFO L226 Difference]: Without dead ends: 12997 [2021-12-17 05:22:03,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:22:03,471 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4260 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 10840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:03,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 1207 Invalid, 10840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-17 05:22:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-17 05:22:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-17 05:22:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.346243222308288) internal successors, (17380), 12910 states have internal predecessors, (17380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2021-12-17 05:22:03,662 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 92 [2021-12-17 05:22:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:03,663 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2021-12-17 05:22:03,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2021-12-17 05:22:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-17 05:22:03,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:03,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:22:03,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1869425936, now seen corresponding path program 1 times [2021-12-17 05:22:03,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079013408] [2021-12-17 05:22:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:03,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:22:03,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:03,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079013408] [2021-12-17 05:22:03,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079013408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:03,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:03,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:22:03,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468825522] [2021-12-17 05:22:03,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:03,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:22:03,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:22:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:22:03,986 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:09,401 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2021-12-17 05:22:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:22:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-12-17 05:22:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:09,428 INFO L225 Difference]: With dead ends: 24486 [2021-12-17 05:22:09,429 INFO L226 Difference]: Without dead ends: 12911 [2021-12-17 05:22:09,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:22:09,442 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:09,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 05:22:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-17 05:22:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-17 05:22:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3455460883036405) internal successors, (17371), 12910 states have internal predecessors, (17371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2021-12-17 05:22:09,614 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 327 [2021-12-17 05:22:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:09,616 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2021-12-17 05:22:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2021-12-17 05:22:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-12-17 05:22:09,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:09,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:22:09,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1951600658, now seen corresponding path program 1 times [2021-12-17 05:22:09,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114164532] [2021-12-17 05:22:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:09,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:22:09,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114164532] [2021-12-17 05:22:09,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114164532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:22:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732242825] [2021-12-17 05:22:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:09,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:22:09,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:22:09,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:22:09,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 05:22:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:22:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:22:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 05:22:10,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:22:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732242825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:10,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:22:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 05:22:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042975392] [2021-12-17 05:22:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:22:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:22:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:22:10,969 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:17,058 INFO L93 Difference]: Finished difference Result 35414 states and 48549 transitions. [2021-12-17 05:22:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:22:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 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 501 [2021-12-17 05:22:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:17,094 INFO L225 Difference]: With dead ends: 35414 [2021-12-17 05:22:17,094 INFO L226 Difference]: Without dead ends: 23870 [2021-12-17 05:22:17,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:22:17,102 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 1016 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4888 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 4888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:17,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1771 Invalid, 5915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 4888 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 05:22:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2021-12-17 05:22:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 23866. [2021-12-17 05:22:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23866 states, 23865 states have (on average 1.2676304211187932) internal successors, (30252), 23865 states have internal predecessors, (30252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23866 states to 23866 states and 30252 transitions. [2021-12-17 05:22:17,341 INFO L78 Accepts]: Start accepts. Automaton has 23866 states and 30252 transitions. Word has length 501 [2021-12-17 05:22:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 23866 states and 30252 transitions. [2021-12-17 05:22:17,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 23866 states and 30252 transitions. [2021-12-17 05:22:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-17 05:22:17,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:17,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:17,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 05:22:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:22:17,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1065890336, now seen corresponding path program 1 times [2021-12-17 05:22:17,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723685946] [2021-12-17 05:22:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:17,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 05:22:17,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:17,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723685946] [2021-12-17 05:22:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723685946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:17,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:17,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:22:17,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6559022] [2021-12-17 05:22:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:22:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:22:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:17,772 INFO L87 Difference]: Start difference. First operand 23866 states and 30252 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:22,585 INFO L93 Difference]: Finished difference Result 55931 states and 70570 transitions. [2021-12-17 05:22:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:22:22,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 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 575 [2021-12-17 05:22:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:22,625 INFO L225 Difference]: With dead ends: 55931 [2021-12-17 05:22:22,626 INFO L226 Difference]: Without dead ends: 33432 [2021-12-17 05:22:22,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:22,650 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:22,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 05:22:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33432 states. [2021-12-17 05:22:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33432 to 33422. [2021-12-17 05:22:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33422 states, 33421 states have (on average 1.2002932288082344) internal successors, (40115), 33421 states have internal predecessors, (40115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33422 states to 33422 states and 40115 transitions. [2021-12-17 05:22:22,969 INFO L78 Accepts]: Start accepts. Automaton has 33422 states and 40115 transitions. Word has length 575 [2021-12-17 05:22:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:22,970 INFO L470 AbstractCegarLoop]: Abstraction has 33422 states and 40115 transitions. [2021-12-17 05:22:22,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33422 states and 40115 transitions. [2021-12-17 05:22:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-12-17 05:22:22,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:22,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:22,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:22:22,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1907571655, now seen corresponding path program 1 times [2021-12-17 05:22:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844387350] [2021-12-17 05:22:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:22,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 05:22:23,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844387350] [2021-12-17 05:22:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844387350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:23,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:23,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:22:23,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425427703] [2021-12-17 05:22:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:22:23,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:22:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:23,148 INFO L87 Difference]: Start difference. First operand 33422 states and 40115 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:29,768 INFO L93 Difference]: Finished difference Result 97081 states and 116999 transitions. [2021-12-17 05:22:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:22:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 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 578 [2021-12-17 05:22:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:29,856 INFO L225 Difference]: With dead ends: 97081 [2021-12-17 05:22:29,856 INFO L226 Difference]: Without dead ends: 65026 [2021-12-17 05:22:29,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:29,871 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:29,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 982 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-17 05:22:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65026 states. [2021-12-17 05:22:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65026 to 60928. [2021-12-17 05:22:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60928 states, 60927 states have (on average 1.1845979614949038) internal successors, (72174), 60927 states have internal predecessors, (72174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60928 states to 60928 states and 72174 transitions. [2021-12-17 05:22:30,466 INFO L78 Accepts]: Start accepts. Automaton has 60928 states and 72174 transitions. Word has length 578 [2021-12-17 05:22:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:30,466 INFO L470 AbstractCegarLoop]: Abstraction has 60928 states and 72174 transitions. [2021-12-17 05:22:30,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 60928 states and 72174 transitions. [2021-12-17 05:22:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-12-17 05:22:30,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:30,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:30,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:22:30,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1407792790, now seen corresponding path program 1 times [2021-12-17 05:22:30,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:30,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544041154] [2021-12-17 05:22:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:30,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 21 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:22:30,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:30,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544041154] [2021-12-17 05:22:30,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544041154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:22:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017454697] [2021-12-17 05:22:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:30,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:22:30,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:22:30,756 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) [2021-12-17 05:22:30,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 05:22:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:22:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:22:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-17 05:22:31,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:22:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017454697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:31,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:22:31,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 05:22:31,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896556244] [2021-12-17 05:22:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:31,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:22:31,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:22:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:22:31,903 INFO L87 Difference]: Start difference. First operand 60928 states and 72174 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:37,510 INFO L93 Difference]: Finished difference Result 140998 states and 169107 transitions. [2021-12-17 05:22:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:22:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 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 708 [2021-12-17 05:22:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:37,624 INFO L225 Difference]: With dead ends: 140998 [2021-12-17 05:22:37,624 INFO L226 Difference]: Without dead ends: 81437 [2021-12-17 05:22:37,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:22:37,649 INFO L933 BasicCegarLoop]: 3147 mSDtfsCounter, 1420 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 1637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 5387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1637 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:37,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 3336 Invalid, 5387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1637 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 05:22:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81437 states. [2021-12-17 05:22:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81437 to 78696. [2021-12-17 05:22:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78696 states, 78695 states have (on average 1.1595654107630726) internal successors, (91252), 78695 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78696 states to 78696 states and 91252 transitions. [2021-12-17 05:22:38,397 INFO L78 Accepts]: Start accepts. Automaton has 78696 states and 91252 transitions. Word has length 708 [2021-12-17 05:22:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:38,399 INFO L470 AbstractCegarLoop]: Abstraction has 78696 states and 91252 transitions. [2021-12-17 05:22:38,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 78696 states and 91252 transitions. [2021-12-17 05:22:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 721 [2021-12-17 05:22:38,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:38,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:38,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 05:22:38,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 05:22:38,825 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash 529093364, now seen corresponding path program 1 times [2021-12-17 05:22:38,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655792142] [2021-12-17 05:22:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:38,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-17 05:22:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655792142] [2021-12-17 05:22:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655792142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:39,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:39,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:22:39,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418256781] [2021-12-17 05:22:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:39,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:22:39,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:22:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:39,327 INFO L87 Difference]: Start difference. First operand 78696 states and 91252 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:44,142 INFO L93 Difference]: Finished difference Result 166953 states and 192497 transitions. [2021-12-17 05:22:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:22:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 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 720 [2021-12-17 05:22:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:44,243 INFO L225 Difference]: With dead ends: 166953 [2021-12-17 05:22:44,244 INFO L226 Difference]: Without dead ends: 86894 [2021-12-17 05:22:44,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:22:44,271 INFO L933 BasicCegarLoop]: 1648 mSDtfsCounter, 989 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4422 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:44,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1836 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4422 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 05:22:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86894 states. [2021-12-17 05:22:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86894 to 86892. [2021-12-17 05:22:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86892 states, 86891 states have (on average 1.1459875015824423) internal successors, (99576), 86891 states have internal predecessors, (99576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86892 states to 86892 states and 99576 transitions. [2021-12-17 05:22:45,219 INFO L78 Accepts]: Start accepts. Automaton has 86892 states and 99576 transitions. Word has length 720 [2021-12-17 05:22:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:45,219 INFO L470 AbstractCegarLoop]: Abstraction has 86892 states and 99576 transitions. [2021-12-17 05:22:45,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 86892 states and 99576 transitions. [2021-12-17 05:22:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-12-17 05:22:45,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:45,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:45,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:22:45,230 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2144527646, now seen corresponding path program 1 times [2021-12-17 05:22:45,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861669077] [2021-12-17 05:22:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:45,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-17 05:22:45,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861669077] [2021-12-17 05:22:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861669077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:45,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:22:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248847045] [2021-12-17 05:22:45,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:22:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:22:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:22:45,645 INFO L87 Difference]: Start difference. First operand 86892 states and 99576 transitions. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:22:56,266 INFO L93 Difference]: Finished difference Result 288697 states and 335027 transitions. [2021-12-17 05:22:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:22:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 807 [2021-12-17 05:22:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:22:56,611 INFO L225 Difference]: With dead ends: 288697 [2021-12-17 05:22:56,612 INFO L226 Difference]: Without dead ends: 203172 [2021-12-17 05:22:56,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:22:56,676 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 3268 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 9268 mSolverCounterSat, 2623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3268 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 11891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2623 IncrementalHoareTripleChecker+Valid, 9268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:22:56,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3268 Valid, 1310 Invalid, 11891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2623 Valid, 9268 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-12-17 05:22:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203172 states. [2021-12-17 05:22:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203172 to 192110. [2021-12-17 05:22:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192110 states, 192109 states have (on average 1.1327527601517888) internal successors, (217612), 192109 states have internal predecessors, (217612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192110 states to 192110 states and 217612 transitions. [2021-12-17 05:22:59,467 INFO L78 Accepts]: Start accepts. Automaton has 192110 states and 217612 transitions. Word has length 807 [2021-12-17 05:22:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:22:59,467 INFO L470 AbstractCegarLoop]: Abstraction has 192110 states and 217612 transitions. [2021-12-17 05:22:59,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:22:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 192110 states and 217612 transitions. [2021-12-17 05:22:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-12-17 05:22:59,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:22:59,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:22:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 05:22:59,478 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:22:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:22:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -27186972, now seen corresponding path program 1 times [2021-12-17 05:22:59,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:22:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18720276] [2021-12-17 05:22:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:22:59,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:22:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:22:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-17 05:22:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:22:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18720276] [2021-12-17 05:22:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18720276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:22:59,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:22:59,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:22:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040218118] [2021-12-17 05:22:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:22:59,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:22:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:22:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:22:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:22:59,760 INFO L87 Difference]: Start difference. First operand 192110 states and 217612 transitions. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:23:10,598 INFO L93 Difference]: Finished difference Result 493442 states and 573012 transitions. [2021-12-17 05:23:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:23:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 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 883 [2021-12-17 05:23:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:23:11,076 INFO L225 Difference]: With dead ends: 493442 [2021-12-17 05:23:11,077 INFO L226 Difference]: Without dead ends: 314990 [2021-12-17 05:23:11,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:23:11,171 INFO L933 BasicCegarLoop]: 2391 mSDtfsCounter, 2889 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 10130 mSolverCounterSat, 1470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2889 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 11600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1470 IncrementalHoareTripleChecker+Valid, 10130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:23:11,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2889 Valid, 2862 Invalid, 11600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1470 Valid, 10130 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-12-17 05:23:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314990 states. [2021-12-17 05:23:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314990 to 314981. [2021-12-17 05:23:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314981 states, 314980 states have (on average 1.1383706902025525) internal successors, (358564), 314980 states have internal predecessors, (358564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314981 states to 314981 states and 358564 transitions. [2021-12-17 05:23:15,246 INFO L78 Accepts]: Start accepts. Automaton has 314981 states and 358564 transitions. Word has length 883 [2021-12-17 05:23:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:23:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 314981 states and 358564 transitions. [2021-12-17 05:23:15,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 314981 states and 358564 transitions. [2021-12-17 05:23:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2021-12-17 05:23:15,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:23:15,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:23:15,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:23:15,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:23:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:23:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1398383458, now seen corresponding path program 1 times [2021-12-17 05:23:15,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:23:15,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465618558] [2021-12-17 05:23:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:23:15,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:23:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:23:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-17 05:23:15,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:23:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465618558] [2021-12-17 05:23:15,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465618558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:23:15,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:23:15,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:23:15,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301890999] [2021-12-17 05:23:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:23:15,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:23:15,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:23:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:23:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:23:15,527 INFO L87 Difference]: Start difference. First operand 314981 states and 358564 transitions. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:23:22,884 INFO L93 Difference]: Finished difference Result 627245 states and 714411 transitions. [2021-12-17 05:23:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:23:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 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 899 [2021-12-17 05:23:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:23:23,406 INFO L225 Difference]: With dead ends: 627245 [2021-12-17 05:23:23,407 INFO L226 Difference]: Without dead ends: 313631 [2021-12-17 05:23:23,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:23:23,564 INFO L933 BasicCegarLoop]: 2866 mSDtfsCounter, 1355 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4415 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 4415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:23:23,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 3062 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 4415 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 05:23:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313631 states. [2021-12-17 05:23:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313631 to 308154. [2021-12-17 05:23:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308154 states, 308153 states have (on average 1.1213585459171256) internal successors, (345550), 308153 states have internal predecessors, (345550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308154 states to 308154 states and 345550 transitions. [2021-12-17 05:23:27,894 INFO L78 Accepts]: Start accepts. Automaton has 308154 states and 345550 transitions. Word has length 899 [2021-12-17 05:23:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:23:27,903 INFO L470 AbstractCegarLoop]: Abstraction has 308154 states and 345550 transitions. [2021-12-17 05:23:27,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 308154 states and 345550 transitions. [2021-12-17 05:23:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2021-12-17 05:23:27,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:23:27,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:23:27,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 05:23:27,936 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:23:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:23:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1089265495, now seen corresponding path program 1 times [2021-12-17 05:23:27,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:23:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498286366] [2021-12-17 05:23:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:23:27,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:23:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:23:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 42 proven. 424 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-17 05:23:28,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:23:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498286366] [2021-12-17 05:23:28,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498286366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:23:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066819415] [2021-12-17 05:23:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:23:28,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:23:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:23:28,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:23:28,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 05:23:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:23:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:23:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:23:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-17 05:23:29,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:23:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066819415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:23:29,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:23:29,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 05:23:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501501320] [2021-12-17 05:23:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:23:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:23:29,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:23:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:23:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:23:29,731 INFO L87 Difference]: Start difference. First operand 308154 states and 345550 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:23:37,586 INFO L93 Difference]: Finished difference Result 664089 states and 755596 transitions. [2021-12-17 05:23:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:23:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 908 [2021-12-17 05:23:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:23:38,220 INFO L225 Difference]: With dead ends: 664089 [2021-12-17 05:23:38,220 INFO L226 Difference]: Without dead ends: 368228 [2021-12-17 05:23:38,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:23:38,322 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 1581 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 5855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:23:38,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1581 Valid, 1425 Invalid, 5855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [964 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 05:23:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368228 states. [2021-12-17 05:23:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368228 to 361383. [2021-12-17 05:23:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361383 states, 361382 states have (on average 1.1257422893226559) internal successors, (406823), 361382 states have internal predecessors, (406823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361383 states to 361383 states and 406823 transitions. [2021-12-17 05:23:42,902 INFO L78 Accepts]: Start accepts. Automaton has 361383 states and 406823 transitions. Word has length 908 [2021-12-17 05:23:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:23:42,903 INFO L470 AbstractCegarLoop]: Abstraction has 361383 states and 406823 transitions. [2021-12-17 05:23:42,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:23:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 361383 states and 406823 transitions. [2021-12-17 05:23:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2021-12-17 05:23:42,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:23:42,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:23:42,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 05:23:43,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:23:43,118 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:23:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:23:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash -511620113, now seen corresponding path program 1 times [2021-12-17 05:23:43,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:23:43,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114885080] [2021-12-17 05:23:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:23:43,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:23:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:23:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2021-12-17 05:23:43,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:23:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114885080] [2021-12-17 05:23:43,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114885080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:23:43,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:23:43,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:23:43,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694181353] [2021-12-17 05:23:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:23:43,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:23:43,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:23:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:23:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:23:43,952 INFO L87 Difference]: Start difference. First operand 361383 states and 406823 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)