./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/systemc/mem_slave_tlm.3.cil.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 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:12:12,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:12:12,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:12:12,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:12:12,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:12:12,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:12:12,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:12:12,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:12:12,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:12:12,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:12:12,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:12:12,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:12:12,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:12:12,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:12:12,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:12:12,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:12:12,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:12:12,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:12:12,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:12:12,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:12:12,848 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:12:12,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:12:12,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:12:12,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:12:12,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:12:12,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:12:12,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:12:12,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:12:12,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:12:12,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:12:12,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:12:12,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:12:12,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:12:12,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:12:12,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:12:12,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:12:12,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:12:12,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:12:12,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:12:12,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:12:12,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:12:12,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:12:12,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:12:12,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:12:12,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:12:12,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:12:12,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:12:12,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:12:12,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:12:12,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:12:12,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:12:12,897 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:12:12,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:12:12,898 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:12:12,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:12:12,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:12:12,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:12:12,899 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:12:12,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:12:12,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:12:12,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:12:12,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:12:12,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:12:12,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:12:12,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:12:12,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:12:12,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:12:12,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:12:12,901 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:12:12,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:12:12,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:12:12,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 [2022-07-21 05:12:13,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:12:13,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:12:13,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:12:13,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:12:13,171 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:12:13,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2022-07-21 05:12:13,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0f4a8c1/fbaf39f5cb0a4e149ce5cdee70473cb8/FLAGd47625873 [2022-07-21 05:12:13,601 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:12:13,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2022-07-21 05:12:13,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0f4a8c1/fbaf39f5cb0a4e149ce5cdee70473cb8/FLAGd47625873 [2022-07-21 05:12:13,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0f4a8c1/fbaf39f5cb0a4e149ce5cdee70473cb8 [2022-07-21 05:12:13,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:12:13,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:12:13,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:12:13,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:12:13,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:12:13,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:13,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3c623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13, skipping insertion in model container [2022-07-21 05:12:13,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:13,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:12:13,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:12:13,778 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/systemc/mem_slave_tlm.3.cil.c[646,659] [2022-07-21 05:12:13,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:12:13,920 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:12:13,927 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/systemc/mem_slave_tlm.3.cil.c[646,659] [2022-07-21 05:12:13,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:12:13,980 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:12:13,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13 WrapperNode [2022-07-21 05:12:13,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:12:13,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:12:13,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:12:13,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:12:13,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,044 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 856 [2022-07-21 05:12:14,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:12:14,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:12:14,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:12:14,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:12:14,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:12:14,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:12:14,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:12:14,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:12:14,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (1/1) ... [2022-07-21 05:12:14,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:12:14,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:14,134 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) [2022-07-21 05:12:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:12:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:12:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-21 05:12:14,167 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-21 05:12:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:12:14,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:12:14,159 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 [2022-07-21 05:12:14,260 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:12:14,262 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:12:14,825 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:12:14,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:12:14,834 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2022-07-21 05:12:14,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:12:14 BoogieIcfgContainer [2022-07-21 05:12:14,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:12:14,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:12:14,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:12:14,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:12:14,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:12:13" (1/3) ... [2022-07-21 05:12:14,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d3c9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:12:14, skipping insertion in model container [2022-07-21 05:12:14,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:13" (2/3) ... [2022-07-21 05:12:14,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d3c9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:12:14, skipping insertion in model container [2022-07-21 05:12:14,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:12:14" (3/3) ... [2022-07-21 05:12:14,842 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2022-07-21 05:12:14,852 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:12:14,852 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:12:14,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:12:14,893 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@bbaa941, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15060a46 [2022-07-21 05:12:14,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:12:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 05:12:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 05:12:14,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:14,905 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] [2022-07-21 05:12:14,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 193087219, now seen corresponding path program 1 times [2022-07-21 05:12:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741197747] [2022-07-21 05:12:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:14,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:15,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741197747] [2022-07-21 05:12:15,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741197747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:15,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:15,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:15,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574738123] [2022-07-21 05:12:15,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:15,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:15,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:15,100 INFO L87 Difference]: Start difference. First operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:15,402 INFO L93 Difference]: Finished difference Result 724 states and 1329 transitions. [2022-07-21 05:12:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-21 05:12:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:15,421 INFO L225 Difference]: With dead ends: 724 [2022-07-21 05:12:15,421 INFO L226 Difference]: Without dead ends: 446 [2022-07-21 05:12:15,426 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 [2022-07-21 05:12:15,429 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 263 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:15,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 781 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-21 05:12:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2022-07-21 05:12:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 427 states have (on average 1.5971896955503513) internal successors, (682), 431 states have internal predecessors, (682), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 687 transitions. [2022-07-21 05:12:15,491 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 687 transitions. Word has length 29 [2022-07-21 05:12:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:15,491 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 687 transitions. [2022-07-21 05:12:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 687 transitions. [2022-07-21 05:12:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 05:12:15,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:15,495 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] [2022-07-21 05:12:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:12:15,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2107562570, now seen corresponding path program 1 times [2022-07-21 05:12:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:15,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973236650] [2022-07-21 05:12:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:15,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973236650] [2022-07-21 05:12:15,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973236650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:15,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:15,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801128675] [2022-07-21 05:12:15,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:15,554 INFO L87 Difference]: Start difference. First operand 433 states and 687 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:15,644 INFO L93 Difference]: Finished difference Result 1137 states and 1829 transitions. [2022-07-21 05:12:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 05:12:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:15,647 INFO L225 Difference]: With dead ends: 1137 [2022-07-21 05:12:15,647 INFO L226 Difference]: Without dead ends: 718 [2022-07-21 05:12:15,648 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 [2022-07-21 05:12:15,649 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 326 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:15,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1024 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-07-21 05:12:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 705. [2022-07-21 05:12:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 699 states have (on average 1.6309012875536482) internal successors, (1140), 703 states have internal predecessors, (1140), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1145 transitions. [2022-07-21 05:12:15,665 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1145 transitions. Word has length 39 [2022-07-21 05:12:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:15,665 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 1145 transitions. [2022-07-21 05:12:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1145 transitions. [2022-07-21 05:12:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 05:12:15,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:15,667 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] [2022-07-21 05:12:15,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:12:15,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 639754325, now seen corresponding path program 1 times [2022-07-21 05:12:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231211657] [2022-07-21 05:12:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231211657] [2022-07-21 05:12:15,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231211657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:15,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:15,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895055729] [2022-07-21 05:12:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:15,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:15,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:15,702 INFO L87 Difference]: Start difference. First operand 705 states and 1145 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:15,745 INFO L93 Difference]: Finished difference Result 1777 states and 2884 transitions. [2022-07-21 05:12:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-21 05:12:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:15,749 INFO L225 Difference]: With dead ends: 1777 [2022-07-21 05:12:15,749 INFO L226 Difference]: Without dead ends: 1097 [2022-07-21 05:12:15,750 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 [2022-07-21 05:12:15,750 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 353 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:15,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 813 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-07-21 05:12:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1086. [2022-07-21 05:12:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1080 states have (on average 1.6203703703703705) internal successors, (1750), 1084 states have internal predecessors, (1750), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1755 transitions. [2022-07-21 05:12:15,771 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1755 transitions. Word has length 40 [2022-07-21 05:12:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:15,771 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 1755 transitions. [2022-07-21 05:12:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1755 transitions. [2022-07-21 05:12:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 05:12:15,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:15,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:15,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:12:15,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:15,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2131746944, now seen corresponding path program 1 times [2022-07-21 05:12:15,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:15,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248267622] [2022-07-21 05:12:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:15,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248267622] [2022-07-21 05:12:15,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248267622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:15,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 05:12:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43877692] [2022-07-21 05:12:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:15,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 05:12:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 05:12:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:12:15,813 INFO L87 Difference]: Start difference. First operand 1086 states and 1755 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:16,059 INFO L93 Difference]: Finished difference Result 2994 states and 4815 transitions. [2022-07-21 05:12:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 05:12:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 05:12:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:16,067 INFO L225 Difference]: With dead ends: 2994 [2022-07-21 05:12:16,067 INFO L226 Difference]: Without dead ends: 1933 [2022-07-21 05:12:16,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:16,074 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 584 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:16,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1566 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-07-21 05:12:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1700. [2022-07-21 05:12:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1694 states have (on average 1.5950413223140496) internal successors, (2702), 1698 states have internal predecessors, (2702), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2707 transitions. [2022-07-21 05:12:16,124 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2707 transitions. Word has length 48 [2022-07-21 05:12:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:16,125 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2707 transitions. [2022-07-21 05:12:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2707 transitions. [2022-07-21 05:12:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 05:12:16,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:16,126 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] [2022-07-21 05:12:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:12:16,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799200, now seen corresponding path program 1 times [2022-07-21 05:12:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732828602] [2022-07-21 05:12:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732828602] [2022-07-21 05:12:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732828602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:16,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:16,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 05:12:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025803531] [2022-07-21 05:12:16,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:16,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 05:12:16,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 05:12:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:12:16,169 INFO L87 Difference]: Start difference. First operand 1700 states and 2707 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:16,452 INFO L93 Difference]: Finished difference Result 5049 states and 7944 transitions. [2022-07-21 05:12:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 05:12:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 05:12:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:16,463 INFO L225 Difference]: With dead ends: 5049 [2022-07-21 05:12:16,463 INFO L226 Difference]: Without dead ends: 3368 [2022-07-21 05:12:16,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:16,466 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 742 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:16,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 1056 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2022-07-21 05:12:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2994. [2022-07-21 05:12:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2988 states have (on average 1.5686077643908969) internal successors, (4687), 2992 states have internal predecessors, (4687), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4692 transitions. [2022-07-21 05:12:16,544 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4692 transitions. Word has length 53 [2022-07-21 05:12:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:16,546 INFO L495 AbstractCegarLoop]: Abstraction has 2994 states and 4692 transitions. [2022-07-21 05:12:16,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4692 transitions. [2022-07-21 05:12:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 05:12:16,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:16,548 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] [2022-07-21 05:12:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:12:16,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:16,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984937, now seen corresponding path program 1 times [2022-07-21 05:12:16,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:16,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374223378] [2022-07-21 05:12:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:16,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:16,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374223378] [2022-07-21 05:12:16,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374223378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:16,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:16,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:16,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359446671] [2022-07-21 05:12:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:16,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:16,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:16,581 INFO L87 Difference]: Start difference. First operand 2994 states and 4692 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:16,709 INFO L93 Difference]: Finished difference Result 7033 states and 10981 transitions. [2022-07-21 05:12:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 05:12:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:16,721 INFO L225 Difference]: With dead ends: 7033 [2022-07-21 05:12:16,721 INFO L226 Difference]: Without dead ends: 4062 [2022-07-21 05:12:16,724 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 [2022-07-21 05:12:16,724 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 368 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 712 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2022-07-21 05:12:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 3878. [2022-07-21 05:12:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3872 states have (on average 1.5488119834710743) internal successors, (5997), 3876 states have internal predecessors, (5997), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 6002 transitions. [2022-07-21 05:12:16,835 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 6002 transitions. Word has length 53 [2022-07-21 05:12:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:16,835 INFO L495 AbstractCegarLoop]: Abstraction has 3878 states and 6002 transitions. [2022-07-21 05:12:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 6002 transitions. [2022-07-21 05:12:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 05:12:16,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:16,837 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] [2022-07-21 05:12:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:12:16,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash -225924857, now seen corresponding path program 1 times [2022-07-21 05:12:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459963237] [2022-07-21 05:12:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:16,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459963237] [2022-07-21 05:12:16,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459963237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:16,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:16,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678062590] [2022-07-21 05:12:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:16,865 INFO L87 Difference]: Start difference. First operand 3878 states and 6002 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:17,146 INFO L93 Difference]: Finished difference Result 9322 states and 14548 transitions. [2022-07-21 05:12:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-21 05:12:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:17,162 INFO L225 Difference]: With dead ends: 9322 [2022-07-21 05:12:17,162 INFO L226 Difference]: Without dead ends: 5467 [2022-07-21 05:12:17,166 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 [2022-07-21 05:12:17,167 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 250 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:17,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 881 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2022-07-21 05:12:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 4698. [2022-07-21 05:12:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4692 states have (on average 1.4919011082693947) internal successors, (7000), 4696 states have internal predecessors, (7000), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7005 transitions. [2022-07-21 05:12:17,307 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7005 transitions. Word has length 60 [2022-07-21 05:12:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:17,308 INFO L495 AbstractCegarLoop]: Abstraction has 4698 states and 7005 transitions. [2022-07-21 05:12:17,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7005 transitions. [2022-07-21 05:12:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 05:12:17,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:17,310 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] [2022-07-21 05:12:17,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:12:17,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -188990245, now seen corresponding path program 1 times [2022-07-21 05:12:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412084461] [2022-07-21 05:12:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:17,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412084461] [2022-07-21 05:12:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412084461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:17,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:17,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799572371] [2022-07-21 05:12:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:17,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:17,375 INFO L87 Difference]: Start difference. First operand 4698 states and 7005 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:17,527 INFO L93 Difference]: Finished difference Result 9239 states and 13787 transitions. [2022-07-21 05:12:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 05:12:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:17,540 INFO L225 Difference]: With dead ends: 9239 [2022-07-21 05:12:17,540 INFO L226 Difference]: Without dead ends: 4564 [2022-07-21 05:12:17,545 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 [2022-07-21 05:12:17,545 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 345 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:17,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 443 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-07-21 05:12:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 4564. [2022-07-21 05:12:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4558 states have (on average 1.4697235629662133) internal successors, (6699), 4562 states have internal predecessors, (6699), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 6704 transitions. [2022-07-21 05:12:17,638 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 6704 transitions. Word has length 62 [2022-07-21 05:12:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:17,639 INFO L495 AbstractCegarLoop]: Abstraction has 4564 states and 6704 transitions. [2022-07-21 05:12:17,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 6704 transitions. [2022-07-21 05:12:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 05:12:17,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:17,641 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] [2022-07-21 05:12:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 05:12:17,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1119920945, now seen corresponding path program 1 times [2022-07-21 05:12:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:17,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30621235] [2022-07-21 05:12:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:17,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30621235] [2022-07-21 05:12:17,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30621235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:17,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731726189] [2022-07-21 05:12:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:17,660 INFO L87 Difference]: Start difference. First operand 4564 states and 6704 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:17,785 INFO L93 Difference]: Finished difference Result 9772 states and 14526 transitions. [2022-07-21 05:12:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-21 05:12:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:17,801 INFO L225 Difference]: With dead ends: 9772 [2022-07-21 05:12:17,801 INFO L226 Difference]: Without dead ends: 5231 [2022-07-21 05:12:17,807 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 [2022-07-21 05:12:17,808 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 309 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:17,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1002 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2022-07-21 05:12:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 3514. [2022-07-21 05:12:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3508 states have (on average 1.4871721778791334) internal successors, (5217), 3512 states have internal predecessors, (5217), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5222 transitions. [2022-07-21 05:12:17,896 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5222 transitions. Word has length 63 [2022-07-21 05:12:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 3514 states and 5222 transitions. [2022-07-21 05:12:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5222 transitions. [2022-07-21 05:12:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 05:12:17,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:17,897 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] [2022-07-21 05:12:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 05:12:17,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1680343550, now seen corresponding path program 1 times [2022-07-21 05:12:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143488286] [2022-07-21 05:12:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:17,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143488286] [2022-07-21 05:12:17,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143488286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:17,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:17,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:12:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504748353] [2022-07-21 05:12:17,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:12:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:12:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:17,946 INFO L87 Difference]: Start difference. First operand 3514 states and 5222 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:18,599 INFO L93 Difference]: Finished difference Result 16672 states and 24585 transitions. [2022-07-21 05:12:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:12:18,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-21 05:12:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:18,627 INFO L225 Difference]: With dead ends: 16672 [2022-07-21 05:12:18,627 INFO L226 Difference]: Without dead ends: 13383 [2022-07-21 05:12:18,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:12:18,640 INFO L413 NwaCegarLoop]: 1070 mSDtfsCounter, 2113 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:18,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2113 Valid, 4025 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:12:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13383 states. [2022-07-21 05:12:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13383 to 4384. [2022-07-21 05:12:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4378 states have (on average 1.479899497487437) internal successors, (6479), 4382 states have internal predecessors, (6479), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6484 transitions. [2022-07-21 05:12:18,887 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6484 transitions. Word has length 65 [2022-07-21 05:12:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:18,887 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 6484 transitions. [2022-07-21 05:12:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6484 transitions. [2022-07-21 05:12:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:12:18,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:18,889 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] [2022-07-21 05:12:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 05:12:18,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:18,890 INFO L85 PathProgramCache]: Analyzing trace with hash -807318558, now seen corresponding path program 1 times [2022-07-21 05:12:18,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:18,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806142202] [2022-07-21 05:12:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:18,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806142202] [2022-07-21 05:12:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806142202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:18,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:18,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:12:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353399305] [2022-07-21 05:12:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:12:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:12:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:12:18,928 INFO L87 Difference]: Start difference. First operand 4384 states and 6484 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:19,965 INFO L93 Difference]: Finished difference Result 30283 states and 44507 transitions. [2022-07-21 05:12:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 05:12:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-21 05:12:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:20,024 INFO L225 Difference]: With dead ends: 30283 [2022-07-21 05:12:20,024 INFO L226 Difference]: Without dead ends: 26124 [2022-07-21 05:12:20,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-07-21 05:12:20,037 INFO L413 NwaCegarLoop]: 1877 mSDtfsCounter, 3813 mSDsluCounter, 6758 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 8635 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:20,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3813 Valid, 8635 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26124 states. [2022-07-21 05:12:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26124 to 4694. [2022-07-21 05:12:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4688 states have (on average 1.4699232081911262) internal successors, (6891), 4692 states have internal predecessors, (6891), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6896 transitions. [2022-07-21 05:12:20,346 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6896 transitions. Word has length 66 [2022-07-21 05:12:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 4694 states and 6896 transitions. [2022-07-21 05:12:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6896 transitions. [2022-07-21 05:12:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:12:20,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:20,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:20,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 05:12:20,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash 365229683, now seen corresponding path program 1 times [2022-07-21 05:12:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615542146] [2022-07-21 05:12:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:20,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615542146] [2022-07-21 05:12:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615542146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:20,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:20,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755019796] [2022-07-21 05:12:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:20,365 INFO L87 Difference]: Start difference. First operand 4694 states and 6896 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:20,635 INFO L93 Difference]: Finished difference Result 9887 states and 14496 transitions. [2022-07-21 05:12:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 05:12:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:20,643 INFO L225 Difference]: With dead ends: 9887 [2022-07-21 05:12:20,643 INFO L226 Difference]: Without dead ends: 5214 [2022-07-21 05:12:20,650 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 [2022-07-21 05:12:20,651 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 135 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:20,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 818 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2022-07-21 05:12:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5140. [2022-07-21 05:12:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 5134 states have (on average 1.4649396182313985) internal successors, (7521), 5138 states have internal predecessors, (7521), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7526 transitions. [2022-07-21 05:12:20,902 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7526 transitions. Word has length 79 [2022-07-21 05:12:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:20,903 INFO L495 AbstractCegarLoop]: Abstraction has 5140 states and 7526 transitions. [2022-07-21 05:12:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7526 transitions. [2022-07-21 05:12:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 05:12:20,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:20,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:20,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:12:20,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1737999967, now seen corresponding path program 1 times [2022-07-21 05:12:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673344355] [2022-07-21 05:12:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:20,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:20,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673344355] [2022-07-21 05:12:20,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673344355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:20,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:20,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 05:12:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554465268] [2022-07-21 05:12:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 05:12:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 05:12:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:12:20,964 INFO L87 Difference]: Start difference. First operand 5140 states and 7526 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:21,541 INFO L93 Difference]: Finished difference Result 13742 states and 19960 transitions. [2022-07-21 05:12:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:12:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-21 05:12:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:21,554 INFO L225 Difference]: With dead ends: 13742 [2022-07-21 05:12:21,554 INFO L226 Difference]: Without dead ends: 8501 [2022-07-21 05:12:21,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:21,562 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 650 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:21,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1264 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2022-07-21 05:12:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 7603. [2022-07-21 05:12:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 7597 states have (on average 1.4359615637751744) internal successors, (10909), 7601 states have internal predecessors, (10909), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 10914 transitions. [2022-07-21 05:12:21,863 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 10914 transitions. Word has length 91 [2022-07-21 05:12:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:21,863 INFO L495 AbstractCegarLoop]: Abstraction has 7603 states and 10914 transitions. [2022-07-21 05:12:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 10914 transitions. [2022-07-21 05:12:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 05:12:21,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:21,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:21,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 05:12:21,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1393219568, now seen corresponding path program 1 times [2022-07-21 05:12:21,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:21,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753615918] [2022-07-21 05:12:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:21,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753615918] [2022-07-21 05:12:21,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753615918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:21,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:21,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664944361] [2022-07-21 05:12:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:21,887 INFO L87 Difference]: Start difference. First operand 7603 states and 10914 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:22,052 INFO L93 Difference]: Finished difference Result 10973 states and 15786 transitions. [2022-07-21 05:12:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-21 05:12:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:22,058 INFO L225 Difference]: With dead ends: 10973 [2022-07-21 05:12:22,058 INFO L226 Difference]: Without dead ends: 3373 [2022-07-21 05:12:22,065 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 [2022-07-21 05:12:22,066 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 339 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:22,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 521 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2022-07-21 05:12:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3320. [2022-07-21 05:12:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3314 states have (on average 1.347616173808087) internal successors, (4466), 3318 states have internal predecessors, (4466), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4471 transitions. [2022-07-21 05:12:22,265 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4471 transitions. Word has length 99 [2022-07-21 05:12:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:22,266 INFO L495 AbstractCegarLoop]: Abstraction has 3320 states and 4471 transitions. [2022-07-21 05:12:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4471 transitions. [2022-07-21 05:12:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 05:12:22,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:22,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:22,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 05:12:22,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 759271656, now seen corresponding path program 1 times [2022-07-21 05:12:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:22,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083688775] [2022-07-21 05:12:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083688775] [2022-07-21 05:12:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083688775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:22,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:22,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:12:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82155833] [2022-07-21 05:12:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:22,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:12:22,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:12:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:22,295 INFO L87 Difference]: Start difference. First operand 3320 states and 4471 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:22,708 INFO L93 Difference]: Finished difference Result 12700 states and 17100 transitions. [2022-07-21 05:12:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:12:22,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-21 05:12:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:22,718 INFO L225 Difference]: With dead ends: 12700 [2022-07-21 05:12:22,718 INFO L226 Difference]: Without dead ends: 9557 [2022-07-21 05:12:22,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:12:22,723 INFO L413 NwaCegarLoop]: 1078 mSDtfsCounter, 1536 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 3386 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:22,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 3386 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2022-07-21 05:12:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 3322. [2022-07-21 05:12:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3316 states have (on average 1.3455971049457178) internal successors, (4462), 3320 states have internal predecessors, (4462), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4467 transitions. [2022-07-21 05:12:22,944 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4467 transitions. Word has length 101 [2022-07-21 05:12:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:22,944 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 4467 transitions. [2022-07-21 05:12:22,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4467 transitions. [2022-07-21 05:12:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 05:12:22,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:22,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:22,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 05:12:22,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1438592349, now seen corresponding path program 1 times [2022-07-21 05:12:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:22,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72172206] [2022-07-21 05:12:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72172206] [2022-07-21 05:12:22,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72172206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:22,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686408184] [2022-07-21 05:12:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:22,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:22,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:23,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:23,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:12:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:12:23,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:23,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:12:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686408184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:23,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:12:23,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 05:12:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246106778] [2022-07-21 05:12:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:23,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:23,242 INFO L87 Difference]: Start difference. First operand 3322 states and 4467 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:23,521 INFO L93 Difference]: Finished difference Result 3961 states and 5320 transitions. [2022-07-21 05:12:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-07-21 05:12:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:23,527 INFO L225 Difference]: With dead ends: 3961 [2022-07-21 05:12:23,527 INFO L226 Difference]: Without dead ends: 3957 [2022-07-21 05:12:23,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:23,529 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 233 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:23,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 803 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-07-21 05:12:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3907. [2022-07-21 05:12:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3901 states have (on average 1.3424762881312484) internal successors, (5237), 3905 states have internal predecessors, (5237), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5242 transitions. [2022-07-21 05:12:23,733 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5242 transitions. Word has length 103 [2022-07-21 05:12:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 3907 states and 5242 transitions. [2022-07-21 05:12:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5242 transitions. [2022-07-21 05:12:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-21 05:12:23,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:23,736 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:23,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:23,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 05:12:23,942 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 778344586, now seen corresponding path program 1 times [2022-07-21 05:12:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149858734] [2022-07-21 05:12:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:12:23,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149858734] [2022-07-21 05:12:23,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149858734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380522669] [2022-07-21 05:12:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:23,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:23,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:12:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:12:24,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:24,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:12:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380522669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:24,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:12:24,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 05:12:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222033158] [2022-07-21 05:12:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:24,175 INFO L87 Difference]: Start difference. First operand 3907 states and 5242 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:24,342 INFO L93 Difference]: Finished difference Result 6958 states and 9384 transitions. [2022-07-21 05:12:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-07-21 05:12:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:24,346 INFO L225 Difference]: With dead ends: 6958 [2022-07-21 05:12:24,346 INFO L226 Difference]: Without dead ends: 3056 [2022-07-21 05:12:24,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:24,351 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 264 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:24,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 422 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-07-21 05:12:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2834. [2022-07-21 05:12:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.322135785007072) internal successors, (3739), 2832 states have internal predecessors, (3739), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3744 transitions. [2022-07-21 05:12:24,557 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3744 transitions. Word has length 158 [2022-07-21 05:12:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:24,558 INFO L495 AbstractCegarLoop]: Abstraction has 2834 states and 3744 transitions. [2022-07-21 05:12:24,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3744 transitions. [2022-07-21 05:12:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-21 05:12:24,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:24,560 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:24,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 05:12:24,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1723152090, now seen corresponding path program 1 times [2022-07-21 05:12:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82278814] [2022-07-21 05:12:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:24,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82278814] [2022-07-21 05:12:24,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82278814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916947834] [2022-07-21 05:12:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:24,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:24,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:24,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:12:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:12:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 05:12:24,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:12:24,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916947834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:24,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:12:24,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 05:12:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350933294] [2022-07-21 05:12:24,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:24,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:24,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:24,956 INFO L87 Difference]: Start difference. First operand 2834 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:25,198 INFO L93 Difference]: Finished difference Result 5496 states and 7301 transitions. [2022-07-21 05:12:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-07-21 05:12:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:25,202 INFO L225 Difference]: With dead ends: 5496 [2022-07-21 05:12:25,202 INFO L226 Difference]: Without dead ends: 2834 [2022-07-21 05:12:25,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:25,205 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:25,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 394 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-07-21 05:12:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2834. [2022-07-21 05:12:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.2881895332390383) internal successors, (3643), 2832 states have internal predecessors, (3643), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3648 transitions. [2022-07-21 05:12:25,425 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3648 transitions. Word has length 161 [2022-07-21 05:12:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:25,426 INFO L495 AbstractCegarLoop]: Abstraction has 2834 states and 3648 transitions. [2022-07-21 05:12:25,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3648 transitions. [2022-07-21 05:12:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-21 05:12:25,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:25,428 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:25,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 05:12:25,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 901617889, now seen corresponding path program 1 times [2022-07-21 05:12:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:25,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915592718] [2022-07-21 05:12:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915592718] [2022-07-21 05:12:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915592718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187001988] [2022-07-21 05:12:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:25,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:25,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:12:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:12:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 05:12:25,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:12:25,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187001988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:25,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:12:25,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 05:12:25,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690048518] [2022-07-21 05:12:25,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:25,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:25,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:25,802 INFO L87 Difference]: Start difference. First operand 2834 states and 3648 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:26,304 INFO L93 Difference]: Finished difference Result 6407 states and 8410 transitions. [2022-07-21 05:12:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-07-21 05:12:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:26,308 INFO L225 Difference]: With dead ends: 6407 [2022-07-21 05:12:26,308 INFO L226 Difference]: Without dead ends: 3745 [2022-07-21 05:12:26,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:12:26,312 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 205 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:26,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 664 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-07-21 05:12:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3657. [2022-07-21 05:12:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3651 states have (on average 1.256368118323747) internal successors, (4587), 3655 states have internal predecessors, (4587), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 4592 transitions. [2022-07-21 05:12:26,567 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 4592 transitions. Word has length 162 [2022-07-21 05:12:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:26,568 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 4592 transitions. [2022-07-21 05:12:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 4592 transitions. [2022-07-21 05:12:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-21 05:12:26,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:26,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:26,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:26,783 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash -89319700, now seen corresponding path program 1 times [2022-07-21 05:12:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793108174] [2022-07-21 05:12:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:26,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793108174] [2022-07-21 05:12:26,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793108174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:26,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253618715] [2022-07-21 05:12:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:26,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:26,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:26,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:12:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 05:12:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:27,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:12:27,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253618715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:27,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:27,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-07-21 05:12:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269479840] [2022-07-21 05:12:27,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:27,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 05:12:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 05:12:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:12:27,392 INFO L87 Difference]: Start difference. First operand 3657 states and 4592 transitions. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:28,823 INFO L93 Difference]: Finished difference Result 18372 states and 23167 transitions. [2022-07-21 05:12:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 05:12:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-21 05:12:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:28,840 INFO L225 Difference]: With dead ends: 18372 [2022-07-21 05:12:28,840 INFO L226 Difference]: Without dead ends: 14887 [2022-07-21 05:12:28,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 337 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 05:12:28,847 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 4105 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4105 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:28,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4105 Valid, 5617 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14887 states. [2022-07-21 05:12:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14887 to 5182. [2022-07-21 05:12:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5176 states have (on average 1.2612055641421946) internal successors, (6528), 5180 states have internal predecessors, (6528), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 6533 transitions. [2022-07-21 05:12:29,214 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 6533 transitions. Word has length 164 [2022-07-21 05:12:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:29,214 INFO L495 AbstractCegarLoop]: Abstraction has 5182 states and 6533 transitions. [2022-07-21 05:12:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 6533 transitions. [2022-07-21 05:12:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-21 05:12:29,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:29,217 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:29,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 05:12:29,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:29,431 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1160504422, now seen corresponding path program 1 times [2022-07-21 05:12:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:29,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840750960] [2022-07-21 05:12:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:12:29,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:29,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840750960] [2022-07-21 05:12:29,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840750960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:29,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227607273] [2022-07-21 05:12:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:29,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:29,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:29,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:12:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 05:12:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:12:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:12:30,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227607273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:30,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:30,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-07-21 05:12:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190729653] [2022-07-21 05:12:30,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:30,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:12:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:12:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:12:30,530 INFO L87 Difference]: Start difference. First operand 5182 states and 6533 transitions. Second operand has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:32,567 INFO L93 Difference]: Finished difference Result 23920 states and 30076 transitions. [2022-07-21 05:12:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 05:12:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-07-21 05:12:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:32,588 INFO L225 Difference]: With dead ends: 23920 [2022-07-21 05:12:32,588 INFO L226 Difference]: Without dead ends: 18910 [2022-07-21 05:12:32,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 541 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 05:12:32,596 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 5735 mSDsluCounter, 10170 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 11636 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:32,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5735 Valid, 11636 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:12:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18910 states. [2022-07-21 05:12:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18910 to 6581. [2022-07-21 05:12:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6575 states have (on average 1.2622053231939163) internal successors, (8299), 6579 states have internal predecessors, (8299), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8304 transitions. [2022-07-21 05:12:33,114 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8304 transitions. Word has length 264 [2022-07-21 05:12:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 6581 states and 8304 transitions. [2022-07-21 05:12:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8304 transitions. [2022-07-21 05:12:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-07-21 05:12:33,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:33,119 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:33,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:33,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:33,331 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1649884656, now seen corresponding path program 1 times [2022-07-21 05:12:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419650375] [2022-07-21 05:12:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 268 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:12:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419650375] [2022-07-21 05:12:33,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419650375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223241485] [2022-07-21 05:12:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:33,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:12:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 05:12:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:12:33,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:12:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223241485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:33,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:12:33,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 11 [2022-07-21 05:12:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526945284] [2022-07-21 05:12:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:33,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 05:12:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 05:12:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:12:33,891 INFO L87 Difference]: Start difference. First operand 6581 states and 8304 transitions. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:34,750 INFO L93 Difference]: Finished difference Result 14921 states and 18796 transitions. [2022-07-21 05:12:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:12:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 365 [2022-07-21 05:12:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:34,760 INFO L225 Difference]: With dead ends: 14921 [2022-07-21 05:12:34,761 INFO L226 Difference]: Without dead ends: 8509 [2022-07-21 05:12:34,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-21 05:12:34,768 INFO L413 NwaCegarLoop]: 1266 mSDtfsCounter, 2073 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:34,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 4071 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8509 states. [2022-07-21 05:12:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8509 to 6450. [2022-07-21 05:12:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6444 states have (on average 1.260552451893234) internal successors, (8123), 6448 states have internal predecessors, (8123), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 8128 transitions. [2022-07-21 05:12:35,252 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 8128 transitions. Word has length 365 [2022-07-21 05:12:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:35,253 INFO L495 AbstractCegarLoop]: Abstraction has 6450 states and 8128 transitions. [2022-07-21 05:12:35,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 8128 transitions. [2022-07-21 05:12:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-07-21 05:12:35,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:35,255 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:35,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:35,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 212538691, now seen corresponding path program 1 times [2022-07-21 05:12:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068734785] [2022-07-21 05:12:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-07-21 05:12:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068734785] [2022-07-21 05:12:35,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068734785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:35,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:35,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:12:35,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410287111] [2022-07-21 05:12:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:35,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:12:35,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:12:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:12:35,529 INFO L87 Difference]: Start difference. First operand 6450 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:35,749 INFO L93 Difference]: Finished difference Result 7707 states and 9551 transitions. [2022-07-21 05:12:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:12:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-07-21 05:12:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:35,750 INFO L225 Difference]: With dead ends: 7707 [2022-07-21 05:12:35,751 INFO L226 Difference]: Without dead ends: 1310 [2022-07-21 05:12:35,755 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 [2022-07-21 05:12:35,755 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 134 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:35,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 396 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-07-21 05:12:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1307. [2022-07-21 05:12:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1303 states have (on average 1.091327705295472) internal successors, (1422), 1305 states have internal predecessors, (1422), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1425 transitions. [2022-07-21 05:12:35,871 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1425 transitions. Word has length 366 [2022-07-21 05:12:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:35,871 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 1425 transitions. [2022-07-21 05:12:35,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1425 transitions. [2022-07-21 05:12:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-07-21 05:12:35,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:35,873 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:35,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 05:12:35,874 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1278053055, now seen corresponding path program 1 times [2022-07-21 05:12:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:35,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128845226] [2022-07-21 05:12:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:35,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-07-21 05:12:35,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:35,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128845226] [2022-07-21 05:12:35,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128845226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:35,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:35,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:12:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422385046] [2022-07-21 05:12:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:35,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:12:35,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:35,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:12:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:12:35,943 INFO L87 Difference]: Start difference. First operand 1307 states and 1425 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:36,260 INFO L93 Difference]: Finished difference Result 2682 states and 2939 transitions. [2022-07-21 05:12:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:12:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 367 [2022-07-21 05:12:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:36,264 INFO L225 Difference]: With dead ends: 2682 [2022-07-21 05:12:36,264 INFO L226 Difference]: Without dead ends: 2177 [2022-07-21 05:12:36,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:12:36,266 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 906 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:36,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 2474 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-07-21 05:12:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1303. [2022-07-21 05:12:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1299 states have (on average 1.0869899923017705) internal successors, (1412), 1301 states have internal predecessors, (1412), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1415 transitions. [2022-07-21 05:12:36,384 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1415 transitions. Word has length 367 [2022-07-21 05:12:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:36,384 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 1415 transitions. [2022-07-21 05:12:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1415 transitions. [2022-07-21 05:12:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-07-21 05:12:36,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:36,386 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:36,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 05:12:36,387 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash -393422015, now seen corresponding path program 1 times [2022-07-21 05:12:36,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:36,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068100484] [2022-07-21 05:12:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-07-21 05:12:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068100484] [2022-07-21 05:12:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068100484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:36,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:36,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:12:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867588591] [2022-07-21 05:12:36,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:12:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:12:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:36,435 INFO L87 Difference]: Start difference. First operand 1303 states and 1415 transitions. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:36,606 INFO L93 Difference]: Finished difference Result 2148 states and 2344 transitions. [2022-07-21 05:12:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:12:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2022-07-21 05:12:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:36,608 INFO L225 Difference]: With dead ends: 2148 [2022-07-21 05:12:36,608 INFO L226 Difference]: Without dead ends: 1641 [2022-07-21 05:12:36,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:12:36,609 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 438 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:36,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 925 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:12:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-07-21 05:12:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1272. [2022-07-21 05:12:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0654058313632782) internal successors, (1352), 1270 states have internal predecessors, (1352), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1354 transitions. [2022-07-21 05:12:36,723 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1354 transitions. Word has length 368 [2022-07-21 05:12:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:36,724 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1354 transitions. [2022-07-21 05:12:36,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1354 transitions. [2022-07-21 05:12:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-07-21 05:12:36,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:36,726 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 05:12:36,726 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1783235049, now seen corresponding path program 1 times [2022-07-21 05:12:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33864020] [2022-07-21 05:12:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 229 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-21 05:12:37,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33864020] [2022-07-21 05:12:37,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33864020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068311971] [2022-07-21 05:12:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:37,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:37,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 05:12:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 05:12:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 68 proven. 193 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-21 05:12:37,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 20 proven. 241 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-21 05:12:38,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068311971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:38,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:38,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2022-07-21 05:12:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833184527] [2022-07-21 05:12:38,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 05:12:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 05:12:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-07-21 05:12:38,302 INFO L87 Difference]: Start difference. First operand 1272 states and 1354 transitions. Second operand has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:39,053 INFO L93 Difference]: Finished difference Result 1594 states and 1700 transitions. [2022-07-21 05:12:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 05:12:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 426 [2022-07-21 05:12:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:39,055 INFO L225 Difference]: With dead ends: 1594 [2022-07-21 05:12:39,055 INFO L226 Difference]: Without dead ends: 1591 [2022-07-21 05:12:39,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 845 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 05:12:39,057 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 2563 mSDsluCounter, 6928 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:39,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2563 Valid, 7321 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-07-21 05:12:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1272. [2022-07-21 05:12:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0646178092986605) internal successors, (1351), 1270 states have internal predecessors, (1351), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1353 transitions. [2022-07-21 05:12:39,180 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1353 transitions. Word has length 426 [2022-07-21 05:12:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:39,181 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1353 transitions. [2022-07-21 05:12:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1353 transitions. [2022-07-21 05:12:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-07-21 05:12:39,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:39,183 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 05:12:39,394 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash 147062529, now seen corresponding path program 1 times [2022-07-21 05:12:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207568211] [2022-07-21 05:12:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-07-21 05:12:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207568211] [2022-07-21 05:12:39,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207568211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811943942] [2022-07-21 05:12:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:39,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:39,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 05:12:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 05:12:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-07-21 05:12:39,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-07-21 05:12:40,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811943942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:40,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-07-21 05:12:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532764964] [2022-07-21 05:12:40,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 05:12:40,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 05:12:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:12:40,072 INFO L87 Difference]: Start difference. First operand 1272 states and 1353 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:40,422 INFO L93 Difference]: Finished difference Result 1915 states and 2040 transitions. [2022-07-21 05:12:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:12:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2022-07-21 05:12:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:40,424 INFO L225 Difference]: With dead ends: 1915 [2022-07-21 05:12:40,424 INFO L226 Difference]: Without dead ends: 1621 [2022-07-21 05:12:40,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 951 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:12:40,425 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1121 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:40,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 3355 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-07-21 05:12:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1270. [2022-07-21 05:12:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.0599842146803473) internal successors, (1343), 1268 states have internal predecessors, (1343), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1345 transitions. [2022-07-21 05:12:40,563 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1345 transitions. Word has length 474 [2022-07-21 05:12:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:40,563 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1345 transitions. [2022-07-21 05:12:40,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1345 transitions. [2022-07-21 05:12:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-07-21 05:12:40,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:40,566 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:40,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:40,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 05:12:40,784 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1610767197, now seen corresponding path program 1 times [2022-07-21 05:12:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:40,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339640863] [2022-07-21 05:12:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 126 proven. 575 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 05:12:41,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339640863] [2022-07-21 05:12:41,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339640863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645490067] [2022-07-21 05:12:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:41,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:41,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:41,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 05:12:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 05:12:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 167 proven. 516 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-21 05:12:42,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 25 proven. 658 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-21 05:12:42,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645490067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:42,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:42,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2022-07-21 05:12:42,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123311601] [2022-07-21 05:12:42,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 05:12:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 05:12:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 05:12:42,653 INFO L87 Difference]: Start difference. First operand 1270 states and 1345 transitions. Second operand has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:43,600 INFO L93 Difference]: Finished difference Result 1523 states and 1615 transitions. [2022-07-21 05:12:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 05:12:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 534 [2022-07-21 05:12:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:43,602 INFO L225 Difference]: With dead ends: 1523 [2022-07-21 05:12:43,602 INFO L226 Difference]: Without dead ends: 1520 [2022-07-21 05:12:43,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1065 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 05:12:43,603 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 2787 mSDsluCounter, 13408 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 14040 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:43,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2787 Valid, 14040 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:12:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-07-21 05:12:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1270. [2022-07-21 05:12:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.059194948697711) internal successors, (1342), 1268 states have internal predecessors, (1342), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1344 transitions. [2022-07-21 05:12:43,737 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1344 transitions. Word has length 534 [2022-07-21 05:12:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:43,737 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1344 transitions. [2022-07-21 05:12:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1344 transitions. [2022-07-21 05:12:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-07-21 05:12:43,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:43,741 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:43,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:43,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 05:12:43,945 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1331699829, now seen corresponding path program 1 times [2022-07-21 05:12:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:43,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196348516] [2022-07-21 05:12:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-21 05:12:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196348516] [2022-07-21 05:12:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196348516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189978729] [2022-07-21 05:12:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:44,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 05:12:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 05:12:44,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-21 05:12:44,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-21 05:12:44,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189978729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:44,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:44,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-07-21 05:12:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015785375] [2022-07-21 05:12:45,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:45,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:12:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:12:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:12:45,001 INFO L87 Difference]: Start difference. First operand 1270 states and 1344 transitions. Second operand has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:45,405 INFO L93 Difference]: Finished difference Result 1630 states and 1731 transitions. [2022-07-21 05:12:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:12:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 582 [2022-07-21 05:12:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:45,414 INFO L225 Difference]: With dead ends: 1630 [2022-07-21 05:12:45,414 INFO L226 Difference]: Without dead ends: 1526 [2022-07-21 05:12:45,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1169 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-21 05:12:45,419 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 1204 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 5194 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:45,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 5194 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:12:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-07-21 05:12:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1269. [2022-07-21 05:12:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1267 states have (on average 1.0544593528018942) internal successors, (1336), 1267 states have internal predecessors, (1336), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1337 transitions. [2022-07-21 05:12:45,555 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1337 transitions. Word has length 582 [2022-07-21 05:12:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:45,555 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1337 transitions. [2022-07-21 05:12:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1337 transitions. [2022-07-21 05:12:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-07-21 05:12:45,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:45,559 INFO L195 NwaCegarLoop]: trace histogram [12, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:45,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:45,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 05:12:45,760 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 707297678, now seen corresponding path program 1 times [2022-07-21 05:12:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:45,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830611516] [2022-07-21 05:12:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 83 proven. 1033 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 05:12:46,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:46,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830611516] [2022-07-21 05:12:46,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830611516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:46,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414748076] [2022-07-21 05:12:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:46,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:46,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 05:12:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 05:12:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 174 proven. 942 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 05:12:47,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 30 proven. 1086 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 05:12:48,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414748076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:48,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:48,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2022-07-21 05:12:48,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47796896] [2022-07-21 05:12:48,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:48,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 05:12:48,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 05:12:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 05:12:48,281 INFO L87 Difference]: Start difference. First operand 1269 states and 1337 transitions. Second operand has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:49,511 INFO L93 Difference]: Finished difference Result 1526 states and 1612 transitions. [2022-07-21 05:12:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 05:12:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 643 [2022-07-21 05:12:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:49,512 INFO L225 Difference]: With dead ends: 1526 [2022-07-21 05:12:49,512 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 05:12:49,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1289 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=5712, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 05:12:49,515 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 3599 mSDsluCounter, 19463 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 20265 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:49,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3599 Valid, 20265 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:12:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 05:12:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 05:12:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 05:12:49,516 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 643 [2022-07-21 05:12:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:49,516 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 05:12:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:12:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 05:12:49,517 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 05:12:49,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 05:12:49,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:49,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 05:12:59,010 WARN L233 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 442 DAG size of output: 442 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-21 05:13:13,677 WARN L233 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 450 DAG size of output: 450 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-21 05:13:22,318 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 442 DAG size of output: 442 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)