./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.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 7ea381ec8ed14f66c767c1e3d74aca72e3c49fc21baf435ac33ef40352270e74 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:15:28,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:15:28,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:15:28,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:15:28,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:15:28,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:15:28,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:15:28,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:15:28,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:15:28,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:15:28,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:15:28,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:15:28,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:15:28,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:15:28,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:15:28,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:15:28,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:15:28,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:15:28,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:15:28,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:15:28,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:15:28,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:15:28,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:15:28,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:15:28,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:15:28,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:15:28,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:15:28,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:15:28,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:15:28,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:15:28,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:15:28,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:15:28,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:15:28,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:15:28,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:15:28,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:15:28,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:15:28,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:15:28,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:15:28,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:15:28,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:15:28,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:15:28,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:15:28,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:15:28,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:15:28,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:15:28,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:15:28,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:15:28,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:15:28,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:15:28,925 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:15:28,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:15:28,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:15:28,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:15:28,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:15:28,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:15:28,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:15:28,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:15:28,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:15:28,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:15:28,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:15:28,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:15:28,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:15:28,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:15:28,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:15:28,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:15:28,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:15:28,935 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:15:28,935 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:15:28,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:15:28,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ea381ec8ed14f66c767c1e3d74aca72e3c49fc21baf435ac33ef40352270e74 [2021-12-28 02:15:29,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:15:29,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:15:29,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:15:29,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:15:29,277 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:15:29,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-28 02:15:29,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3198b12f5/64054074474f475fb27a3a75beb723c1/FLAG89d7db480 [2021-12-28 02:15:29,929 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:15:29,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-28 02:15:29,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3198b12f5/64054074474f475fb27a3a75beb723c1/FLAG89d7db480 [2021-12-28 02:15:30,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3198b12f5/64054074474f475fb27a3a75beb723c1 [2021-12-28 02:15:30,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:15:30,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:15:30,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:15:30,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:15:30,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:15:30,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:15:30" (1/1) ... [2021-12-28 02:15:30,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40213a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:30, skipping insertion in model container [2021-12-28 02:15:30,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:15:30" (1/1) ... [2021-12-28 02:15:30,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:15:30,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:15:30,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[6524,6537] [2021-12-28 02:15:30,813 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[14272,14285] [2021-12-28 02:15:31,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:15:31,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:15:31,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[6524,6537] [2021-12-28 02:15:31,400 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[14272,14285] [2021-12-28 02:15:31,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:15:31,730 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:15:31,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31 WrapperNode [2021-12-28 02:15:31,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:15:31,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:15:31,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:15:31,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:15:31,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:31,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,150 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4974 [2021-12-28 02:15:32,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:15:32,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:15:32,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:15:32,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:15:32,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:15:32,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:15:32,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:15:32,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:15:32,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (1/1) ... [2021-12-28 02:15:32,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:15:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:15:32,596 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) [2021-12-28 02:15:32,614 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 [2021-12-28 02:15:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:15:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:15:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:15:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:15:32,740 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:15:32,741 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:15:35,574 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:15:35,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:15:35,585 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 02:15:35,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:15:35 BoogieIcfgContainer [2021-12-28 02:15:35,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:15:35,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:15:35,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:15:35,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:15:35,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:15:30" (1/3) ... [2021-12-28 02:15:35,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:15:35, skipping insertion in model container [2021-12-28 02:15:35,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:15:31" (2/3) ... [2021-12-28 02:15:35,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:15:35, skipping insertion in model container [2021-12-28 02:15:35,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:15:35" (3/3) ... [2021-12-28 02:15:35,593 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-28 02:15:35,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:15:35,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:15:35,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:15:35,634 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 [2021-12-28 02:15:35,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:15:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 02:15:35,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:35,661 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] [2021-12-28 02:15:35,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-12-28 02:15:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913819176] [2021-12-28 02:15:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:35,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:35,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:35,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913819176] [2021-12-28 02:15:35,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913819176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:35,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 02:15:35,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962910230] [2021-12-28 02:15:35,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:35,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 02:15:35,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 02:15:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 02:15:35,840 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:35,905 INFO L93 Difference]: Finished difference Result 1732 states and 3290 transitions. [2021-12-28 02:15:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 02:15:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-28 02:15:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:35,920 INFO L225 Difference]: With dead ends: 1732 [2021-12-28 02:15:35,920 INFO L226 Difference]: Without dead ends: 812 [2021-12-28 02:15:35,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 02:15:35,928 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:35,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-28 02:15:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-12-28 02:15:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-12-28 02:15:35,998 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-12-28 02:15:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-12-28 02:15:35,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-12-28 02:15:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 02:15:36,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,002 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] [2021-12-28 02:15:36,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:15:36,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-28 02:15:36,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470572636] [2021-12-28 02:15:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470572636] [2021-12-28 02:15:36,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470572636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:36,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144596976] [2021-12-28 02:15:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:36,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:36,083 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,174 INFO L93 Difference]: Finished difference Result 852 states and 1593 transitions. [2021-12-28 02:15:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:15:36,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-28 02:15:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,180 INFO L225 Difference]: With dead ends: 852 [2021-12-28 02:15:36,181 INFO L226 Difference]: Without dead ends: 812 [2021-12-28 02:15:36,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:15:36,186 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3 mSDsluCounter, 4574 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-28 02:15:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-12-28 02:15:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-12-28 02:15:36,230 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-12-28 02:15:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:36,230 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-12-28 02:15:36,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-12-28 02:15:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 02:15:36,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,238 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] [2021-12-28 02:15:36,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:15:36,239 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-28 02:15:36,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155622492] [2021-12-28 02:15:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155622492] [2021-12-28 02:15:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155622492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:36,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605764872] [2021-12-28 02:15:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:36,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:36,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:36,342 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,364 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-12-28 02:15:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-28 02:15:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,367 INFO L225 Difference]: With dead ends: 878 [2021-12-28 02:15:36,368 INFO L226 Difference]: Without dead ends: 842 [2021-12-28 02:15:36,368 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 [2021-12-28 02:15:36,369 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-28 02:15:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-12-28 02:15:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-12-28 02:15:36,386 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-12-28 02:15:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:36,386 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-12-28 02:15:36,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-12-28 02:15:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 02:15:36,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,387 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] [2021-12-28 02:15:36,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:15:36,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-28 02:15:36,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840614707] [2021-12-28 02:15:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840614707] [2021-12-28 02:15:36,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840614707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:36,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572596006] [2021-12-28 02:15:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:36,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:36,444 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,546 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-12-28 02:15:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:15:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-28 02:15:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,550 INFO L225 Difference]: With dead ends: 1224 [2021-12-28 02:15:36,551 INFO L226 Difference]: Without dead ends: 1160 [2021-12-28 02:15:36,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:15:36,552 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-12-28 02:15:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-12-28 02:15:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-12-28 02:15:36,610 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-12-28 02:15:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:36,610 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-12-28 02:15:36,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-12-28 02:15:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:15:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,611 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] [2021-12-28 02:15:36,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:15:36,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-28 02:15:36,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009298146] [2021-12-28 02:15:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009298146] [2021-12-28 02:15:36,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009298146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:36,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836907866] [2021-12-28 02:15:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:36,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:36,659 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,695 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-12-28 02:15:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:36,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-28 02:15:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,700 INFO L225 Difference]: With dead ends: 1089 [2021-12-28 02:15:36,700 INFO L226 Difference]: Without dead ends: 963 [2021-12-28 02:15:36,701 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 [2021-12-28 02:15:36,702 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-28 02:15:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-12-28 02:15:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-12-28 02:15:36,726 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-12-28 02:15:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:36,727 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-12-28 02:15:36,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-12-28 02:15:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:15:36,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,728 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] [2021-12-28 02:15:36,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:15:36,728 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-28 02:15:36,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745532133] [2021-12-28 02:15:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745532133] [2021-12-28 02:15:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745532133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278212282] [2021-12-28 02:15:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:36,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:36,825 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,882 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-12-28 02:15:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:15:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-28 02:15:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,887 INFO L225 Difference]: With dead ends: 1146 [2021-12-28 02:15:36,887 INFO L226 Difference]: Without dead ends: 963 [2021-12-28 02:15:36,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:15:36,888 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 3002 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3002 Valid, 1636 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-28 02:15:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-12-28 02:15:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-12-28 02:15:36,907 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-12-28 02:15:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:36,908 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-12-28 02:15:36,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-12-28 02:15:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:15:36,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:36,909 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] [2021-12-28 02:15:36,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:15:36,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-28 02:15:36,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476767511] [2021-12-28 02:15:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:36,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:36,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476767511] [2021-12-28 02:15:36,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476767511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:36,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:36,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:36,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851388739] [2021-12-28 02:15:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:36,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:36,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:36,954 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:36,984 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-12-28 02:15:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-28 02:15:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:36,989 INFO L225 Difference]: With dead ends: 1291 [2021-12-28 02:15:36,989 INFO L226 Difference]: Without dead ends: 1108 [2021-12-28 02:15:36,989 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 [2021-12-28 02:15:36,992 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:36,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-28 02:15:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-12-28 02:15:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-12-28 02:15:37,021 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-12-28 02:15:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-12-28 02:15:37,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-12-28 02:15:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:15:37,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:37,024 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] [2021-12-28 02:15:37,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:15:37,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-28 02:15:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848549823] [2021-12-28 02:15:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:37,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:37,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:37,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848549823] [2021-12-28 02:15:37,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848549823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:37,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:37,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:37,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722468495] [2021-12-28 02:15:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:37,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:37,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:37,059 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:37,096 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-12-28 02:15:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-28 02:15:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:37,101 INFO L225 Difference]: With dead ends: 1690 [2021-12-28 02:15:37,101 INFO L226 Difference]: Without dead ends: 1362 [2021-12-28 02:15:37,102 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 [2021-12-28 02:15:37,102 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:37,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-12-28 02:15:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-12-28 02:15:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-12-28 02:15:37,143 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-12-28 02:15:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:37,143 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-12-28 02:15:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-12-28 02:15:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:15:37,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:37,144 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] [2021-12-28 02:15:37,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:15:37,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-28 02:15:37,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:37,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139007701] [2021-12-28 02:15:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:37,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:37,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139007701] [2021-12-28 02:15:37,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139007701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:37,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:37,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:15:37,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584920663] [2021-12-28 02:15:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:37,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:15:37,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:15:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:15:37,223 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:37,391 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-12-28 02:15:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:15:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-28 02:15:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:37,399 INFO L225 Difference]: With dead ends: 1883 [2021-12-28 02:15:37,399 INFO L226 Difference]: Without dead ends: 1881 [2021-12-28 02:15:37,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:15:37,401 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 424 mSDsluCounter, 8903 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 10434 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:37,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 10434 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-12-28 02:15:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-12-28 02:15:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-12-28 02:15:37,454 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-12-28 02:15:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-12-28 02:15:37,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-12-28 02:15:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 02:15:37,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:37,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:37,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:15:37,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-28 02:15:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:37,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361491582] [2021-12-28 02:15:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:37,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 02:15:37,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361491582] [2021-12-28 02:15:37,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361491582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:37,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:37,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:37,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308022076] [2021-12-28 02:15:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:37,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:37,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:37,537 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:37,685 INFO L93 Difference]: Finished difference Result 3436 states and 5200 transitions. [2021-12-28 02:15:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:15:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 64 [2021-12-28 02:15:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:37,693 INFO L225 Difference]: With dead ends: 3436 [2021-12-28 02:15:37,693 INFO L226 Difference]: Without dead ends: 2806 [2021-12-28 02:15:37,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:15:37,696 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3073 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:37,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 3184 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-12-28 02:15:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2036. [2021-12-28 02:15:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2034 states have (on average 1.5870206489675516) internal successors, (3228), 2035 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 3228 transitions. [2021-12-28 02:15:37,788 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 3228 transitions. Word has length 64 [2021-12-28 02:15:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:37,789 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 3228 transitions. [2021-12-28 02:15:37,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 3228 transitions. [2021-12-28 02:15:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 02:15:37,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:37,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:37,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:15:37,790 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-28 02:15:37,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635275609] [2021-12-28 02:15:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:37,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:15:37,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635275609] [2021-12-28 02:15:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635275609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:37,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546482904] [2021-12-28 02:15:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:37,828 INFO L87 Difference]: Start difference. First operand 2036 states and 3228 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:38,005 INFO L93 Difference]: Finished difference Result 4064 states and 6076 transitions. [2021-12-28 02:15:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:15:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 64 [2021-12-28 02:15:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:38,020 INFO L225 Difference]: With dead ends: 4064 [2021-12-28 02:15:38,020 INFO L226 Difference]: Without dead ends: 3434 [2021-12-28 02:15:38,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:15:38,024 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3067 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 3203 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:38,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3067 Valid, 3203 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-12-28 02:15:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2980. [2021-12-28 02:15:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2978 states have (on average 1.5218267293485561) internal successors, (4532), 2979 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 4532 transitions. [2021-12-28 02:15:38,238 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 4532 transitions. Word has length 64 [2021-12-28 02:15:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:38,239 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 4532 transitions. [2021-12-28 02:15:38,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 4532 transitions. [2021-12-28 02:15:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 02:15:38,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:38,241 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:15:38,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:15:38,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-28 02:15:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893576581] [2021-12-28 02:15:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:38,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:15:38,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893576581] [2021-12-28 02:15:38,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893576581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:38,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:38,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:38,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638970006] [2021-12-28 02:15:38,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:38,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:15:38,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:15:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:15:38,288 INFO L87 Difference]: Start difference. First operand 2980 states and 4532 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:38,523 INFO L93 Difference]: Finished difference Result 4332 states and 6456 transitions. [2021-12-28 02:15:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:15:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 64 [2021-12-28 02:15:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:38,536 INFO L225 Difference]: With dead ends: 4332 [2021-12-28 02:15:38,536 INFO L226 Difference]: Without dead ends: 3882 [2021-12-28 02:15:38,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:15:38,539 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:38,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-12-28 02:15:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3428. [2021-12-28 02:15:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3426 states have (on average 1.5072971395213077) internal successors, (5164), 3427 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5164 transitions. [2021-12-28 02:15:38,754 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5164 transitions. Word has length 64 [2021-12-28 02:15:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 5164 transitions. [2021-12-28 02:15:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5164 transitions. [2021-12-28 02:15:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:15:38,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:38,757 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:15:38,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:15:38,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-28 02:15:38,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:38,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49838658] [2021-12-28 02:15:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:38,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:38,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49838658] [2021-12-28 02:15:38,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49838658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:38,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:38,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:38,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103048491] [2021-12-28 02:15:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:38,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:38,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:38,792 INFO L87 Difference]: Start difference. First operand 3428 states and 5164 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:39,031 INFO L93 Difference]: Finished difference Result 6080 states and 8866 transitions. [2021-12-28 02:15:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:39,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-28 02:15:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:39,044 INFO L225 Difference]: With dead ends: 6080 [2021-12-28 02:15:39,044 INFO L226 Difference]: Without dead ends: 3430 [2021-12-28 02:15:39,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:39,049 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:39,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-12-28 02:15:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3428. [2021-12-28 02:15:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3426 states have (on average 1.4927028604786923) internal successors, (5114), 3427 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5114 transitions. [2021-12-28 02:15:39,272 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5114 transitions. Word has length 65 [2021-12-28 02:15:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:39,273 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 5114 transitions. [2021-12-28 02:15:39,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5114 transitions. [2021-12-28 02:15:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:15:39,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:39,274 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:15:39,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:15:39,275 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-28 02:15:39,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:39,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699783891] [2021-12-28 02:15:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:39,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:39,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:39,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699783891] [2021-12-28 02:15:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699783891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:39,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015742518] [2021-12-28 02:15:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:39,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:39,305 INFO L87 Difference]: Start difference. First operand 3428 states and 5114 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:39,403 INFO L93 Difference]: Finished difference Result 4756 states and 6941 transitions. [2021-12-28 02:15:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-28 02:15:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:39,408 INFO L225 Difference]: With dead ends: 4756 [2021-12-28 02:15:39,408 INFO L226 Difference]: Without dead ends: 2106 [2021-12-28 02:15:39,412 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 [2021-12-28 02:15:39,412 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:39,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-12-28 02:15:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2104. [2021-12-28 02:15:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2102 states have (on average 1.5528068506184587) internal successors, (3264), 2103 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3264 transitions. [2021-12-28 02:15:39,502 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3264 transitions. Word has length 65 [2021-12-28 02:15:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:39,502 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 3264 transitions. [2021-12-28 02:15:39,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3264 transitions. [2021-12-28 02:15:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:15:39,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:39,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:39,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:15:39,503 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-28 02:15:39,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:39,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123152873] [2021-12-28 02:15:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:39,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:39,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:39,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123152873] [2021-12-28 02:15:39,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123152873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:15:39,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792271919] [2021-12-28 02:15:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:39,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:15:39,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:15:39,708 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) [2021-12-28 02:15:39,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:15:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:15:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:15:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:15:40,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:15:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:15:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792271919] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:15:40,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:15:40,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-28 02:15:40,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12256774] [2021-12-28 02:15:40,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:15:40,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 02:15:40,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 02:15:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:15:40,266 INFO L87 Difference]: Start difference. First operand 2104 states and 3264 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:43,962 INFO L93 Difference]: Finished difference Result 13969 states and 19009 transitions. [2021-12-28 02:15:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-28 02:15:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-28 02:15:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:43,985 INFO L225 Difference]: With dead ends: 13969 [2021-12-28 02:15:43,985 INFO L226 Difference]: Without dead ends: 12643 [2021-12-28 02:15:43,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3478 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1620, Invalid=8082, Unknown=0, NotChecked=0, Total=9702 [2021-12-28 02:15:43,992 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 16470 mSDsluCounter, 5175 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16470 SdHoareTripleChecker+Valid, 6732 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:43,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16470 Valid, 6732 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:15:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2021-12-28 02:15:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8585. [2021-12-28 02:15:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8585 states, 8583 states have (on average 1.365373412559711) internal successors, (11719), 8584 states have internal predecessors, (11719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8585 states to 8585 states and 11719 transitions. [2021-12-28 02:15:44,586 INFO L78 Accepts]: Start accepts. Automaton has 8585 states and 11719 transitions. Word has length 65 [2021-12-28 02:15:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:44,586 INFO L470 AbstractCegarLoop]: Abstraction has 8585 states and 11719 transitions. [2021-12-28 02:15:44,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8585 states and 11719 transitions. [2021-12-28 02:15:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:15:44,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:44,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:44,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:15:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 02:15:44,809 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-28 02:15:44,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487479429] [2021-12-28 02:15:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:44,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:44,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487479429] [2021-12-28 02:15:44,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487479429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:15:44,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159784780] [2021-12-28 02:15:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:44,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:15:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:15:44,938 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) [2021-12-28 02:15:44,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:15:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 02:15:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:15:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:45,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:15:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159784780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:15:46,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:15:46,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-28 02:15:46,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286976902] [2021-12-28 02:15:46,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:15:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-28 02:15:46,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-28 02:15:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-28 02:15:46,149 INFO L87 Difference]: Start difference. First operand 8585 states and 11719 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:59,860 INFO L93 Difference]: Finished difference Result 122089 states and 157892 transitions. [2021-12-28 02:15:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-28 02:15:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 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 66 [2021-12-28 02:15:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:00,125 INFO L225 Difference]: With dead ends: 122089 [2021-12-28 02:16:00,126 INFO L226 Difference]: Without dead ends: 114282 [2021-12-28 02:16:00,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7739 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3290, Invalid=19060, Unknown=0, NotChecked=0, Total=22350 [2021-12-28 02:16:00,164 INFO L933 BasicCegarLoop]: 1623 mSDtfsCounter, 21495 mSDsluCounter, 9039 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21495 SdHoareTripleChecker+Valid, 10662 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:00,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21495 Valid, 10662 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:16:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114282 states. [2021-12-28 02:16:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114282 to 39515. [2021-12-28 02:16:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39515 states, 39513 states have (on average 1.2994204439045378) internal successors, (51344), 39514 states have internal predecessors, (51344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39515 states to 39515 states and 51344 transitions. [2021-12-28 02:16:04,531 INFO L78 Accepts]: Start accepts. Automaton has 39515 states and 51344 transitions. Word has length 66 [2021-12-28 02:16:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:04,532 INFO L470 AbstractCegarLoop]: Abstraction has 39515 states and 51344 transitions. [2021-12-28 02:16:04,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 39515 states and 51344 transitions. [2021-12-28 02:16:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:16:04,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:04,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:16:04,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:16:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 02:16:04,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-28 02:16:04,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479657340] [2021-12-28 02:16:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:04,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:16:04,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479657340] [2021-12-28 02:16:04,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479657340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:16:04,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:16:04,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:16:04,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267732644] [2021-12-28 02:16:04,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:16:04,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:16:04,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:16:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:16:04,790 INFO L87 Difference]: Start difference. First operand 39515 states and 51344 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:16:06,753 INFO L93 Difference]: Finished difference Result 57754 states and 74645 transitions. [2021-12-28 02:16:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:16:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-28 02:16:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:06,780 INFO L225 Difference]: With dead ends: 57754 [2021-12-28 02:16:06,780 INFO L226 Difference]: Without dead ends: 19017 [2021-12-28 02:16:06,804 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 [2021-12-28 02:16:06,805 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:16:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19017 states. [2021-12-28 02:16:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19017 to 17638. [2021-12-28 02:16:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17638 states, 17636 states have (on average 1.281980040825584) internal successors, (22609), 17637 states have internal predecessors, (22609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17638 states to 17638 states and 22609 transitions. [2021-12-28 02:16:08,341 INFO L78 Accepts]: Start accepts. Automaton has 17638 states and 22609 transitions. Word has length 66 [2021-12-28 02:16:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:08,341 INFO L470 AbstractCegarLoop]: Abstraction has 17638 states and 22609 transitions. [2021-12-28 02:16:08,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17638 states and 22609 transitions. [2021-12-28 02:16:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:16:08,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:08,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:16:08,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:16:08,344 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-28 02:16:08,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:08,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653080254] [2021-12-28 02:16:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:08,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:16:08,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:08,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653080254] [2021-12-28 02:16:08,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653080254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:16:08,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:16:08,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:16:08,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486769822] [2021-12-28 02:16:08,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:16:08,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:16:08,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:08,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:16:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:16:08,457 INFO L87 Difference]: Start difference. First operand 17638 states and 22609 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:16:10,125 INFO L93 Difference]: Finished difference Result 31781 states and 40480 transitions. [2021-12-28 02:16:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:16:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 66 [2021-12-28 02:16:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:10,148 INFO L225 Difference]: With dead ends: 31781 [2021-12-28 02:16:10,148 INFO L226 Difference]: Without dead ends: 14998 [2021-12-28 02:16:10,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:16:10,166 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4498 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:10,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 2965 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:16:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14998 states. [2021-12-28 02:16:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14998 to 14998. [2021-12-28 02:16:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14998 states, 14996 states have (on average 1.2658042144571886) internal successors, (18982), 14997 states have internal predecessors, (18982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 18982 transitions. [2021-12-28 02:16:11,532 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 18982 transitions. Word has length 66 [2021-12-28 02:16:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:11,534 INFO L470 AbstractCegarLoop]: Abstraction has 14998 states and 18982 transitions. [2021-12-28 02:16:11,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 18982 transitions. [2021-12-28 02:16:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:16:11,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:11,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:16:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:16:11,537 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-28 02:16:11,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21319690] [2021-12-28 02:16:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:11,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 02:16:11,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21319690] [2021-12-28 02:16:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21319690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:16:11,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:16:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:16:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969033134] [2021-12-28 02:16:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:16:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:16:11,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:16:11,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:16:11,593 INFO L87 Difference]: Start difference. First operand 14998 states and 18982 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:16:12,719 INFO L93 Difference]: Finished difference Result 25541 states and 32009 transitions. [2021-12-28 02:16:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:16:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 66 [2021-12-28 02:16:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:12,736 INFO L225 Difference]: With dead ends: 25541 [2021-12-28 02:16:12,736 INFO L226 Difference]: Without dead ends: 11434 [2021-12-28 02:16:12,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:16:12,748 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4546 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4546 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:12,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4546 Valid, 2952 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:16:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-12-28 02:16:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 11434. [2021-12-28 02:16:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11434 states, 11432 states have (on average 1.2539363191042687) internal successors, (14335), 11433 states have internal predecessors, (14335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 14335 transitions. [2021-12-28 02:16:13,781 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 14335 transitions. Word has length 66 [2021-12-28 02:16:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:13,781 INFO L470 AbstractCegarLoop]: Abstraction has 11434 states and 14335 transitions. [2021-12-28 02:16:13,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 14335 transitions. [2021-12-28 02:16:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:16:13,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:13,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:16:13,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:16:13,788 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-28 02:16:13,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:13,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123335145] [2021-12-28 02:16:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:13,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:16:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123335145] [2021-12-28 02:16:13,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123335145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:16:13,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:16:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:16:13,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968955090] [2021-12-28 02:16:13,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:16:13,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:16:13,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:16:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:16:13,850 INFO L87 Difference]: Start difference. First operand 11434 states and 14335 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:16:14,842 INFO L93 Difference]: Finished difference Result 19736 states and 24452 transitions. [2021-12-28 02:16:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:16:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 66 [2021-12-28 02:16:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:14,873 INFO L225 Difference]: With dead ends: 19736 [2021-12-28 02:16:14,873 INFO L226 Difference]: Without dead ends: 9116 [2021-12-28 02:16:14,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:16:14,886 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4510 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:14,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:16:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-12-28 02:16:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 9116. [2021-12-28 02:16:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9116 states, 9114 states have (on average 1.2545534342769367) internal successors, (11434), 9115 states have internal predecessors, (11434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9116 states to 9116 states and 11434 transitions. [2021-12-28 02:16:15,907 INFO L78 Accepts]: Start accepts. Automaton has 9116 states and 11434 transitions. Word has length 66 [2021-12-28 02:16:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:15,907 INFO L470 AbstractCegarLoop]: Abstraction has 9116 states and 11434 transitions. [2021-12-28 02:16:15,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9116 states and 11434 transitions. [2021-12-28 02:16:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:16:15,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:15,908 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:16:15,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:16:15,909 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-28 02:16:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986076202] [2021-12-28 02:16:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:15,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:16:16,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986076202] [2021-12-28 02:16:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986076202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:16:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782183714] [2021-12-28 02:16:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:16,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:16:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:16:16,235 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) [2021-12-28 02:16:16,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:16:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:16,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 02:16:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:16:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:16:17,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:16:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:16:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782183714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:16:18,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:16:18,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2021-12-28 02:16:18,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509904805] [2021-12-28 02:16:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:16:18,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 02:16:18,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 02:16:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-12-28 02:16:18,688 INFO L87 Difference]: Start difference. First operand 9116 states and 11434 transitions. Second operand has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:16:28,053 INFO L93 Difference]: Finished difference Result 18544 states and 22563 transitions. [2021-12-28 02:16:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-28 02:16:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 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 67 [2021-12-28 02:16:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:16:28,070 INFO L225 Difference]: With dead ends: 18544 [2021-12-28 02:16:28,070 INFO L226 Difference]: Without dead ends: 13200 [2021-12-28 02:16:28,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1888, Invalid=9884, Unknown=0, NotChecked=0, Total=11772 [2021-12-28 02:16:28,078 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 8573 mSDsluCounter, 27446 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8573 SdHoareTripleChecker+Valid, 29174 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:16:28,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8573 Valid, 29174 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:16:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13200 states. [2021-12-28 02:16:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13200 to 6190. [2021-12-28 02:16:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6190 states, 6188 states have (on average 1.278765352294764) internal successors, (7913), 6189 states have internal predecessors, (7913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6190 states to 6190 states and 7913 transitions. [2021-12-28 02:16:28,950 INFO L78 Accepts]: Start accepts. Automaton has 6190 states and 7913 transitions. Word has length 67 [2021-12-28 02:16:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:16:28,950 INFO L470 AbstractCegarLoop]: Abstraction has 6190 states and 7913 transitions. [2021-12-28 02:16:28,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:16:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6190 states and 7913 transitions. [2021-12-28 02:16:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:16:28,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:16:28,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:16:28,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 02:16:29,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:16:29,165 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:16:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:16:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash 531431905, now seen corresponding path program 1 times [2021-12-28 02:16:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:16:29,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164915207] [2021-12-28 02:16:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:16:29,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:16:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:16:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:16:29,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:16:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164915207] [2021-12-28 02:16:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164915207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:16:29,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:16:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:16:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677574375] [2021-12-28 02:16:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:16:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:16:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:16:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:16:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:16:29,235 INFO L87 Difference]: Start difference. First operand 6190 states and 7913 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)