./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label59.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 e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:48:20,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:48:20,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:48:20,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:48:20,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:48:20,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:48:20,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:48:20,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:48:20,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:48:20,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:48:20,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:48:20,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:48:20,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:48:20,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:48:20,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:48:20,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:48:20,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:48:20,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:48:20,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:48:20,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:48:20,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:48:20,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:48:20,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:48:20,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:48:20,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:48:20,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:48:20,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:48:20,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:48:20,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:48:20,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:48:20,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:48:20,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:48:20,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:48:20,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:48:20,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:48:20,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:48:20,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:48:20,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:48:20,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:48:20,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:48:20,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:48:20,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:48:20,931 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:48:20,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:48:20,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:48:20,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:48:20,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:48:20,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:48:20,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:48:20,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:48:20,933 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:48:20,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:48:20,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:48:20,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:48:20,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:48:20,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:48:20,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:48:20,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:48:20,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:48:20,935 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:48:20,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:48:20,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:48:20,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:48:20,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:48:20,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:48:20,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:48:20,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:48:20,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:48:20,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:48:20,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:48:20,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:48:20,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:48:20,938 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:48:20,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:48:20,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:48:20,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:48:20,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc [2021-12-15 22:48:21,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:48:21,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:48:21,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:48:21,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:48:21,205 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:48:21,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-15 22:48:21,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48792a971/9b58179c7bf24457a4695787ac33a651/FLAGd684d8a80 [2021-12-15 22:48:21,974 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:48:21,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-15 22:48:22,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48792a971/9b58179c7bf24457a4695787ac33a651/FLAGd684d8a80 [2021-12-15 22:48:22,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48792a971/9b58179c7bf24457a4695787ac33a651 [2021-12-15 22:48:22,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:48:22,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:48:22,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:48:22,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:48:22,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:48:22,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:48:22" (1/1) ... [2021-12-15 22:48:22,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d383a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:22, skipping insertion in model container [2021-12-15 22:48:22,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:48:22" (1/1) ... [2021-12-15 22:48:22,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:48:22,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:48:22,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c[6607,6620] [2021-12-15 22:48:23,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:48:23,594 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:48:23,623 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c[6607,6620] [2021-12-15 22:48:24,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:48:24,160 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:48:24,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24 WrapperNode [2021-12-15 22:48:24,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:48:24,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:48:24,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:48:24,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:48:24,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:24,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:24,791 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:48:24,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:48:24,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:48:24,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:48:24,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:48:24,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:24,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:24,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:24,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:25,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:25,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:25,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:25,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:48:25,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:48:25,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:48:25,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:48:25,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (1/1) ... [2021-12-15 22:48:25,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:48:25,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:25,408 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) [2021-12-15 22:48:25,435 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 [2021-12-15 22:48:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:48:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:48:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:48:25,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:48:25,530 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:48:25,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:48:29,843 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:48:29,861 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:48:29,861 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:48:29,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:29 BoogieIcfgContainer [2021-12-15 22:48:29,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:48:29,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:48:29,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:48:29,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:48:29,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:48:22" (1/3) ... [2021-12-15 22:48:29,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f13c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:29, skipping insertion in model container [2021-12-15 22:48:29,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:48:24" (2/3) ... [2021-12-15 22:48:29,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f13c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:29, skipping insertion in model container [2021-12-15 22:48:29,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:29" (3/3) ... [2021-12-15 22:48:29,872 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2021-12-15 22:48:29,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:48:29,876 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:48:29,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:48:29,926 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 [2021-12-15 22:48:29,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:48:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 22:48:29,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:29,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:29,961 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-12-15 22:48:29,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:29,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373731824] [2021-12-15 22:48:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:29,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373731824] [2021-12-15 22:48:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373731824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:30,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:30,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:30,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822023211] [2021-12-15 22:48:30,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:30,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:30,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:30,257 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:34,711 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-15 22:48:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-15 22:48:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:34,740 INFO L225 Difference]: With dead ends: 3160 [2021-12-15 22:48:34,740 INFO L226 Difference]: Without dead ends: 1983 [2021-12-15 22:48:34,750 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 [2021-12-15 22:48:34,755 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1057 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:34,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:48:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-15 22:48:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-15 22:48:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-15 22:48:34,871 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 46 [2021-12-15 22:48:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:34,872 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-15 22:48:34,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-15 22:48:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 22:48:34,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:34,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:34,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:48:34,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -928496590, now seen corresponding path program 1 times [2021-12-15 22:48:34,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:34,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392427815] [2021-12-15 22:48:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:34,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:35,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392427815] [2021-12-15 22:48:35,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392427815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:35,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:35,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:35,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45037241] [2021-12-15 22:48:35,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:35,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:48:35,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:48:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:35,109 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:40,609 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-15 22:48:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:48:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-15 22:48:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:40,625 INFO L225 Difference]: With dead ends: 6254 [2021-12-15 22:48:40,625 INFO L226 Difference]: Without dead ends: 4326 [2021-12-15 22:48:40,628 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 [2021-12-15 22:48:40,629 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2618 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:40,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 1036 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 22:48:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-15 22:48:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-15 22:48:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.529615918556224) internal successors, (6611), 4322 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6611 transitions. [2021-12-15 22:48:40,697 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6611 transitions. Word has length 111 [2021-12-15 22:48:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:40,698 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6611 transitions. [2021-12-15 22:48:40,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6611 transitions. [2021-12-15 22:48:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-15 22:48:40,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:40,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:40,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:48:40,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -339079179, now seen corresponding path program 1 times [2021-12-15 22:48:40,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614846087] [2021-12-15 22:48:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:40,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:40,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:40,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614846087] [2021-12-15 22:48:40,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614846087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:40,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598313187] [2021-12-15 22:48:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:40,836 INFO L87 Difference]: Start difference. First operand 4323 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:43,378 INFO L93 Difference]: Finished difference Result 7844 states and 12416 transitions. [2021-12-15 22:48:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-15 22:48:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:43,400 INFO L225 Difference]: With dead ends: 7844 [2021-12-15 22:48:43,401 INFO L226 Difference]: Without dead ends: 4310 [2021-12-15 22:48:43,406 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 [2021-12-15 22:48:43,412 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1086 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:43,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1675 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:48:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-12-15 22:48:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4307. [2021-12-15 22:48:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 1.361356247097074) internal successors, (5862), 4306 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5862 transitions. [2021-12-15 22:48:43,499 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5862 transitions. Word has length 171 [2021-12-15 22:48:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 5862 transitions. [2021-12-15 22:48:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5862 transitions. [2021-12-15 22:48:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-15 22:48:43,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:43,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:43,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:48:43,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1790168010, now seen corresponding path program 1 times [2021-12-15 22:48:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917274976] [2021-12-15 22:48:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:43,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:43,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917274976] [2021-12-15 22:48:43,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917274976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:43,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:43,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:43,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926502748] [2021-12-15 22:48:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:43,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:43,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:43,620 INFO L87 Difference]: Start difference. First operand 4307 states and 5862 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:46,707 INFO L93 Difference]: Finished difference Result 11006 states and 15563 transitions. [2021-12-15 22:48:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-12-15 22:48:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:46,731 INFO L225 Difference]: With dead ends: 11006 [2021-12-15 22:48:46,732 INFO L226 Difference]: Without dead ends: 7488 [2021-12-15 22:48:46,736 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 [2021-12-15 22:48:46,737 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 936 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:46,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1555 Invalid, 3452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:48:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-12-15 22:48:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 7465. [2021-12-15 22:48:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 1.3766077170418007) internal successors, (10275), 7464 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 10275 transitions. [2021-12-15 22:48:46,855 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 10275 transitions. Word has length 234 [2021-12-15 22:48:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:46,857 INFO L470 AbstractCegarLoop]: Abstraction has 7465 states and 10275 transitions. [2021-12-15 22:48:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 10275 transitions. [2021-12-15 22:48:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 22:48:46,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:46,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:48:46,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:48:46,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 528389062, now seen corresponding path program 1 times [2021-12-15 22:48:46,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682285750] [2021-12-15 22:48:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:46,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 22:48:47,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682285750] [2021-12-15 22:48:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682285750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:47,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:47,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:47,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820158336] [2021-12-15 22:48:47,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:47,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:47,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:47,008 INFO L87 Difference]: Start difference. First operand 7465 states and 10275 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:50,184 INFO L93 Difference]: Finished difference Result 20464 states and 28783 transitions. [2021-12-15 22:48:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 237 [2021-12-15 22:48:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:50,220 INFO L225 Difference]: With dead ends: 20464 [2021-12-15 22:48:50,220 INFO L226 Difference]: Without dead ends: 13788 [2021-12-15 22:48:50,231 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 [2021-12-15 22:48:50,232 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 926 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:50,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 829 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 22:48:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2021-12-15 22:48:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 13777. [2021-12-15 22:48:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.2952961672473868) internal successors, (17844), 13776 states have internal predecessors, (17844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 17844 transitions. [2021-12-15 22:48:50,460 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 17844 transitions. Word has length 237 [2021-12-15 22:48:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:50,461 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 17844 transitions. [2021-12-15 22:48:50,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 17844 transitions. [2021-12-15 22:48:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-15 22:48:50,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:50,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:48:50,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:48:50,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1541403827, now seen corresponding path program 1 times [2021-12-15 22:48:50,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:50,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764550564] [2021-12-15 22:48:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:50,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:50,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:50,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764550564] [2021-12-15 22:48:50,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764550564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:50,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:50,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:50,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541425976] [2021-12-15 22:48:50,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:50,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:50,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:50,664 INFO L87 Difference]: Start difference. First operand 13777 states and 17844 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:53,747 INFO L93 Difference]: Finished difference Result 33096 states and 43091 transitions. [2021-12-15 22:48:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 258 [2021-12-15 22:48:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:53,785 INFO L225 Difference]: With dead ends: 33096 [2021-12-15 22:48:53,786 INFO L226 Difference]: Without dead ends: 20108 [2021-12-15 22:48:53,802 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 [2021-12-15 22:48:53,803 INFO L933 BasicCegarLoop]: 1830 mSDtfsCounter, 749 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:53,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1970 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:48:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2021-12-15 22:48:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 20078. [2021-12-15 22:48:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20078 states, 20077 states have (on average 1.2317577327289935) internal successors, (24730), 20077 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20078 states to 20078 states and 24730 transitions. [2021-12-15 22:48:54,066 INFO L78 Accepts]: Start accepts. Automaton has 20078 states and 24730 transitions. Word has length 258 [2021-12-15 22:48:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:54,067 INFO L470 AbstractCegarLoop]: Abstraction has 20078 states and 24730 transitions. [2021-12-15 22:48:54,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 20078 states and 24730 transitions. [2021-12-15 22:48:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-15 22:48:54,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:54,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:54,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:48:54,073 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash -824584201, now seen corresponding path program 1 times [2021-12-15 22:48:54,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99676288] [2021-12-15 22:48:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:54,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:54,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99676288] [2021-12-15 22:48:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99676288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:48:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721504349] [2021-12-15 22:48:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:54,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:54,343 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) [2021-12-15 22:48:54,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:48:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:54,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:48:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:48:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 22:48:54,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:48:54,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721504349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:54,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:48:54,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:48:54,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052530118] [2021-12-15 22:48:54,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:54,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:54,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:48:54,904 INFO L87 Difference]: Start difference. First operand 20078 states and 24730 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:58,197 INFO L93 Difference]: Finished difference Result 57468 states and 71270 transitions. [2021-12-15 22:48:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:58,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 287 [2021-12-15 22:48:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:58,271 INFO L225 Difference]: With dead ends: 57468 [2021-12-15 22:48:58,272 INFO L226 Difference]: Without dead ends: 38179 [2021-12-15 22:48:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:48:58,297 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 983 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:58,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1724 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 22:48:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38179 states. [2021-12-15 22:48:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38179 to 34243. [2021-12-15 22:48:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34243 states, 34242 states have (on average 1.2130424624729863) internal successors, (41537), 34242 states have internal predecessors, (41537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34243 states to 34243 states and 41537 transitions. [2021-12-15 22:48:58,728 INFO L78 Accepts]: Start accepts. Automaton has 34243 states and 41537 transitions. Word has length 287 [2021-12-15 22:48:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:58,729 INFO L470 AbstractCegarLoop]: Abstraction has 34243 states and 41537 transitions. [2021-12-15 22:48:58,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 34243 states and 41537 transitions. [2021-12-15 22:48:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-15 22:48:58,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:58,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:48:58,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:48:58,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:58,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1943117730, now seen corresponding path program 1 times [2021-12-15 22:48:58,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:58,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935519981] [2021-12-15 22:48:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:58,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:59,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935519981] [2021-12-15 22:48:59,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935519981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:48:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26415410] [2021-12-15 22:48:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:59,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:59,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:59,173 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) [2021-12-15 22:48:59,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:48:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:48:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:48:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 22:48:59,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:48:59,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26415410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:59,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:48:59,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 22:48:59,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395635005] [2021-12-15 22:48:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:59,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:48:59,797 INFO L87 Difference]: Start difference. First operand 34243 states and 41537 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:02,670 INFO L93 Difference]: Finished difference Result 71624 states and 86793 transitions. [2021-12-15 22:49:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:02,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 288 [2021-12-15 22:49:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:02,713 INFO L225 Difference]: With dead ends: 71624 [2021-12-15 22:49:02,714 INFO L226 Difference]: Without dead ends: 36591 [2021-12-15 22:49:02,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:49:02,741 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 854 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:02,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 944 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:49:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36591 states. [2021-12-15 22:49:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36591 to 35013. [2021-12-15 22:49:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.132725922540843) internal successors, (39659), 35012 states have internal predecessors, (39659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 39659 transitions. [2021-12-15 22:49:03,148 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 39659 transitions. Word has length 288 [2021-12-15 22:49:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:03,149 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 39659 transitions. [2021-12-15 22:49:03,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 39659 transitions. [2021-12-15 22:49:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 22:49:03,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:03,162 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:03,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 22:49:03,375 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 [2021-12-15 22:49:03,375 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash 609106699, now seen corresponding path program 1 times [2021-12-15 22:49:03,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:03,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600439319] [2021-12-15 22:49:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:03,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 315 proven. 110 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:49:03,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600439319] [2021-12-15 22:49:03,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600439319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:49:03,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973051540] [2021-12-15 22:49:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:03,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:49:03,615 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) [2021-12-15 22:49:03,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:49:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:49:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:49:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 22:49:04,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:49:04,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973051540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:04,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:49:04,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:49:04,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298374850] [2021-12-15 22:49:04,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:04,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:04,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:49:04,349 INFO L87 Difference]: Start difference. First operand 35013 states and 39659 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:07,655 INFO L93 Difference]: Finished difference Result 70832 states and 80144 transitions. [2021-12-15 22:49:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:49:07,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 402 [2021-12-15 22:49:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:07,695 INFO L225 Difference]: With dead ends: 70832 [2021-12-15 22:49:07,695 INFO L226 Difference]: Without dead ends: 36608 [2021-12-15 22:49:07,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:49:07,716 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 769 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:07,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1077 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 22:49:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36608 states. [2021-12-15 22:49:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36608 to 35013. [2021-12-15 22:49:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.0884839483605622) internal successors, (38110), 35012 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 38110 transitions. [2021-12-15 22:49:08,073 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 38110 transitions. Word has length 402 [2021-12-15 22:49:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:08,074 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 38110 transitions. [2021-12-15 22:49:08,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 38110 transitions. [2021-12-15 22:49:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-15 22:49:08,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:08,090 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:49:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:49:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:49:08,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash -70918865, now seen corresponding path program 1 times [2021-12-15 22:49:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963861750] [2021-12-15 22:49:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:08,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-15 22:49:08,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963861750] [2021-12-15 22:49:08,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963861750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:08,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:08,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:08,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229593696] [2021-12-15 22:49:08,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:08,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:49:08,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:08,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:49:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:49:08,449 INFO L87 Difference]: Start difference. First operand 35013 states and 38110 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:49:14,291 INFO L93 Difference]: Finished difference Result 104857 states and 114546 transitions. [2021-12-15 22:49:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:49:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 451 [2021-12-15 22:49:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:49:14,362 INFO L225 Difference]: With dead ends: 104857 [2021-12-15 22:49:14,362 INFO L226 Difference]: Without dead ends: 70633 [2021-12-15 22:49:14,387 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 [2021-12-15 22:49:14,388 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1705 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5987 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 5987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:49:14,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 796 Invalid, 7039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 5987 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 22:49:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70633 states. [2021-12-15 22:49:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70633 to 48407. [2021-12-15 22:49:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48407 states, 48406 states have (on average 1.0793496673966037) internal successors, (52247), 48406 states have internal predecessors, (52247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48407 states to 48407 states and 52247 transitions. [2021-12-15 22:49:14,927 INFO L78 Accepts]: Start accepts. Automaton has 48407 states and 52247 transitions. Word has length 451 [2021-12-15 22:49:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:49:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 48407 states and 52247 transitions. [2021-12-15 22:49:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:49:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 48407 states and 52247 transitions. [2021-12-15 22:49:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-15 22:49:14,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:49:14,944 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:49:14,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:49:14,944 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:49:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:49:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1887672211, now seen corresponding path program 1 times [2021-12-15 22:49:14,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:49:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849792899] [2021-12-15 22:49:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:49:14,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:49:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:49:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 22:49:15,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:49:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849792899] [2021-12-15 22:49:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849792899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:49:15,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:49:15,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:49:15,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400594129] [2021-12-15 22:49:15,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:49:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:49:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:49:15,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:49:15,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:49:15,120 INFO L87 Difference]: Start difference. First operand 48407 states and 52247 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)