./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/bitvector/byte_add-1.i -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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:44:14,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:44:14,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:44:14,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:44:14,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:44:14,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:44:14,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:44:14,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:44:14,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:44:14,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:44:14,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:44:15,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:44:15,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:44:15,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:44:15,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:44:15,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:44:15,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:44:15,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:44:15,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:44:15,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:44:15,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:44:15,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:44:15,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:44:15,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:44:15,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:44:15,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:44:15,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:44:15,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:44:15,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:44:15,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:44:15,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:44:15,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:44:15,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:44:15,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:44:15,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:44:15,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:44:15,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:44:15,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:44:15,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:44:15,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:44:15,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:44:15,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:44:15,075 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:44:15,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:44:15,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:44:15,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:44:15,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:44:15,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:44:15,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:44:15,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:44:15,077 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:44:15,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:44:15,077 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:44:15,078 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:44:15,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:44:15,079 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:44:15,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:44:15,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:44:15,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:44:15,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:44:15,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:44:15,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:44:15,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:44:15,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:44:15,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:44:15,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:44:15,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:44:15,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:44:15,093 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:44:15,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:44:15,094 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:44:15,094 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2023-02-14 10:44:15,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:44:15,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:44:15,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:44:15,379 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:44:15,379 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:44:15,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2023-02-14 10:44:16,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:44:16,728 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:44:16,729 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2023-02-14 10:44:16,735 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea5ca724/786389e866dc4b9f9453a6d90f07887d/FLAG8f0cff842 [2023-02-14 10:44:16,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea5ca724/786389e866dc4b9f9453a6d90f07887d [2023-02-14 10:44:16,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:44:16,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:44:16,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:44:16,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:44:16,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:44:16,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:44:16" (1/1) ... [2023-02-14 10:44:16,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d22f5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:16, skipping insertion in model container [2023-02-14 10:44:16,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:44:16" (1/1) ... [2023-02-14 10:44:16,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:44:16,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:44:16,939 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2023-02-14 10:44:16,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:44:16,996 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:44:17,008 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2023-02-14 10:44:17,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:44:17,051 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:44:17,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17 WrapperNode [2023-02-14 10:44:17,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:44:17,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:44:17,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:44:17,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:44:17,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,110 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 142 [2023-02-14 10:44:17,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:44:17,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:44:17,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:44:17,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:44:17,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:44:17,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:44:17,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:44:17,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:44:17,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (1/1) ... [2023-02-14 10:44:17,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:44:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:17,201 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) [2023-02-14 10:44:17,217 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 [2023-02-14 10:44:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:44:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:44:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:44:17,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:44:17,309 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:44:17,311 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:44:17,661 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:44:17,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:44:17,675 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 10:44:17,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:44:17 BoogieIcfgContainer [2023-02-14 10:44:17,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:44:17,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:44:17,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:44:17,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:44:17,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:44:16" (1/3) ... [2023-02-14 10:44:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:44:17, skipping insertion in model container [2023-02-14 10:44:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:44:17" (2/3) ... [2023-02-14 10:44:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:44:17, skipping insertion in model container [2023-02-14 10:44:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:44:17" (3/3) ... [2023-02-14 10:44:17,689 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2023-02-14 10:44:17,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:44:17,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:44:17,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:44:17,780 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6616d252, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:44:17,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:44:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 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) [2023-02-14 10:44:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 10:44:17,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:17,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:17,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash 903950584, now seen corresponding path program 1 times [2023-02-14 10:44:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859397905] [2023-02-14 10:44:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:17,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859397905] [2023-02-14 10:44:17,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859397905] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:17,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:17,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:44:17,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969327677] [2023-02-14 10:44:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:17,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:44:17,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:44:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:44:18,017 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-14 10:44:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:18,042 INFO L93 Difference]: Finished difference Result 64 states and 105 transitions. [2023-02-14 10:44:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:44:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 10:44:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:18,050 INFO L225 Difference]: With dead ends: 64 [2023-02-14 10:44:18,051 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 10:44:18,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:44:18,057 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:18,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:44:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 10:44:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-14 10:44:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 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) [2023-02-14 10:44:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 73 transitions. [2023-02-14 10:44:18,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 73 transitions. Word has length 13 [2023-02-14 10:44:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 73 transitions. [2023-02-14 10:44:18,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-14 10:44:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 73 transitions. [2023-02-14 10:44:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 10:44:18,087 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:18,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:44:18,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash 430337229, now seen corresponding path program 1 times [2023-02-14 10:44:18,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495966017] [2023-02-14 10:44:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:18,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:18,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495966017] [2023-02-14 10:44:18,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495966017] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:18,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:18,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:44:18,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14911354] [2023-02-14 10:44:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:44:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:44:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:44:18,356 INFO L87 Difference]: Start difference. First operand 43 states and 73 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 10:44:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:18,476 INFO L93 Difference]: Finished difference Result 102 states and 179 transitions. [2023-02-14 10:44:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:44:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 10:44:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:18,478 INFO L225 Difference]: With dead ends: 102 [2023-02-14 10:44:18,479 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:44:18,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:44:18,484 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:18,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:44:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-02-14 10:44:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 66 states have internal predecessors, (103), 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) [2023-02-14 10:44:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 103 transitions. [2023-02-14 10:44:18,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 103 transitions. Word has length 13 [2023-02-14 10:44:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:18,494 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 103 transitions. [2023-02-14 10:44:18,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 10:44:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 103 transitions. [2023-02-14 10:44:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 10:44:18,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:18,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:18,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:44:18,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2037878536, now seen corresponding path program 1 times [2023-02-14 10:44:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:18,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279674514] [2023-02-14 10:44:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279674514] [2023-02-14 10:44:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279674514] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:18,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:18,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804137852] [2023-02-14 10:44:18,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:18,643 INFO L87 Difference]: Start difference. First operand 67 states and 103 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 10:44:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:18,877 INFO L93 Difference]: Finished difference Result 168 states and 287 transitions. [2023-02-14 10:44:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:44:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 10:44:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:18,882 INFO L225 Difference]: With dead ends: 168 [2023-02-14 10:44:18,883 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 10:44:18,885 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 [2023-02-14 10:44:18,889 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:18,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 105 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:44:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 10:44:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2023-02-14 10:44:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 92 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 143 transitions. [2023-02-14 10:44:18,913 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 143 transitions. Word has length 19 [2023-02-14 10:44:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:18,914 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 143 transitions. [2023-02-14 10:44:18,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 10:44:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 143 transitions. [2023-02-14 10:44:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 10:44:18,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:18,916 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] [2023-02-14 10:44:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 10:44:18,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -21369817, now seen corresponding path program 1 times [2023-02-14 10:44:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928622661] [2023-02-14 10:44:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:44:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:19,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928622661] [2023-02-14 10:44:19,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928622661] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:19,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:19,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879923451] [2023-02-14 10:44:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:19,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:19,120 INFO L87 Difference]: Start difference. First operand 93 states and 143 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-02-14 10:44:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:19,287 INFO L93 Difference]: Finished difference Result 272 states and 412 transitions. [2023-02-14 10:44:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 10:44:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:19,289 INFO L225 Difference]: With dead ends: 272 [2023-02-14 10:44:19,289 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 10:44:19,290 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 [2023-02-14 10:44:19,295 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 105 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:19,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 201 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 10:44:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 101. [2023-02-14 10:44:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.52) internal successors, (152), 100 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 152 transitions. [2023-02-14 10:44:19,320 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 152 transitions. Word has length 25 [2023-02-14 10:44:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:19,320 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 152 transitions. [2023-02-14 10:44:19,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-02-14 10:44:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 152 transitions. [2023-02-14 10:44:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 10:44:19,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:19,325 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] [2023-02-14 10:44:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 10:44:19,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash -53067146, now seen corresponding path program 1 times [2023-02-14 10:44:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:19,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046989949] [2023-02-14 10:44:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:44:19,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046989949] [2023-02-14 10:44:19,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046989949] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:19,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:19,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:44:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164028465] [2023-02-14 10:44:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:19,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:19,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:44:19,436 INFO L87 Difference]: Start difference. First operand 101 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-14 10:44:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:19,596 INFO L93 Difference]: Finished difference Result 293 states and 438 transitions. [2023-02-14 10:44:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:19,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-14 10:44:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:19,598 INFO L225 Difference]: With dead ends: 293 [2023-02-14 10:44:19,598 INFO L226 Difference]: Without dead ends: 212 [2023-02-14 10:44:19,598 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 [2023-02-14 10:44:19,599 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 109 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:19,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-14 10:44:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 111. [2023-02-14 10:44:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.5) internal successors, (165), 110 states have internal predecessors, (165), 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) [2023-02-14 10:44:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 165 transitions. [2023-02-14 10:44:19,606 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 165 transitions. Word has length 26 [2023-02-14 10:44:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:19,606 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 165 transitions. [2023-02-14 10:44:19,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-14 10:44:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 165 transitions. [2023-02-14 10:44:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 10:44:19,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:19,607 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] [2023-02-14 10:44:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 10:44:19,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1351948728, now seen corresponding path program 1 times [2023-02-14 10:44:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170321210] [2023-02-14 10:44:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:19,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:19,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170321210] [2023-02-14 10:44:19,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170321210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:19,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820760449] [2023-02-14 10:44:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:19,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:19,693 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) [2023-02-14 10:44:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:44:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 10:44:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:44:19,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820760449] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:19,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:19,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-14 10:44:19,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15205785] [2023-02-14 10:44:19,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:44:19,841 INFO L87 Difference]: Start difference. First operand 111 states and 165 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:21,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:24,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:26,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:28,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:30,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:30,790 INFO L93 Difference]: Finished difference Result 243 states and 386 transitions. [2023-02-14 10:44:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 10:44:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:30,792 INFO L225 Difference]: With dead ends: 243 [2023-02-14 10:44:30,792 INFO L226 Difference]: Without dead ends: 165 [2023-02-14 10:44:30,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:44:30,793 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 32 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:30,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 155 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 159 Invalid, 5 Unknown, 0 Unchecked, 10.9s Time] [2023-02-14 10:44:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-14 10:44:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2023-02-14 10:44:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4482758620689655) internal successors, (210), 145 states have internal predecessors, (210), 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) [2023-02-14 10:44:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 210 transitions. [2023-02-14 10:44:30,809 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 210 transitions. Word has length 27 [2023-02-14 10:44:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:30,810 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 210 transitions. [2023-02-14 10:44:30,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 210 transitions. [2023-02-14 10:44:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 10:44:30,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:30,812 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:31,013 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,SelfDestructingSolverStorable5 [2023-02-14 10:44:31,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1822488285, now seen corresponding path program 1 times [2023-02-14 10:44:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:31,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216893982] [2023-02-14 10:44:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:31,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:31,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216893982] [2023-02-14 10:44:31,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216893982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:31,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917178375] [2023-02-14 10:44:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:31,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:31,219 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) [2023-02-14 10:44:31,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:44:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 10:44:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 10:44:31,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:31,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917178375] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:31,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:31,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-02-14 10:44:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165598202] [2023-02-14 10:44:31,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:31,386 INFO L87 Difference]: Start difference. First operand 146 states and 210 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:34,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:36,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:38,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:44:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:38,594 INFO L93 Difference]: Finished difference Result 293 states and 432 transitions. [2023-02-14 10:44:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:44:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 10:44:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:38,595 INFO L225 Difference]: With dead ends: 293 [2023-02-14 10:44:38,595 INFO L226 Difference]: Without dead ends: 180 [2023-02-14 10:44:38,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:38,596 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:38,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 144 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 122 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2023-02-14 10:44:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-14 10:44:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2023-02-14 10:44:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 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) [2023-02-14 10:44:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2023-02-14 10:44:38,604 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 33 [2023-02-14 10:44:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:38,604 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2023-02-14 10:44:38,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2023-02-14 10:44:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 10:44:38,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:38,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:38,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:38,810 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,SelfDestructingSolverStorable6 [2023-02-14 10:44:38,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1102774418, now seen corresponding path program 1 times [2023-02-14 10:44:38,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:38,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570343378] [2023-02-14 10:44:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:44:38,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570343378] [2023-02-14 10:44:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570343378] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:38,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:38,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:44:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778926569] [2023-02-14 10:44:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:44:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:44:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:38,975 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-14 10:44:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:39,345 INFO L93 Difference]: Finished difference Result 568 states and 802 transitions. [2023-02-14 10:44:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:44:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-14 10:44:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:39,348 INFO L225 Difference]: With dead ends: 568 [2023-02-14 10:44:39,348 INFO L226 Difference]: Without dead ends: 446 [2023-02-14 10:44:39,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:39,349 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 222 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:39,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 408 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:44:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-02-14 10:44:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 152. [2023-02-14 10:44:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 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) [2023-02-14 10:44:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2023-02-14 10:44:39,358 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 39 [2023-02-14 10:44:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:39,359 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2023-02-14 10:44:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-14 10:44:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2023-02-14 10:44:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 10:44:39,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:39,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 10:44:39,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash 586309563, now seen corresponding path program 1 times [2023-02-14 10:44:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:39,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336620584] [2023-02-14 10:44:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:44:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336620584] [2023-02-14 10:44:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336620584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:39,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:39,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:44:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896802749] [2023-02-14 10:44:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:44:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:44:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:39,505 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:39,898 INFO L93 Difference]: Finished difference Result 548 states and 777 transitions. [2023-02-14 10:44:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:44:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-14 10:44:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:39,900 INFO L225 Difference]: With dead ends: 548 [2023-02-14 10:44:39,900 INFO L226 Difference]: Without dead ends: 427 [2023-02-14 10:44:39,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:39,901 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 211 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:39,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 373 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:44:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2023-02-14 10:44:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 152. [2023-02-14 10:44:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 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) [2023-02-14 10:44:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2023-02-14 10:44:39,911 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 40 [2023-02-14 10:44:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:39,912 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2023-02-14 10:44:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2023-02-14 10:44:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:44:39,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:39,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 10:44:39,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash 46140685, now seen corresponding path program 1 times [2023-02-14 10:44:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908539909] [2023-02-14 10:44:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:44:40,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908539909] [2023-02-14 10:44:40,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908539909] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:40,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:40,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 10:44:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405655108] [2023-02-14 10:44:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:44:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:44:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:44:40,062 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:40,660 INFO L93 Difference]: Finished difference Result 691 states and 976 transitions. [2023-02-14 10:44:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:44:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-14 10:44:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:40,662 INFO L225 Difference]: With dead ends: 691 [2023-02-14 10:44:40,662 INFO L226 Difference]: Without dead ends: 570 [2023-02-14 10:44:40,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:44:40,663 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 317 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:40,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 634 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:44:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-02-14 10:44:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 152. [2023-02-14 10:44:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 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) [2023-02-14 10:44:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2023-02-14 10:44:40,675 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 41 [2023-02-14 10:44:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:40,675 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2023-02-14 10:44:40,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2023-02-14 10:44:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:44:40,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:40,681 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 10:44:40,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash 118527243, now seen corresponding path program 1 times [2023-02-14 10:44:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:40,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356756644] [2023-02-14 10:44:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:40,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:44:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356756644] [2023-02-14 10:44:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356756644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:40,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:40,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 10:44:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252452153] [2023-02-14 10:44:40,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:40,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:44:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:44:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:40,855 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:41,642 INFO L93 Difference]: Finished difference Result 735 states and 1032 transitions. [2023-02-14 10:44:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 10:44:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-14 10:44:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:41,644 INFO L225 Difference]: With dead ends: 735 [2023-02-14 10:44:41,644 INFO L226 Difference]: Without dead ends: 613 [2023-02-14 10:44:41,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:44:41,645 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 447 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:41,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 846 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 10:44:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-02-14 10:44:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 140. [2023-02-14 10:44:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4244604316546763) internal successors, (198), 139 states have internal predecessors, (198), 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) [2023-02-14 10:44:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2023-02-14 10:44:41,671 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 41 [2023-02-14 10:44:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:41,672 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2023-02-14 10:44:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2023-02-14 10:44:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 10:44:41,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:41,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-02-14 10:44:41,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 10:44:41,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash 349916387, now seen corresponding path program 1 times [2023-02-14 10:44:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224895346] [2023-02-14 10:44:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 10:44:41,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:41,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224895346] [2023-02-14 10:44:41,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224895346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:41,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045562864] [2023-02-14 10:44:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:41,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:41,813 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) [2023-02-14 10:44:41,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:44:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:41,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:44:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 10:44:41,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:44:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:44:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045562864] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:44:42,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:44:42,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 7 [2023-02-14 10:44:42,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87034717] [2023-02-14 10:44:42,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:44:42,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:44:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:44:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:42,102 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:42,457 INFO L93 Difference]: Finished difference Result 385 states and 546 transitions. [2023-02-14 10:44:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:44:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-14 10:44:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:42,458 INFO L225 Difference]: With dead ends: 385 [2023-02-14 10:44:42,459 INFO L226 Difference]: Without dead ends: 266 [2023-02-14 10:44:42,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:44:42,459 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 189 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:44:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-14 10:44:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 170. [2023-02-14 10:44:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4023668639053255) internal successors, (237), 169 states have internal predecessors, (237), 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) [2023-02-14 10:44:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 237 transitions. [2023-02-14 10:44:42,471 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 237 transitions. Word has length 46 [2023-02-14 10:44:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:42,471 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 237 transitions. [2023-02-14 10:44:42,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 237 transitions. [2023-02-14 10:44:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 10:44:42,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:42,472 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-02-14 10:44:42,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:42,673 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2129976584, now seen corresponding path program 1 times [2023-02-14 10:44:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556455261] [2023-02-14 10:44:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 10:44:42,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556455261] [2023-02-14 10:44:42,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556455261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368336600] [2023-02-14 10:44:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:42,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:42,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:42,965 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) [2023-02-14 10:44:42,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:44:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 10:44:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:44:43,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368336600] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:43,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:43,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-02-14 10:44:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647413826] [2023-02-14 10:44:43,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:43,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:44:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:44:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:44:43,137 INFO L87 Difference]: Start difference. First operand 170 states and 237 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-02-14 10:44:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:43,293 INFO L93 Difference]: Finished difference Result 507 states and 716 transitions. [2023-02-14 10:44:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:44:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-14 10:44:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:43,295 INFO L225 Difference]: With dead ends: 507 [2023-02-14 10:44:43,295 INFO L226 Difference]: Without dead ends: 330 [2023-02-14 10:44:43,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:43,296 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 64 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:43,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 173 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:44:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-14 10:44:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 304. [2023-02-14 10:44:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.3828382838283828) internal successors, (419), 303 states have internal predecessors, (419), 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) [2023-02-14 10:44:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 419 transitions. [2023-02-14 10:44:43,328 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 419 transitions. Word has length 46 [2023-02-14 10:44:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:43,329 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 419 transitions. [2023-02-14 10:44:43,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-02-14 10:44:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 419 transitions. [2023-02-14 10:44:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 10:44:43,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:43,330 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-02-14 10:44:43,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:43,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:43,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1028751178, now seen corresponding path program 1 times [2023-02-14 10:44:43,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:43,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845777023] [2023-02-14 10:44:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:43,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 10:44:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:43,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845777023] [2023-02-14 10:44:43,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845777023] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:43,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165364177] [2023-02-14 10:44:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:43,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:43,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:43,721 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) [2023-02-14 10:44:43,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:44:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:44:43,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:44:44,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:44,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165364177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:44,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:44,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-02-14 10:44:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907364315] [2023-02-14 10:44:44,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:44:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:44:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:44:44,025 INFO L87 Difference]: Start difference. First operand 304 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2023-02-14 10:44:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:44,371 INFO L93 Difference]: Finished difference Result 855 states and 1203 transitions. [2023-02-14 10:44:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 10:44:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-14 10:44:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:44,374 INFO L225 Difference]: With dead ends: 855 [2023-02-14 10:44:44,374 INFO L226 Difference]: Without dead ends: 558 [2023-02-14 10:44:44,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-14 10:44:44,375 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 178 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:44,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 335 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:44:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-02-14 10:44:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 473. [2023-02-14 10:44:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.375) internal successors, (649), 472 states have internal predecessors, (649), 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) [2023-02-14 10:44:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 649 transitions. [2023-02-14 10:44:44,400 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 649 transitions. Word has length 47 [2023-02-14 10:44:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 649 transitions. [2023-02-14 10:44:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2023-02-14 10:44:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 649 transitions. [2023-02-14 10:44:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 10:44:44,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:44,402 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-14 10:44:44,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 10:44:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 10:44:44,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash 464495987, now seen corresponding path program 1 times [2023-02-14 10:44:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408719622] [2023-02-14 10:44:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:44:44,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408719622] [2023-02-14 10:44:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408719622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:44,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 10:44:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334070523] [2023-02-14 10:44:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:44:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:44:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:44:44,787 INFO L87 Difference]: Start difference. First operand 473 states and 649 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2023-02-14 10:44:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:45,569 INFO L93 Difference]: Finished difference Result 2429 states and 3300 transitions. [2023-02-14 10:44:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 10:44:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-14 10:44:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:45,576 INFO L225 Difference]: With dead ends: 2429 [2023-02-14 10:44:45,576 INFO L226 Difference]: Without dead ends: 2009 [2023-02-14 10:44:45,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:44:45,577 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 391 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:45,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 759 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 10:44:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2023-02-14 10:44:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 461. [2023-02-14 10:44:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.3847826086956523) internal successors, (637), 460 states have internal predecessors, (637), 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) [2023-02-14 10:44:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 637 transitions. [2023-02-14 10:44:45,611 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 637 transitions. Word has length 48 [2023-02-14 10:44:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:45,611 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 637 transitions. [2023-02-14 10:44:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2023-02-14 10:44:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 637 transitions. [2023-02-14 10:44:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:44:45,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:45,613 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:45,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 10:44:45,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1918369908, now seen corresponding path program 1 times [2023-02-14 10:44:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:45,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328795266] [2023-02-14 10:44:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:44:45,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328795266] [2023-02-14 10:44:45,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328795266] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:45,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:44:45,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:44:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106545479] [2023-02-14 10:44:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:44:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:44:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:44:45,747 INFO L87 Difference]: Start difference. First operand 461 states and 637 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:45,960 INFO L93 Difference]: Finished difference Result 1471 states and 2041 transitions. [2023-02-14 10:44:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:44:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-14 10:44:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:45,965 INFO L225 Difference]: With dead ends: 1471 [2023-02-14 10:44:45,965 INFO L226 Difference]: Without dead ends: 980 [2023-02-14 10:44:45,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:44:45,967 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:45,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 196 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:44:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-02-14 10:44:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 862. [2023-02-14 10:44:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.372822299651568) internal successors, (1182), 861 states have internal predecessors, (1182), 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) [2023-02-14 10:44:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1182 transitions. [2023-02-14 10:44:46,009 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1182 transitions. Word has length 50 [2023-02-14 10:44:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:46,010 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1182 transitions. [2023-02-14 10:44:46,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1182 transitions. [2023-02-14 10:44:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 10:44:46,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:46,011 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:46,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 10:44:46,012 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash 304907087, now seen corresponding path program 1 times [2023-02-14 10:44:46,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055499572] [2023-02-14 10:44:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 10:44:46,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055499572] [2023-02-14 10:44:46,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055499572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679083015] [2023-02-14 10:44:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:46,213 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) [2023-02-14 10:44:46,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:44:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 10:44:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:44:46,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:46,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679083015] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:46,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:46,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-14 10:44:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695178402] [2023-02-14 10:44:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:44:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:44:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:44:46,478 INFO L87 Difference]: Start difference. First operand 862 states and 1182 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:46,998 INFO L93 Difference]: Finished difference Result 2001 states and 2744 transitions. [2023-02-14 10:44:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 10:44:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-14 10:44:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:47,003 INFO L225 Difference]: With dead ends: 2001 [2023-02-14 10:44:47,003 INFO L226 Difference]: Without dead ends: 1508 [2023-02-14 10:44:47,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:44:47,005 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 354 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 528 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 10:44:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2023-02-14 10:44:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1231. [2023-02-14 10:44:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 1.3699186991869918) internal successors, (1685), 1230 states have internal predecessors, (1685), 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) [2023-02-14 10:44:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1685 transitions. [2023-02-14 10:44:47,070 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1685 transitions. Word has length 51 [2023-02-14 10:44:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:47,071 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1685 transitions. [2023-02-14 10:44:47,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:44:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1685 transitions. [2023-02-14 10:44:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 10:44:47,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:47,073 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:47,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 10:44:47,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1008226627, now seen corresponding path program 1 times [2023-02-14 10:44:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:47,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811687371] [2023-02-14 10:44:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 10:44:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:44:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811687371] [2023-02-14 10:44:47,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811687371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:44:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133982426] [2023-02-14 10:44:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:47,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:47,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:44:47,497 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) [2023-02-14 10:44:47,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:44:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:44:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 10:44:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:44:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:44:47,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:44:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133982426] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:44:47,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:44:47,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 16 [2023-02-14 10:44:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571045885] [2023-02-14 10:44:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:44:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:44:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:44:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:44:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:44:47,825 INFO L87 Difference]: Start difference. First operand 1231 states and 1685 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2023-02-14 10:44:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:44:49,003 INFO L93 Difference]: Finished difference Result 2698 states and 3690 transitions. [2023-02-14 10:44:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 10:44:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-14 10:44:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:44:49,010 INFO L225 Difference]: With dead ends: 2698 [2023-02-14 10:44:49,011 INFO L226 Difference]: Without dead ends: 2247 [2023-02-14 10:44:49,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-02-14 10:44:49,013 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 678 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:44:49,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 2094 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 10:44:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2023-02-14 10:44:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1778. [2023-02-14 10:44:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.3725379853685988) internal successors, (2439), 1777 states have internal predecessors, (2439), 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) [2023-02-14 10:44:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2439 transitions. [2023-02-14 10:44:49,117 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2439 transitions. Word has length 52 [2023-02-14 10:44:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:44:49,117 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2439 transitions. [2023-02-14 10:44:49,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2023-02-14 10:44:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2439 transitions. [2023-02-14 10:44:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 10:44:49,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:44:49,120 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:44:49,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:44:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:44:49,326 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:44:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:44:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1041161215, now seen corresponding path program 1 times [2023-02-14 10:44:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:44:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018852202] [2023-02-14 10:44:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:44:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:44:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat