./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 f43d028ba6ad7288ae454484b752e467a139fa9128b5cbd8640720a39b09e4f4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 18:14:47,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 18:14:47,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 18:14:47,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 18:14:47,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 18:14:47,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 18:14:47,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 18:14:47,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 18:14:47,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 18:14:47,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 18:14:47,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 18:14:47,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 18:14:47,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 18:14:47,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 18:14:47,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 18:14:47,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 18:14:47,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 18:14:47,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 18:14:47,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 18:14:47,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 18:14:47,859 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 18:14:47,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 18:14:47,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 18:14:47,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 18:14:47,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 18:14:47,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 18:14:47,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 18:14:47,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 18:14:47,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 18:14:47,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 18:14:47,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 18:14:47,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 18:14:47,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 18:14:47,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 18:14:47,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 18:14:47,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 18:14:47,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 18:14:47,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 18:14:47,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 18:14:47,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 18:14:47,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 18:14:47,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 18:14:47,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 18:14:47,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 18:14:47,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 18:14:47,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 18:14:47,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 18:14:47,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 18:14:47,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 18:14:47,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 18:14:47,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 18:14:47,897 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 18:14:47,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 18:14:47,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 18:14:47,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 18:14:47,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 18:14:47,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 18:14:47,899 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 18:14:47,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 18:14:47,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 18:14:47,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 18:14:47,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 18:14:47,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:14:47,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 18:14:47,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 18:14:47,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 18:14:47,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 18:14:47,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 18:14:47,901 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 18:14:47,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 18:14:47,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 18:14:47,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f43d028ba6ad7288ae454484b752e467a139fa9128b5cbd8640720a39b09e4f4 [2022-07-22 18:14:48,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 18:14:48,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 18:14:48,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 18:14:48,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 18:14:48,139 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 18:14:48,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-22 18:14:48,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1e05f62/05a30a932c8f439fb93321a4756ca1f6/FLAG0e0bb7a03 [2022-07-22 18:14:48,648 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 18:14:48,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-22 18:14:48,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1e05f62/05a30a932c8f439fb93321a4756ca1f6/FLAG0e0bb7a03 [2022-07-22 18:14:49,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1e05f62/05a30a932c8f439fb93321a4756ca1f6 [2022-07-22 18:14:49,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 18:14:49,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 18:14:49,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 18:14:49,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 18:14:49,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 18:14:49,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0f6145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49, skipping insertion in model container [2022-07-22 18:14:49,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 18:14:49,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 18:14:49,317 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/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14043,14056] [2022-07-22 18:14:49,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:14:49,378 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 18:14:49,449 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/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14043,14056] [2022-07-22 18:14:49,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:14:49,495 INFO L208 MainTranslator]: Completed translation [2022-07-22 18:14:49,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49 WrapperNode [2022-07-22 18:14:49,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 18:14:49,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 18:14:49,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 18:14:49,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 18:14:49,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,549 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1155 [2022-07-22 18:14:49,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 18:14:49,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 18:14:49,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 18:14:49,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 18:14:49,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 18:14:49,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 18:14:49,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 18:14:49,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 18:14:49,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (1/1) ... [2022-07-22 18:14:49,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:14:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:14:49,655 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) [2022-07-22 18:14:49,674 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 [2022-07-22 18:14:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 18:14:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 18:14:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 18:14:49,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 18:14:49,814 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 18:14:49,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 18:14:50,524 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 18:14:50,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 18:14:50,533 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 18:14:50,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:14:50 BoogieIcfgContainer [2022-07-22 18:14:50,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 18:14:50,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 18:14:50,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 18:14:50,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 18:14:50,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 06:14:49" (1/3) ... [2022-07-22 18:14:50,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709b8922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:14:50, skipping insertion in model container [2022-07-22 18:14:50,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:14:49" (2/3) ... [2022-07-22 18:14:50,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709b8922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:14:50, skipping insertion in model container [2022-07-22 18:14:50,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:14:50" (3/3) ... [2022-07-22 18:14:50,542 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-22 18:14:50,553 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 18:14:50,553 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 18:14:50,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 18:14:50,598 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@dfe314c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@43c5d357 [2022-07-22 18:14:50,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 18:14:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 301 states, 299 states have (on average 1.7892976588628762) internal successors, (535), 300 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-22 18:14:50,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:50,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:50,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1732515754, now seen corresponding path program 1 times [2022-07-22 18:14:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:50,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317638049] [2022-07-22 18:14:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:50,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317638049] [2022-07-22 18:14:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317638049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:51,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:14:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016733090] [2022-07-22 18:14:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:14:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:14:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:14:51,197 INFO L87 Difference]: Start difference. First operand has 301 states, 299 states have (on average 1.7892976588628762) internal successors, (535), 300 states have internal predecessors, (535), 0 states have call successors, (0), 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 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:51,376 INFO L93 Difference]: Finished difference Result 877 states and 1562 transitions. [2022-07-22 18:14:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:14:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-07-22 18:14:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:51,400 INFO L225 Difference]: With dead ends: 877 [2022-07-22 18:14:51,401 INFO L226 Difference]: Without dead ends: 579 [2022-07-22 18:14:51,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:51,407 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 1101 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:51,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 1414 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-22 18:14:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 577. [2022-07-22 18:14:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.4513888888888888) internal successors, (836), 576 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 836 transitions. [2022-07-22 18:14:51,483 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 836 transitions. Word has length 143 [2022-07-22 18:14:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:51,484 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 836 transitions. [2022-07-22 18:14:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 836 transitions. [2022-07-22 18:14:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 18:14:51,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:51,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 18:14:51,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1916078526, now seen corresponding path program 1 times [2022-07-22 18:14:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644173447] [2022-07-22 18:14:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:51,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644173447] [2022-07-22 18:14:51,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644173447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:51,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:51,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:14:51,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760327429] [2022-07-22 18:14:51,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:14:51,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:14:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:14:51,603 INFO L87 Difference]: Start difference. First operand 577 states and 836 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:51,666 INFO L93 Difference]: Finished difference Result 1693 states and 2446 transitions. [2022-07-22 18:14:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:14:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-22 18:14:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:51,671 INFO L225 Difference]: With dead ends: 1693 [2022-07-22 18:14:51,671 INFO L226 Difference]: Without dead ends: 1144 [2022-07-22 18:14:51,677 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:14:51,678 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 425 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:51,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 929 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-07-22 18:14:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 579. [2022-07-22 18:14:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.4498269896193772) internal successors, (838), 578 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 838 transitions. [2022-07-22 18:14:51,728 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 838 transitions. Word has length 144 [2022-07-22 18:14:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:51,730 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 838 transitions. [2022-07-22 18:14:51,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 838 transitions. [2022-07-22 18:14:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 18:14:51,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:51,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:51,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 18:14:51,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 372219765, now seen corresponding path program 1 times [2022-07-22 18:14:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271265344] [2022-07-22 18:14:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:51,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271265344] [2022-07-22 18:14:51,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271265344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:51,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:51,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:14:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399224239] [2022-07-22 18:14:51,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:14:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:14:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:14:51,923 INFO L87 Difference]: Start difference. First operand 579 states and 838 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:52,044 INFO L93 Difference]: Finished difference Result 1653 states and 2378 transitions. [2022-07-22 18:14:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:14:52,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-07-22 18:14:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:52,049 INFO L225 Difference]: With dead ends: 1653 [2022-07-22 18:14:52,049 INFO L226 Difference]: Without dead ends: 1104 [2022-07-22 18:14:52,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:52,055 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 855 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:52,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1115 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-07-22 18:14:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2022-07-22 18:14:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.4277929155313351) internal successors, (1572), 1101 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1572 transitions. [2022-07-22 18:14:52,154 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1572 transitions. Word has length 145 [2022-07-22 18:14:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:52,155 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1572 transitions. [2022-07-22 18:14:52,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1572 transitions. [2022-07-22 18:14:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 18:14:52,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:52,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 18:14:52,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1286234625, now seen corresponding path program 1 times [2022-07-22 18:14:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105615679] [2022-07-22 18:14:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:52,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105615679] [2022-07-22 18:14:52,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105615679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:52,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:52,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:14:52,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223871757] [2022-07-22 18:14:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:52,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:14:52,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:14:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:14:52,210 INFO L87 Difference]: Start difference. First operand 1102 states and 1572 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:52,326 INFO L93 Difference]: Finished difference Result 3230 states and 4596 transitions. [2022-07-22 18:14:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:14:52,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-07-22 18:14:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:52,333 INFO L225 Difference]: With dead ends: 3230 [2022-07-22 18:14:52,333 INFO L226 Difference]: Without dead ends: 2172 [2022-07-22 18:14:52,334 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:14:52,335 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 411 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:52,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1271 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2022-07-22 18:14:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1106. [2022-07-22 18:14:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.4262443438914028) internal successors, (1576), 1105 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1576 transitions. [2022-07-22 18:14:52,407 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1576 transitions. Word has length 146 [2022-07-22 18:14:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:52,408 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1576 transitions. [2022-07-22 18:14:52,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1576 transitions. [2022-07-22 18:14:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 18:14:52,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:52,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 18:14:52,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1557393051, now seen corresponding path program 1 times [2022-07-22 18:14:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830325816] [2022-07-22 18:14:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830325816] [2022-07-22 18:14:52,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830325816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:52,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:52,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:14:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712419540] [2022-07-22 18:14:52,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:14:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:14:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:14:52,475 INFO L87 Difference]: Start difference. First operand 1106 states and 1576 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:52,623 INFO L93 Difference]: Finished difference Result 2922 states and 4192 transitions. [2022-07-22 18:14:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:14:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-07-22 18:14:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:52,631 INFO L225 Difference]: With dead ends: 2922 [2022-07-22 18:14:52,631 INFO L226 Difference]: Without dead ends: 2120 [2022-07-22 18:14:52,633 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:14:52,634 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 356 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:52,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1196 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2022-07-22 18:14:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2118. [2022-07-22 18:14:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 1.4095418044402457) internal successors, (2984), 2117 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2984 transitions. [2022-07-22 18:14:52,770 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2984 transitions. Word has length 147 [2022-07-22 18:14:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:52,771 INFO L495 AbstractCegarLoop]: Abstraction has 2118 states and 2984 transitions. [2022-07-22 18:14:52,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2984 transitions. [2022-07-22 18:14:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 18:14:52,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:52,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:52,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 18:14:52,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:52,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1661864862, now seen corresponding path program 1 times [2022-07-22 18:14:52,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270277819] [2022-07-22 18:14:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270277819] [2022-07-22 18:14:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270277819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:52,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:14:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414009915] [2022-07-22 18:14:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:14:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:14:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:52,911 INFO L87 Difference]: Start difference. First operand 2118 states and 2984 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:53,233 INFO L93 Difference]: Finished difference Result 5910 states and 8337 transitions. [2022-07-22 18:14:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:14:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-07-22 18:14:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:53,247 INFO L225 Difference]: With dead ends: 5910 [2022-07-22 18:14:53,247 INFO L226 Difference]: Without dead ends: 3829 [2022-07-22 18:14:53,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:53,251 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 902 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:53,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1501 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2022-07-22 18:14:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3827. [2022-07-22 18:14:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 1.3993727130162048) internal successors, (5354), 3826 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5354 transitions. [2022-07-22 18:14:53,550 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5354 transitions. Word has length 147 [2022-07-22 18:14:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:53,550 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 5354 transitions. [2022-07-22 18:14:53,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5354 transitions. [2022-07-22 18:14:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 18:14:53,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:53,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:53,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 18:14:53,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:53,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1862693396, now seen corresponding path program 1 times [2022-07-22 18:14:53,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:53,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433264117] [2022-07-22 18:14:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:53,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:53,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433264117] [2022-07-22 18:14:53,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433264117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:53,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:53,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:14:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642934923] [2022-07-22 18:14:53,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:53,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:14:53,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:14:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:14:53,668 INFO L87 Difference]: Start difference. First operand 3827 states and 5354 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:54,029 INFO L93 Difference]: Finished difference Result 7881 states and 10938 transitions. [2022-07-22 18:14:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:14:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-07-22 18:14:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:54,043 INFO L225 Difference]: With dead ends: 7881 [2022-07-22 18:14:54,044 INFO L226 Difference]: Without dead ends: 4171 [2022-07-22 18:14:54,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:54,051 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 844 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:54,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1099 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-07-22 18:14:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4031. [2022-07-22 18:14:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4031 states, 4030 states have (on average 1.3841191066997518) internal successors, (5578), 4030 states have internal predecessors, (5578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4031 states to 4031 states and 5578 transitions. [2022-07-22 18:14:54,372 INFO L78 Accepts]: Start accepts. Automaton has 4031 states and 5578 transitions. Word has length 147 [2022-07-22 18:14:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:54,373 INFO L495 AbstractCegarLoop]: Abstraction has 4031 states and 5578 transitions. [2022-07-22 18:14:54,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4031 states and 5578 transitions. [2022-07-22 18:14:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 18:14:54,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:54,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 18:14:54,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash -292089536, now seen corresponding path program 1 times [2022-07-22 18:14:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343222044] [2022-07-22 18:14:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343222044] [2022-07-22 18:14:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343222044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:54,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:14:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519299992] [2022-07-22 18:14:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:14:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:14:54,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:14:54,422 INFO L87 Difference]: Start difference. First operand 4031 states and 5578 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:55,038 INFO L93 Difference]: Finished difference Result 11411 states and 15864 transitions. [2022-07-22 18:14:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:14:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-07-22 18:14:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:55,062 INFO L225 Difference]: With dead ends: 11411 [2022-07-22 18:14:55,063 INFO L226 Difference]: Without dead ends: 7937 [2022-07-22 18:14:55,069 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:14:55,069 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 397 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:55,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 940 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7937 states. [2022-07-22 18:14:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7937 to 4047. [2022-07-22 18:14:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 1.3826000988630747) internal successors, (5594), 4046 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5594 transitions. [2022-07-22 18:14:55,401 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5594 transitions. Word has length 148 [2022-07-22 18:14:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:55,401 INFO L495 AbstractCegarLoop]: Abstraction has 4047 states and 5594 transitions. [2022-07-22 18:14:55,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5594 transitions. [2022-07-22 18:14:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-22 18:14:55,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:55,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:55,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 18:14:55,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1315250227, now seen corresponding path program 1 times [2022-07-22 18:14:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940393829] [2022-07-22 18:14:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:55,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:55,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940393829] [2022-07-22 18:14:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940393829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:55,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:55,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:14:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362523930] [2022-07-22 18:14:55,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:14:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:14:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:14:55,498 INFO L87 Difference]: Start difference. First operand 4047 states and 5594 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:55,813 INFO L93 Difference]: Finished difference Result 8084 states and 11174 transitions. [2022-07-22 18:14:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:14:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2022-07-22 18:14:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:55,825 INFO L225 Difference]: With dead ends: 8084 [2022-07-22 18:14:55,826 INFO L226 Difference]: Without dead ends: 4045 [2022-07-22 18:14:55,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:14:55,832 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 65 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1341 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2022-07-22 18:14:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 4045. [2022-07-22 18:14:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4045 states, 4044 states have (on average 1.3822947576656774) internal successors, (5590), 4044 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4045 states to 4045 states and 5590 transitions. [2022-07-22 18:14:56,182 INFO L78 Accepts]: Start accepts. Automaton has 4045 states and 5590 transitions. Word has length 149 [2022-07-22 18:14:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:56,182 INFO L495 AbstractCegarLoop]: Abstraction has 4045 states and 5590 transitions. [2022-07-22 18:14:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4045 states and 5590 transitions. [2022-07-22 18:14:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-22 18:14:56,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:56,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:56,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 18:14:56,188 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash 867432798, now seen corresponding path program 1 times [2022-07-22 18:14:56,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706298020] [2022-07-22 18:14:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706298020] [2022-07-22 18:14:56,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706298020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:56,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:56,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:14:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299784763] [2022-07-22 18:14:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:14:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:14:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:14:56,230 INFO L87 Difference]: Start difference. First operand 4045 states and 5590 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:56,774 INFO L93 Difference]: Finished difference Result 8936 states and 12473 transitions. [2022-07-22 18:14:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:14:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2022-07-22 18:14:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:56,786 INFO L225 Difference]: With dead ends: 8936 [2022-07-22 18:14:56,786 INFO L226 Difference]: Without dead ends: 5990 [2022-07-22 18:14:56,790 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:14:56,791 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 361 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:56,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1168 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:14:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2022-07-22 18:14:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5988. [2022-07-22 18:14:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 5987 states have (on average 1.360113579422081) internal successors, (8143), 5987 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 8143 transitions. [2022-07-22 18:14:57,221 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 8143 transitions. Word has length 149 [2022-07-22 18:14:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:14:57,221 INFO L495 AbstractCegarLoop]: Abstraction has 5988 states and 8143 transitions. [2022-07-22 18:14:57,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 8143 transitions. [2022-07-22 18:14:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 18:14:57,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:14:57,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:14:57,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 18:14:57,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:14:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:14:57,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1284666434, now seen corresponding path program 1 times [2022-07-22 18:14:57,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:14:57,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877517495] [2022-07-22 18:14:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:14:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:14:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:14:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:14:57,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:14:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877517495] [2022-07-22 18:14:57,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877517495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:14:57,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:14:57,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 18:14:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623012126] [2022-07-22 18:14:57,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:14:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 18:14:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:14:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 18:14:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 18:14:57,379 INFO L87 Difference]: Start difference. First operand 5988 states and 8143 transitions. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:14:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:14:59,721 INFO L93 Difference]: Finished difference Result 20575 states and 30158 transitions. [2022-07-22 18:14:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 18:14:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-07-22 18:14:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:14:59,757 INFO L225 Difference]: With dead ends: 20575 [2022-07-22 18:14:59,757 INFO L226 Difference]: Without dead ends: 16628 [2022-07-22 18:14:59,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2022-07-22 18:14:59,768 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 3906 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3906 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 18:14:59,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3906 Valid, 2019 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 18:14:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16628 states. [2022-07-22 18:15:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16628 to 12216. [2022-07-22 18:15:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 1.419811706917724) internal successors, (17343), 12215 states have internal predecessors, (17343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 17343 transitions. [2022-07-22 18:15:01,080 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 17343 transitions. Word has length 152 [2022-07-22 18:15:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 17343 transitions. [2022-07-22 18:15:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 17343 transitions. [2022-07-22 18:15:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 18:15:01,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:01,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:01,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 18:15:01,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1824421472, now seen corresponding path program 1 times [2022-07-22 18:15:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:01,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306995462] [2022-07-22 18:15:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:01,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306995462] [2022-07-22 18:15:01,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306995462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:01,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:01,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:15:01,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029940048] [2022-07-22 18:15:01,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:15:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:15:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:15:01,179 INFO L87 Difference]: Start difference. First operand 12216 states and 17343 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:15:02,517 INFO L93 Difference]: Finished difference Result 20712 states and 30893 transitions. [2022-07-22 18:15:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:15:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-07-22 18:15:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:15:02,548 INFO L225 Difference]: With dead ends: 20712 [2022-07-22 18:15:02,549 INFO L226 Difference]: Without dead ends: 14442 [2022-07-22 18:15:02,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:15:02,561 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 794 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:15:02,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 797 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:15:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14442 states. [2022-07-22 18:15:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14442 to 14440. [2022-07-22 18:15:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14440 states, 14439 states have (on average 1.437980469561604) internal successors, (20763), 14439 states have internal predecessors, (20763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14440 states to 14440 states and 20763 transitions. [2022-07-22 18:15:04,372 INFO L78 Accepts]: Start accepts. Automaton has 14440 states and 20763 transitions. Word has length 152 [2022-07-22 18:15:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:04,373 INFO L495 AbstractCegarLoop]: Abstraction has 14440 states and 20763 transitions. [2022-07-22 18:15:04,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14440 states and 20763 transitions. [2022-07-22 18:15:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 18:15:04,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:04,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 18:15:04,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1841812308, now seen corresponding path program 1 times [2022-07-22 18:15:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:04,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901825274] [2022-07-22 18:15:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901825274] [2022-07-22 18:15:04,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901825274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:04,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:04,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:15:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842101113] [2022-07-22 18:15:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:15:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:15:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:15:04,471 INFO L87 Difference]: Start difference. First operand 14440 states and 20763 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:15:06,904 INFO L93 Difference]: Finished difference Result 37181 states and 53601 transitions. [2022-07-22 18:15:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:15:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-07-22 18:15:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:15:06,964 INFO L225 Difference]: With dead ends: 37181 [2022-07-22 18:15:06,964 INFO L226 Difference]: Without dead ends: 23059 [2022-07-22 18:15:06,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:15:06,983 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 848 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:15:06,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:15:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23059 states. [2022-07-22 18:15:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23059 to 23057. [2022-07-22 18:15:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23057 states, 23056 states have (on average 1.424791811242193) internal successors, (32850), 23056 states have internal predecessors, (32850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23057 states to 23057 states and 32850 transitions. [2022-07-22 18:15:09,512 INFO L78 Accepts]: Start accepts. Automaton has 23057 states and 32850 transitions. Word has length 152 [2022-07-22 18:15:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:09,512 INFO L495 AbstractCegarLoop]: Abstraction has 23057 states and 32850 transitions. [2022-07-22 18:15:09,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 23057 states and 32850 transitions. [2022-07-22 18:15:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-22 18:15:09,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:09,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 18:15:09,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -8512359, now seen corresponding path program 1 times [2022-07-22 18:15:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701878054] [2022-07-22 18:15:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701878054] [2022-07-22 18:15:09,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701878054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:09,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:09,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:15:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539866832] [2022-07-22 18:15:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:15:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:15:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:15:09,608 INFO L87 Difference]: Start difference. First operand 23057 states and 32850 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:15:11,946 INFO L93 Difference]: Finished difference Result 36603 states and 52226 transitions. [2022-07-22 18:15:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:15:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2022-07-22 18:15:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:15:11,983 INFO L225 Difference]: With dead ends: 36603 [2022-07-22 18:15:11,984 INFO L226 Difference]: Without dead ends: 18789 [2022-07-22 18:15:12,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:15:12,012 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 53 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:15:12,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1307 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:15:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18789 states. [2022-07-22 18:15:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18789 to 18789. [2022-07-22 18:15:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18789 states, 18788 states have (on average 1.4182989142005535) internal successors, (26647), 18788 states have internal predecessors, (26647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18789 states to 18789 states and 26647 transitions. [2022-07-22 18:15:14,098 INFO L78 Accepts]: Start accepts. Automaton has 18789 states and 26647 transitions. Word has length 154 [2022-07-22 18:15:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:14,098 INFO L495 AbstractCegarLoop]: Abstraction has 18789 states and 26647 transitions. [2022-07-22 18:15:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18789 states and 26647 transitions. [2022-07-22 18:15:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 18:15:14,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:14,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 18:15:14,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1625804197, now seen corresponding path program 1 times [2022-07-22 18:15:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31412635] [2022-07-22 18:15:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:14,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:14,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31412635] [2022-07-22 18:15:14,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31412635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:14,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:14,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:15:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016554916] [2022-07-22 18:15:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:15:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:15:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:15:14,153 INFO L87 Difference]: Start difference. First operand 18789 states and 26647 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:15:18,203 INFO L93 Difference]: Finished difference Result 49849 states and 71779 transitions. [2022-07-22 18:15:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:15:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-07-22 18:15:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:15:18,274 INFO L225 Difference]: With dead ends: 49849 [2022-07-22 18:15:18,274 INFO L226 Difference]: Without dead ends: 36351 [2022-07-22 18:15:18,296 INFO L412 NwaCegarLoop]: 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 [2022-07-22 18:15:18,296 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 339 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 18:15:18,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 687 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 18:15:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2022-07-22 18:15:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 36349. [2022-07-22 18:15:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36349 states, 36348 states have (on average 1.4172169032684054) internal successors, (51513), 36348 states have internal predecessors, (51513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 51513 transitions. [2022-07-22 18:15:22,569 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 51513 transitions. Word has length 157 [2022-07-22 18:15:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:22,569 INFO L495 AbstractCegarLoop]: Abstraction has 36349 states and 51513 transitions. [2022-07-22 18:15:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 51513 transitions. [2022-07-22 18:15:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 18:15:22,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:22,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 18:15:22,600 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -235404352, now seen corresponding path program 1 times [2022-07-22 18:15:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365777110] [2022-07-22 18:15:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:22,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365777110] [2022-07-22 18:15:22,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365777110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:22,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:22,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 18:15:22,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261033782] [2022-07-22 18:15:22,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:22,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 18:15:22,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 18:15:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 18:15:22,723 INFO L87 Difference]: Start difference. First operand 36349 states and 51513 transitions. Second operand has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:15:43,246 INFO L93 Difference]: Finished difference Result 167897 states and 247432 transitions. [2022-07-22 18:15:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 18:15:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-07-22 18:15:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:15:43,608 INFO L225 Difference]: With dead ends: 167897 [2022-07-22 18:15:43,608 INFO L226 Difference]: Without dead ends: 137037 [2022-07-22 18:15:43,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2022-07-22 18:15:43,676 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 3673 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3673 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 18:15:43,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3673 Valid, 1983 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 18:15:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137037 states. [2022-07-22 18:15:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137037 to 96453. [2022-07-22 18:15:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96453 states, 96452 states have (on average 1.4463256334757184) internal successors, (139501), 96452 states have internal predecessors, (139501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96453 states to 96453 states and 139501 transitions. [2022-07-22 18:15:59,140 INFO L78 Accepts]: Start accepts. Automaton has 96453 states and 139501 transitions. Word has length 157 [2022-07-22 18:15:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:15:59,141 INFO L495 AbstractCegarLoop]: Abstraction has 96453 states and 139501 transitions. [2022-07-22 18:15:59,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:15:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 96453 states and 139501 transitions. [2022-07-22 18:15:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 18:15:59,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:15:59,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:15:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 18:15:59,179 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:15:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:15:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash -408973622, now seen corresponding path program 1 times [2022-07-22 18:15:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:15:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351361870] [2022-07-22 18:15:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:15:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:15:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:15:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:15:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:15:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351361870] [2022-07-22 18:15:59,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351361870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:15:59,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:15:59,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:15:59,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981519647] [2022-07-22 18:15:59,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:15:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:15:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:15:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:15:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:15:59,243 INFO L87 Difference]: Start difference. First operand 96453 states and 139501 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)