./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label54.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 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:47:51,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:47:51,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:47:51,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:47:51,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:47:51,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:47:51,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:47:51,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:47:51,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:47:51,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:47:51,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:47:51,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:47:51,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:47:51,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:47:51,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:47:51,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:47:51,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:47:51,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:47:51,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:47:51,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:47:51,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:47:51,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:47:51,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:47:51,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:47:51,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:47:51,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:47:51,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:47:51,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:47:51,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:47:51,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:47:51,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:47:51,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:47:51,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:47:51,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:47:51,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:47:51,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:47:51,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:47:51,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:47:51,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:47:51,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:47:51,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:47:51,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:47:51,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:47:51,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:47:51,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:47:51,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:47:51,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:47:51,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:47:51,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:47:51,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:47:51,861 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:47:51,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:47:51,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:47:51,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:47:51,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:47:51,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:47:51,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:47:51,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:47:51,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:47:51,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:47:51,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:47:51,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:47:51,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:47:51,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:47:51,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:47:51,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:47:51,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:47:51,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:47:51,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:47:51,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:47:51,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d [2021-12-15 22:47:52,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:47:52,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:47:52,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:47:52,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:47:52,091 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:47:52,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-15 22:47:52,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0e0001/a34845bc1d164cfc968e69c774b9e917/FLAG3d3838af4 [2021-12-15 22:47:52,770 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:47:52,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-15 22:47:52,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0e0001/a34845bc1d164cfc968e69c774b9e917/FLAG3d3838af4 [2021-12-15 22:47:53,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0e0001/a34845bc1d164cfc968e69c774b9e917 [2021-12-15 22:47:53,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:47:53,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:47:53,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:47:53,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:47:53,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:47:53,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:53" (1/1) ... [2021-12-15 22:47:53,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161dda48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:53, skipping insertion in model container [2021-12-15 22:47:53,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:53" (1/1) ... [2021-12-15 22:47:53,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:47:53,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:47:53,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c[4044,4057] [2021-12-15 22:47:54,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:47:54,207 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:47:54,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c[4044,4057] [2021-12-15 22:47:54,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:47:54,592 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:47:54,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54 WrapperNode [2021-12-15 22:47:54,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:47:54,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:47:54,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:47:54,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:47:54,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:54,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,119 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:47:55,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:47:55,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:47:55,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:47:55,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:47:55,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:47:55,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:47:55,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:47:55,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:47:55,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (1/1) ... [2021-12-15 22:47:55,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:47:55,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:47:55,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:47:55,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:47:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:47:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:47:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:47:55,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:47:55,950 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:47:55,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:47:59,561 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:47:59,582 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:47:59,582 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:47:59,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:59 BoogieIcfgContainer [2021-12-15 22:47:59,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:47:59,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:47:59,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:47:59,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:47:59,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:47:53" (1/3) ... [2021-12-15 22:47:59,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5424b3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:59, skipping insertion in model container [2021-12-15 22:47:59,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:54" (2/3) ... [2021-12-15 22:47:59,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5424b3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:59, skipping insertion in model container [2021-12-15 22:47:59,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:59" (3/3) ... [2021-12-15 22:47:59,593 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2021-12-15 22:47:59,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:47:59,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:47:59,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:47:59,642 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:47:59,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:47:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 22:47:59,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:59,677 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] [2021-12-15 22:47:59,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-12-15 22:47:59,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28246622] [2021-12-15 22:47:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:59,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:47:59,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28246622] [2021-12-15 22:47:59,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28246622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:59,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:59,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:59,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22271274] [2021-12-15 22:47:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:59,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:59,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:59,894 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:03,371 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-15 22:48:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-15 22:48:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:03,407 INFO L225 Difference]: With dead ends: 3035 [2021-12-15 22:48:03,407 INFO L226 Difference]: Without dead ends: 1873 [2021-12-15 22:48:03,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:03,425 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 878 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:03,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 22:48:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-15 22:48:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-15 22:48:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-15 22:48:03,504 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 27 [2021-12-15 22:48:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:03,504 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-15 22:48:03,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-15 22:48:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 22:48:03,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:03,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:03,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:48:03,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:03,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1328079915, now seen corresponding path program 1 times [2021-12-15 22:48:03,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:03,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004903331] [2021-12-15 22:48:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:03,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:03,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:03,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004903331] [2021-12-15 22:48:03,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004903331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:03,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:03,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:03,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554386485] [2021-12-15 22:48:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:03,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:03,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:03,592 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:07,455 INFO L93 Difference]: Finished difference Result 5405 states and 8404 transitions. [2021-12-15 22:48:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-15 22:48:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:07,467 INFO L225 Difference]: With dead ends: 5405 [2021-12-15 22:48:07,467 INFO L226 Difference]: Without dead ends: 3548 [2021-12-15 22:48:07,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:07,470 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 862 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:07,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1040 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 22:48:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-12-15 22:48:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3476. [2021-12-15 22:48:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 1.4897841726618706) internal successors, (5177), 3475 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 5177 transitions. [2021-12-15 22:48:07,516 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 5177 transitions. Word has length 99 [2021-12-15 22:48:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:07,517 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 5177 transitions. [2021-12-15 22:48:07,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 5177 transitions. [2021-12-15 22:48:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 22:48:07,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:07,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:48:07,520 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash -36066970, now seen corresponding path program 1 times [2021-12-15 22:48:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38979484] [2021-12-15 22:48:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:07,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:07,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38979484] [2021-12-15 22:48:07,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38979484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:07,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:07,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:07,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655008690] [2021-12-15 22:48:07,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:07,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:07,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:07,651 INFO L87 Difference]: Start difference. First operand 3476 states and 5177 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:10,723 INFO L93 Difference]: Finished difference Result 10142 states and 15129 transitions. [2021-12-15 22:48:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-15 22:48:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:10,744 INFO L225 Difference]: With dead ends: 10142 [2021-12-15 22:48:10,745 INFO L226 Difference]: Without dead ends: 6668 [2021-12-15 22:48:10,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:10,757 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 962 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:10,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 850 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:48:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2021-12-15 22:48:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 6659. [2021-12-15 22:48:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.364373685791529) internal successors, (9084), 6658 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9084 transitions. [2021-12-15 22:48:10,862 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9084 transitions. Word has length 113 [2021-12-15 22:48:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:10,863 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9084 transitions. [2021-12-15 22:48:10,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9084 transitions. [2021-12-15 22:48:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 22:48:10,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:10,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:10,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:48:10,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1462501558, now seen corresponding path program 1 times [2021-12-15 22:48:10,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:10,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685064481] [2021-12-15 22:48:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:10,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:10,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:10,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685064481] [2021-12-15 22:48:10,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685064481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:10,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:10,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:10,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850788418] [2021-12-15 22:48:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:10,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:10,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:10,976 INFO L87 Difference]: Start difference. First operand 6659 states and 9084 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:13,949 INFO L93 Difference]: Finished difference Result 16505 states and 23199 transitions. [2021-12-15 22:48:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-15 22:48:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:13,980 INFO L225 Difference]: With dead ends: 16505 [2021-12-15 22:48:13,980 INFO L226 Difference]: Without dead ends: 9848 [2021-12-15 22:48:13,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:13,998 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 997 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:13,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 907 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:48:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-12-15 22:48:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9836. [2021-12-15 22:48:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9836 states, 9835 states have (on average 1.3705134722928318) internal successors, (13479), 9835 states have internal predecessors, (13479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9836 states to 9836 states and 13479 transitions. [2021-12-15 22:48:14,135 INFO L78 Accepts]: Start accepts. Automaton has 9836 states and 13479 transitions. Word has length 116 [2021-12-15 22:48:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:14,136 INFO L470 AbstractCegarLoop]: Abstraction has 9836 states and 13479 transitions. [2021-12-15 22:48:14,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9836 states and 13479 transitions. [2021-12-15 22:48:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-15 22:48:14,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:14,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:14,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:48:14,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1411141186, now seen corresponding path program 1 times [2021-12-15 22:48:14,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:14,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799354451] [2021-12-15 22:48:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:14,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:14,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:14,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799354451] [2021-12-15 22:48:14,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799354451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:14,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:14,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:48:14,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827229427] [2021-12-15 22:48:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:14,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:48:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:48:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:14,424 INFO L87 Difference]: Start difference. First operand 9836 states and 13479 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:17,768 INFO L93 Difference]: Finished difference Result 20498 states and 27849 transitions. [2021-12-15 22:48:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:48:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-15 22:48:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:17,819 INFO L225 Difference]: With dead ends: 20498 [2021-12-15 22:48:17,820 INFO L226 Difference]: Without dead ends: 10664 [2021-12-15 22:48:17,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:48:17,829 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 2251 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:17,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 2643 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 22:48:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10664 states. [2021-12-15 22:48:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10664 to 10623. [2021-12-15 22:48:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10622 states have (on average 1.3435322914705328) internal successors, (14271), 10622 states have internal predecessors, (14271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 14271 transitions. [2021-12-15 22:48:17,974 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 14271 transitions. Word has length 132 [2021-12-15 22:48:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:17,975 INFO L470 AbstractCegarLoop]: Abstraction has 10623 states and 14271 transitions. [2021-12-15 22:48:17,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 14271 transitions. [2021-12-15 22:48:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 22:48:17,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:17,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:17,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:48:17,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -869470445, now seen corresponding path program 1 times [2021-12-15 22:48:17,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:17,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176535271] [2021-12-15 22:48:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:17,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 22:48:18,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176535271] [2021-12-15 22:48:18,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176535271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:18,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:18,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:18,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53236986] [2021-12-15 22:48:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:18,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:18,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:18,066 INFO L87 Difference]: Start difference. First operand 10623 states and 14271 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:20,841 INFO L93 Difference]: Finished difference Result 29899 states and 40703 transitions. [2021-12-15 22:48:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 195 [2021-12-15 22:48:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:20,870 INFO L225 Difference]: With dead ends: 29899 [2021-12-15 22:48:20,871 INFO L226 Difference]: Without dead ends: 20065 [2021-12-15 22:48:20,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:20,883 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 887 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:20,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 998 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:48:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-12-15 22:48:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 19274. [2021-12-15 22:48:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19274 states, 19273 states have (on average 1.2405956519483214) internal successors, (23910), 19273 states have internal predecessors, (23910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19274 states to 19274 states and 23910 transitions. [2021-12-15 22:48:21,077 INFO L78 Accepts]: Start accepts. Automaton has 19274 states and 23910 transitions. Word has length 195 [2021-12-15 22:48:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:21,077 INFO L470 AbstractCegarLoop]: Abstraction has 19274 states and 23910 transitions. [2021-12-15 22:48:21,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19274 states and 23910 transitions. [2021-12-15 22:48:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-15 22:48:21,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:21,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:21,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:48:21,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1420967643, now seen corresponding path program 1 times [2021-12-15 22:48:21,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:21,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628313885] [2021-12-15 22:48:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:21,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:21,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628313885] [2021-12-15 22:48:21,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628313885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:21,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:21,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156246328] [2021-12-15 22:48:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:21,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:21,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:21,233 INFO L87 Difference]: Start difference. First operand 19274 states and 23910 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:23,725 INFO L93 Difference]: Finished difference Result 44068 states and 54897 transitions. [2021-12-15 22:48:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:23,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-12-15 22:48:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:23,777 INFO L225 Difference]: With dead ends: 44068 [2021-12-15 22:48:23,778 INFO L226 Difference]: Without dead ends: 25583 [2021-12-15 22:48:23,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:23,798 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 858 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 956 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:48:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25583 states. [2021-12-15 22:48:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25583 to 24786. [2021-12-15 22:48:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.230260238047206) internal successors, (30492), 24785 states have internal predecessors, (30492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30492 transitions. [2021-12-15 22:48:24,049 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30492 transitions. Word has length 226 [2021-12-15 22:48:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:24,049 INFO L470 AbstractCegarLoop]: Abstraction has 24786 states and 30492 transitions. [2021-12-15 22:48:24,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30492 transitions. [2021-12-15 22:48:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 22:48:24,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:24,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:24,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:48:24,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1839244227, now seen corresponding path program 1 times [2021-12-15 22:48:24,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520013802] [2021-12-15 22:48:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:24,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:24,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520013802] [2021-12-15 22:48:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520013802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:24,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:24,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708504155] [2021-12-15 22:48:24,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:48:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:48:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:24,156 INFO L87 Difference]: Start difference. First operand 24786 states and 30492 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:27,607 INFO L93 Difference]: Finished difference Result 49588 states and 61023 transitions. [2021-12-15 22:48:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:48:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 289 [2021-12-15 22:48:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:27,639 INFO L225 Difference]: With dead ends: 49588 [2021-12-15 22:48:27,640 INFO L226 Difference]: Without dead ends: 25591 [2021-12-15 22:48:27,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:27,661 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1450 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 4873 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 4873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:27,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 1036 Invalid, 5409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 4873 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 22:48:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25591 states. [2021-12-15 22:48:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25591 to 25573. [2021-12-15 22:48:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25573 states, 25572 states have (on average 1.2108165180666355) internal successors, (30963), 25572 states have internal predecessors, (30963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25573 states to 25573 states and 30963 transitions. [2021-12-15 22:48:28,035 INFO L78 Accepts]: Start accepts. Automaton has 25573 states and 30963 transitions. Word has length 289 [2021-12-15 22:48:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:28,036 INFO L470 AbstractCegarLoop]: Abstraction has 25573 states and 30963 transitions. [2021-12-15 22:48:28,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25573 states and 30963 transitions. [2021-12-15 22:48:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-15 22:48:28,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:28,040 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:28,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:48:28,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 113626786, now seen corresponding path program 1 times [2021-12-15 22:48:28,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124915620] [2021-12-15 22:48:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:28,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:48:28,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124915620] [2021-12-15 22:48:28,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124915620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:28,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:28,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:28,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687216716] [2021-12-15 22:48:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:28,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:28,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:28,139 INFO L87 Difference]: Start difference. First operand 25573 states and 30963 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:30,972 INFO L93 Difference]: Finished difference Result 56658 states and 69683 transitions. [2021-12-15 22:48:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 315 [2021-12-15 22:48:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:31,015 INFO L225 Difference]: With dead ends: 56658 [2021-12-15 22:48:31,016 INFO L226 Difference]: Without dead ends: 31874 [2021-12-15 22:48:31,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:31,037 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 849 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:31,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1923 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:48:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31874 states. [2021-12-15 22:48:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31874 to 31868. [2021-12-15 22:48:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31868 states, 31867 states have (on average 1.1872783757492076) internal successors, (37835), 31867 states have internal predecessors, (37835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31868 states to 31868 states and 37835 transitions. [2021-12-15 22:48:31,328 INFO L78 Accepts]: Start accepts. Automaton has 31868 states and 37835 transitions. Word has length 315 [2021-12-15 22:48:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:31,328 INFO L470 AbstractCegarLoop]: Abstraction has 31868 states and 37835 transitions. [2021-12-15 22:48:31,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31868 states and 37835 transitions. [2021-12-15 22:48:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-15 22:48:31,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:31,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:31,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:48:31,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1262569867, now seen corresponding path program 1 times [2021-12-15 22:48:31,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:31,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474425480] [2021-12-15 22:48:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:31,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:48:31,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:31,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474425480] [2021-12-15 22:48:31,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474425480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:48:31,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067256608] [2021-12-15 22:48:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:31,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:31,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:31,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:48:31,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:48:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:48:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:48:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-12-15 22:48:32,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:48:32,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067256608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:32,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:48:32,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:48:32,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917237421] [2021-12-15 22:48:32,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:32,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:32,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:32,055 INFO L87 Difference]: Start difference. First operand 31868 states and 37835 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:35,082 INFO L93 Difference]: Finished difference Result 93796 states and 111636 transitions. [2021-12-15 22:48:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 343 [2021-12-15 22:48:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:35,174 INFO L225 Difference]: With dead ends: 93796 [2021-12-15 22:48:35,175 INFO L226 Difference]: Without dead ends: 62717 [2021-12-15 22:48:35,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:35,206 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 1009 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:35,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 1090 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2690 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:48:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62717 states. [2021-12-15 22:48:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62717 to 62699. [2021-12-15 22:48:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62699 states, 62698 states have (on average 1.1504992184758684) internal successors, (72134), 62698 states have internal predecessors, (72134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62699 states to 62699 states and 72134 transitions. [2021-12-15 22:48:35,907 INFO L78 Accepts]: Start accepts. Automaton has 62699 states and 72134 transitions. Word has length 343 [2021-12-15 22:48:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 62699 states and 72134 transitions. [2021-12-15 22:48:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 62699 states and 72134 transitions. [2021-12-15 22:48:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-15 22:48:35,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:35,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:35,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:48:36,130 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,SelfDestructingSolverStorable9 [2021-12-15 22:48:36,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash -152484837, now seen corresponding path program 1 times [2021-12-15 22:48:36,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997091204] [2021-12-15 22:48:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:36,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 221 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 22:48:36,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997091204] [2021-12-15 22:48:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997091204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:48:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836161777] [2021-12-15 22:48:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:36,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:36,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:48:36,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:48:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:48:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:48:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-15 22:48:36,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:48:36,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836161777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:36,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:48:36,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:48:36,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956355712] [2021-12-15 22:48:36,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:36,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:36,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:48:36,896 INFO L87 Difference]: Start difference. First operand 62699 states and 72134 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:39,471 INFO L93 Difference]: Finished difference Result 124606 states and 143472 transitions. [2021-12-15 22:48:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 353 [2021-12-15 22:48:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:39,542 INFO L225 Difference]: With dead ends: 124606 [2021-12-15 22:48:39,543 INFO L226 Difference]: Without dead ends: 62696 [2021-12-15 22:48:39,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:48:39,581 INFO L933 BasicCegarLoop]: 1371 mSDtfsCounter, 1127 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:39,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1453 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:48:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62696 states. [2021-12-15 22:48:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62696 to 62694. [2021-12-15 22:48:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62694 states, 62693 states have (on average 1.1165839886430702) internal successors, (70002), 62693 states have internal predecessors, (70002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62694 states to 62694 states and 70002 transitions. [2021-12-15 22:48:40,290 INFO L78 Accepts]: Start accepts. Automaton has 62694 states and 70002 transitions. Word has length 353 [2021-12-15 22:48:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:40,290 INFO L470 AbstractCegarLoop]: Abstraction has 62694 states and 70002 transitions. [2021-12-15 22:48:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 62694 states and 70002 transitions. [2021-12-15 22:48:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-12-15 22:48:40,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:40,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:40,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:48:40,516 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,SelfDestructingSolverStorable10 [2021-12-15 22:48:40,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash -475281658, now seen corresponding path program 1 times [2021-12-15 22:48:40,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:40,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325791895] [2021-12-15 22:48:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:40,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:48:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325791895] [2021-12-15 22:48:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325791895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:40,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:40,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:40,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694381579] [2021-12-15 22:48:40,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:48:40,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:48:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:40,638 INFO L87 Difference]: Start difference. First operand 62694 states and 70002 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:46,632 INFO L93 Difference]: Finished difference Result 194737 states and 219412 transitions. [2021-12-15 22:48:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:48:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 420 [2021-12-15 22:48:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:46,860 INFO L225 Difference]: With dead ends: 194737 [2021-12-15 22:48:46,861 INFO L226 Difference]: Without dead ends: 132832 [2021-12-15 22:48:46,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:46,890 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1533 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 6180 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 6911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 6180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:46,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 937 Invalid, 6911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 6180 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 22:48:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132832 states. [2021-12-15 22:48:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132832 to 132809. [2021-12-15 22:48:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132809 states, 132808 states have (on average 1.1046397807361001) internal successors, (146705), 132808 states have internal predecessors, (146705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132809 states to 132809 states and 146705 transitions. [2021-12-15 22:48:48,261 INFO L78 Accepts]: Start accepts. Automaton has 132809 states and 146705 transitions. Word has length 420 [2021-12-15 22:48:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:48,263 INFO L470 AbstractCegarLoop]: Abstraction has 132809 states and 146705 transitions. [2021-12-15 22:48:48,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 132809 states and 146705 transitions. [2021-12-15 22:48:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-15 22:48:48,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:48,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:48,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:48:48,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash 66240533, now seen corresponding path program 1 times [2021-12-15 22:48:48,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:48,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025541768] [2021-12-15 22:48:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:48,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:48:48,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025541768] [2021-12-15 22:48:48,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025541768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:48,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:48,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:48,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862914770] [2021-12-15 22:48:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:48,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:48,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:48,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:48,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:48,613 INFO L87 Difference]: Start difference. First operand 132809 states and 146705 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:52,138 INFO L93 Difference]: Finished difference Result 264848 states and 292653 transitions. [2021-12-15 22:48:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 421 [2021-12-15 22:48:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:52,348 INFO L225 Difference]: With dead ends: 264848 [2021-12-15 22:48:52,348 INFO L226 Difference]: Without dead ends: 132828 [2021-12-15 22:48:52,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:52,423 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 799 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 1917 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:48:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132828 states. [2021-12-15 22:48:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132828 to 132797. [2021-12-15 22:48:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132797 states, 132796 states have (on average 1.0754616102894665) internal successors, (142817), 132796 states have internal predecessors, (142817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132797 states to 132797 states and 142817 transitions. [2021-12-15 22:48:54,230 INFO L78 Accepts]: Start accepts. Automaton has 132797 states and 142817 transitions. Word has length 421 [2021-12-15 22:48:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:54,231 INFO L470 AbstractCegarLoop]: Abstraction has 132797 states and 142817 transitions. [2021-12-15 22:48:54,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 132797 states and 142817 transitions. [2021-12-15 22:48:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-15 22:48:54,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:54,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:54,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:48:54,241 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash -582552875, now seen corresponding path program 1 times [2021-12-15 22:48:54,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:54,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022833252] [2021-12-15 22:48:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:54,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 22:48:54,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022833252] [2021-12-15 22:48:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022833252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:54,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:54,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:54,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711118534] [2021-12-15 22:48:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:54,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:48:54,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:48:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:54,501 INFO L87 Difference]: Start difference. First operand 132797 states and 142817 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)