./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:25:57,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:25:57,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:25:57,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:25:57,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:25:57,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:25:57,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:25:57,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:25:57,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:25:57,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:25:57,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:25:57,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:25:57,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:25:57,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:25:57,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:25:57,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:25:57,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:25:57,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:25:57,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:25:57,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:25:57,115 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:25:57,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:25:57,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:25:57,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:25:57,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:25:57,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:25:57,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:25:57,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:25:57,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:25:57,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:25:57,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:25:57,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:25:57,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:25:57,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:25:57,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:25:57,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:25:57,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:25:57,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:25:57,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:25:57,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:25:57,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:25:57,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:25:57,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:25:57,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:25:57,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:25:57,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:25:57,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:25:57,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:25:57,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:25:57,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:25:57,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:25:57,159 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:25:57,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:25:57,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:25:57,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:25:57,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:25:57,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:25:57,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:25:57,163 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:25:57,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:25:57,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:25:57,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-07-20 22:25:57,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:25:57,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:25:57,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:25:57,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:25:57,365 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:25:57,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-20 22:25:57,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd76389b3/ee0aa691e17c4291beea22915e051680/FLAGfa3adadc7 [2022-07-20 22:25:57,799 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:25:57,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-20 22:25:57,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd76389b3/ee0aa691e17c4291beea22915e051680/FLAGfa3adadc7 [2022-07-20 22:25:57,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd76389b3/ee0aa691e17c4291beea22915e051680 [2022-07-20 22:25:57,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:25:57,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:25:57,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:25:57,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:25:57,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:25:57,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:25:57" (1/1) ... [2022-07-20 22:25:57,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2f3967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:57, skipping insertion in model container [2022-07-20 22:25:57,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:25:57" (1/1) ... [2022-07-20 22:25:57,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:25:57,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:25:57,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-07-20 22:25:58,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:25:58,018 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:25:58,025 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-07-20 22:25:58,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:25:58,058 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:25:58,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58 WrapperNode [2022-07-20 22:25:58,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:25:58,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:25:58,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:25:58,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:25:58,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,095 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 214 [2022-07-20 22:25:58,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:25:58,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:25:58,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:25:58,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:25:58,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:25:58,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:25:58,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:25:58,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:25:58,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (1/1) ... [2022-07-20 22:25:58,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:25:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:25:58,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:25:58,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:25:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:25:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:25:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-20 22:25:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-20 22:25:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:25:58,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:25:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 22:25:58,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 22:25:58,224 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:25:58,225 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:25:58,531 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:25:58,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:25:58,539 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 22:25:58,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:25:58 BoogieIcfgContainer [2022-07-20 22:25:58,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:25:58,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:25:58,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:25:58,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:25:58,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:25:57" (1/3) ... [2022-07-20 22:25:58,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcd5233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:25:58, skipping insertion in model container [2022-07-20 22:25:58,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:25:58" (2/3) ... [2022-07-20 22:25:58,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcd5233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:25:58, skipping insertion in model container [2022-07-20 22:25:58,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:25:58" (3/3) ... [2022-07-20 22:25:58,546 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-07-20 22:25:58,556 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:25:58,556 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:25:58,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:25:58,613 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@def431a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6330825b [2022-07-20 22:25:58,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:25:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 94 states have (on average 1.7234042553191489) internal successors, (162), 97 states have internal predecessors, (162), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:25:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 22:25:58,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:25:58,624 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 22:25:58,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:25:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:25:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 34880883, now seen corresponding path program 1 times [2022-07-20 22:25:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:25:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118969254] [2022-07-20 22:25:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:25:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:58,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:25:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:58,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:25:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:58,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:25:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:25:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:25:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118969254] [2022-07-20 22:25:58,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118969254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:25:58,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:25:58,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:25:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771208958] [2022-07-20 22:25:58,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:25:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:25:58,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:25:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:25:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:58,909 INFO L87 Difference]: Start difference. First operand has 106 states, 94 states have (on average 1.7234042553191489) internal successors, (162), 97 states have internal predecessors, (162), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:25:59,032 INFO L93 Difference]: Finished difference Result 276 states and 479 transitions. [2022-07-20 22:25:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:25:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-20 22:25:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:25:59,041 INFO L225 Difference]: With dead ends: 276 [2022-07-20 22:25:59,043 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 22:25:59,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:59,052 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 111 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:25:59,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 434 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:25:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 22:25:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2022-07-20 22:25:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 134 states have (on average 1.492537313432836) internal successors, (200), 136 states have internal predecessors, (200), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 22:25:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 219 transitions. [2022-07-20 22:25:59,093 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 219 transitions. Word has length 37 [2022-07-20 22:25:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:25:59,093 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 219 transitions. [2022-07-20 22:25:59,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 219 transitions. [2022-07-20 22:25:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 22:25:59,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:25:59,100 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:25:59,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:25:59,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:25:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:25:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash 455630144, now seen corresponding path program 1 times [2022-07-20 22:25:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:25:59,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421227126] [2022-07-20 22:25:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:59,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:25:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:25:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:25:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:25:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:25:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:25:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421227126] [2022-07-20 22:25:59,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421227126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:25:59,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:25:59,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:25:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896917521] [2022-07-20 22:25:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:25:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:25:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:25:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:25:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:59,184 INFO L87 Difference]: Start difference. First operand 147 states and 219 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:25:59,227 INFO L93 Difference]: Finished difference Result 275 states and 410 transitions. [2022-07-20 22:25:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:25:59,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-20 22:25:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:25:59,229 INFO L225 Difference]: With dead ends: 275 [2022-07-20 22:25:59,230 INFO L226 Difference]: Without dead ends: 236 [2022-07-20 22:25:59,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:59,231 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 103 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:25:59,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 431 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:25:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-20 22:25:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-07-20 22:25:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 202 states have (on average 1.4504950495049505) internal successors, (293), 205 states have internal predecessors, (293), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 22:25:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 319 transitions. [2022-07-20 22:25:59,246 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 319 transitions. Word has length 39 [2022-07-20 22:25:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:25:59,246 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 319 transitions. [2022-07-20 22:25:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 319 transitions. [2022-07-20 22:25:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:25:59,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:25:59,249 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:25:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:25:59,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:25:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:25:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash -999534858, now seen corresponding path program 1 times [2022-07-20 22:25:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:25:59,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9793495] [2022-07-20 22:25:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:25:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:25:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:25:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:25:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:25:59,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:25:59,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9793495] [2022-07-20 22:25:59,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9793495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:25:59,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:25:59,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:25:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017873356] [2022-07-20 22:25:59,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:25:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:25:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:25:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:25:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:25:59,325 INFO L87 Difference]: Start difference. First operand 219 states and 319 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:25:59,399 INFO L93 Difference]: Finished difference Result 353 states and 519 transitions. [2022-07-20 22:25:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:25:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 22:25:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:25:59,404 INFO L225 Difference]: With dead ends: 353 [2022-07-20 22:25:59,404 INFO L226 Difference]: Without dead ends: 321 [2022-07-20 22:25:59,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:25:59,406 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 208 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:25:59,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 700 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:25:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-20 22:25:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-07-20 22:25:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 252 states have (on average 1.4523809523809523) internal successors, (366), 256 states have internal predecessors, (366), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 22:25:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 400 transitions. [2022-07-20 22:25:59,421 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 400 transitions. Word has length 40 [2022-07-20 22:25:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:25:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 400 transitions. [2022-07-20 22:25:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 400 transitions. [2022-07-20 22:25:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:25:59,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:25:59,423 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:25:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:25:59,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:25:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:25:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2020603212, now seen corresponding path program 1 times [2022-07-20 22:25:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:25:59,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303910290] [2022-07-20 22:25:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:25:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:25:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:25:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:25:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:25:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:25:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303910290] [2022-07-20 22:25:59,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303910290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:25:59,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:25:59,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:25:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393385434] [2022-07-20 22:25:59,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:25:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:25:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:25:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:25:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:59,486 INFO L87 Difference]: Start difference. First operand 273 states and 400 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:25:59,520 INFO L93 Difference]: Finished difference Result 294 states and 430 transitions. [2022-07-20 22:25:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:25:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 22:25:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:25:59,522 INFO L225 Difference]: With dead ends: 294 [2022-07-20 22:25:59,522 INFO L226 Difference]: Without dead ends: 287 [2022-07-20 22:25:59,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:25:59,523 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 45 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:25:59,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 402 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:25:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-20 22:25:59,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-07-20 22:25:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 253 states have (on average 1.4505928853754941) internal successors, (367), 257 states have internal predecessors, (367), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 22:25:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2022-07-20 22:25:59,536 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 401 transitions. Word has length 40 [2022-07-20 22:25:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:25:59,536 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-20 22:25:59,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:25:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 401 transitions. [2022-07-20 22:25:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 22:25:59,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:25:59,538 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:25:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:25:59,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:25:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:25:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 979727251, now seen corresponding path program 1 times [2022-07-20 22:25:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:25:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267890965] [2022-07-20 22:25:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:25:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:25:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:25:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:25:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:25:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:25:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267890965] [2022-07-20 22:25:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267890965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:25:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659183256] [2022-07-20 22:25:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:25:59,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:25:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:25:59,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:25:59,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:25:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:25:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:25:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:25:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:25:59,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:00,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659183256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:00,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:00,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-07-20 22:26:00,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584399529] [2022-07-20 22:26:00,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:00,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 22:26:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 22:26:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:00,050 INFO L87 Difference]: Start difference. First operand 274 states and 401 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 22:26:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:00,565 INFO L93 Difference]: Finished difference Result 561 states and 847 transitions. [2022-07-20 22:26:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:26:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-07-20 22:26:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:00,569 INFO L225 Difference]: With dead ends: 561 [2022-07-20 22:26:00,569 INFO L226 Difference]: Without dead ends: 290 [2022-07-20 22:26:00,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-07-20 22:26:00,575 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 539 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:00,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1770 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:26:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-20 22:26:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-07-20 22:26:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 155 states have (on average 1.4322580645161291) internal successors, (222), 158 states have internal predecessors, (222), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-20 22:26:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-07-20 22:26:00,597 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 41 [2022-07-20 22:26:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:00,598 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-07-20 22:26:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 22:26:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-07-20 22:26:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:00,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:00,602 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:00,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:00,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1984626021, now seen corresponding path program 1 times [2022-07-20 22:26:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:00,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672223805] [2022-07-20 22:26:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:00,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:00,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672223805] [2022-07-20 22:26:00,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672223805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:00,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:00,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033505472] [2022-07-20 22:26:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:00,869 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:00,906 INFO L93 Difference]: Finished difference Result 205 states and 301 transitions. [2022-07-20 22:26:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-20 22:26:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:00,908 INFO L225 Difference]: With dead ends: 205 [2022-07-20 22:26:00,909 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 22:26:00,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:00,909 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 176 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:00,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 530 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 22:26:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-07-20 22:26:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 147 states have (on average 1.4149659863945578) internal successors, (208), 149 states have internal predecessors, (208), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 22:26:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-20 22:26:00,915 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 43 [2022-07-20 22:26:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:00,915 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-20 22:26:00,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-20 22:26:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:00,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:00,915 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:26:00,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2064334730, now seen corresponding path program 1 times [2022-07-20 22:26:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:00,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984008109] [2022-07-20 22:26:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:00,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:00,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984008109] [2022-07-20 22:26:00,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984008109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:00,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:00,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322856415] [2022-07-20 22:26:00,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:00,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:00,978 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:01,022 INFO L93 Difference]: Finished difference Result 178 states and 255 transitions. [2022-07-20 22:26:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:01,025 INFO L225 Difference]: With dead ends: 178 [2022-07-20 22:26:01,026 INFO L226 Difference]: Without dead ends: 171 [2022-07-20 22:26:01,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:01,026 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 42 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:01,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 679 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-20 22:26:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2022-07-20 22:26:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 146 states have (on average 1.404109589041096) internal successors, (205), 148 states have internal predecessors, (205), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 22:26:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2022-07-20 22:26:01,044 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 44 [2022-07-20 22:26:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:01,044 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2022-07-20 22:26:01,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2022-07-20 22:26:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:01,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:01,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 22:26:01,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:26:01,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash 659916354, now seen corresponding path program 1 times [2022-07-20 22:26:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110025850] [2022-07-20 22:26:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110025850] [2022-07-20 22:26:01,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110025850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171754061] [2022-07-20 22:26:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:01,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:01,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:26:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:26:01,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:26:01,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171754061] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:01,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:01,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2022-07-20 22:26:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433236363] [2022-07-20 22:26:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:01,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:01,374 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:01,434 INFO L93 Difference]: Finished difference Result 392 states and 558 transitions. [2022-07-20 22:26:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:01,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:01,437 INFO L225 Difference]: With dead ends: 392 [2022-07-20 22:26:01,437 INFO L226 Difference]: Without dead ends: 280 [2022-07-20 22:26:01,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:01,439 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 86 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:01,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 698 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-20 22:26:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-07-20 22:26:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 254 states have (on average 1.3858267716535433) internal successors, (352), 255 states have internal predecessors, (352), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 391 transitions. [2022-07-20 22:26:01,448 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 391 transitions. Word has length 45 [2022-07-20 22:26:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:01,449 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 391 transitions. [2022-07-20 22:26:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 391 transitions. [2022-07-20 22:26:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:01,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:01,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 22:26:01,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:01,668 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,SelfDestructingSolverStorable7 [2022-07-20 22:26:01,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -351200896, now seen corresponding path program 1 times [2022-07-20 22:26:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187790726] [2022-07-20 22:26:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187790726] [2022-07-20 22:26:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187790726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:01,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4502926] [2022-07-20 22:26:01,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:01,712 INFO L87 Difference]: Start difference. First operand 276 states and 391 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:01,757 INFO L93 Difference]: Finished difference Result 422 states and 598 transitions. [2022-07-20 22:26:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:01,759 INFO L225 Difference]: With dead ends: 422 [2022-07-20 22:26:01,759 INFO L226 Difference]: Without dead ends: 382 [2022-07-20 22:26:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:01,760 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 188 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 537 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-20 22:26:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 311. [2022-07-20 22:26:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 289 states have (on average 1.3806228373702423) internal successors, (399), 289 states have internal predecessors, (399), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 438 transitions. [2022-07-20 22:26:01,769 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 438 transitions. Word has length 45 [2022-07-20 22:26:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:01,769 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 438 transitions. [2022-07-20 22:26:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 438 transitions. [2022-07-20 22:26:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:01,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:01,770 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:01,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:26:01,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 33312567, now seen corresponding path program 1 times [2022-07-20 22:26:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61885115] [2022-07-20 22:26:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:01,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61885115] [2022-07-20 22:26:01,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61885115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:01,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:01,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:01,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432369292] [2022-07-20 22:26:01,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:01,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:01,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:01,803 INFO L87 Difference]: Start difference. First operand 311 states and 438 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:01,839 INFO L93 Difference]: Finished difference Result 335 states and 469 transitions. [2022-07-20 22:26:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:01,841 INFO L225 Difference]: With dead ends: 335 [2022-07-20 22:26:01,841 INFO L226 Difference]: Without dead ends: 319 [2022-07-20 22:26:01,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:01,842 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 38 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:01,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-20 22:26:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2022-07-20 22:26:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 289 states have (on average 1.3737024221453287) internal successors, (397), 289 states have internal predecessors, (397), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 436 transitions. [2022-07-20 22:26:01,851 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 436 transitions. Word has length 48 [2022-07-20 22:26:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:01,852 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 436 transitions. [2022-07-20 22:26:01,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 436 transitions. [2022-07-20 22:26:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:01,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:01,852 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:01,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:26:01,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash -667752011, now seen corresponding path program 1 times [2022-07-20 22:26:01,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:01,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166623153] [2022-07-20 22:26:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166623153] [2022-07-20 22:26:01,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166623153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490830234] [2022-07-20 22:26:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:01,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:01,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:01,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:26:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:26:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:02,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:02,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490830234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:02,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:02,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-20 22:26:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012221867] [2022-07-20 22:26:02,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:02,048 INFO L87 Difference]: Start difference. First operand 311 states and 436 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:02,171 INFO L93 Difference]: Finished difference Result 603 states and 839 transitions. [2022-07-20 22:26:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:02,174 INFO L225 Difference]: With dead ends: 603 [2022-07-20 22:26:02,174 INFO L226 Difference]: Without dead ends: 551 [2022-07-20 22:26:02,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:02,175 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 145 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:02,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 808 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-20 22:26:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 443. [2022-07-20 22:26:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 414 states have (on average 1.3429951690821256) internal successors, (556), 415 states have internal predecessors, (556), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 25 states have call predecessors, (28), 22 states have call successors, (28) [2022-07-20 22:26:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 608 transitions. [2022-07-20 22:26:02,185 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 608 transitions. Word has length 48 [2022-07-20 22:26:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 608 transitions. [2022-07-20 22:26:02,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 608 transitions. [2022-07-20 22:26:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:02,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:02,186 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:02,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:02,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:02,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:02,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1653689311, now seen corresponding path program 1 times [2022-07-20 22:26:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:02,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069788358] [2022-07-20 22:26:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:02,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:02,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:02,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069788358] [2022-07-20 22:26:02,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069788358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:02,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:02,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127987775] [2022-07-20 22:26:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:02,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:02,427 INFO L87 Difference]: Start difference. First operand 443 states and 608 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:02,475 INFO L93 Difference]: Finished difference Result 840 states and 1151 transitions. [2022-07-20 22:26:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:02,478 INFO L225 Difference]: With dead ends: 840 [2022-07-20 22:26:02,478 INFO L226 Difference]: Without dead ends: 524 [2022-07-20 22:26:02,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:02,479 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 75 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:02,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 426 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-07-20 22:26:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 448. [2022-07-20 22:26:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 419 states have (on average 1.3150357995226731) internal successors, (551), 420 states have internal predecessors, (551), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 25 states have call predecessors, (28), 22 states have call successors, (28) [2022-07-20 22:26:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 603 transitions. [2022-07-20 22:26:02,493 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 603 transitions. Word has length 48 [2022-07-20 22:26:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:02,493 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 603 transitions. [2022-07-20 22:26:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 603 transitions. [2022-07-20 22:26:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:02,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:02,494 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:02,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:26:02,494 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1326392695, now seen corresponding path program 1 times [2022-07-20 22:26:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:02,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477314529] [2022-07-20 22:26:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:02,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477314529] [2022-07-20 22:26:02,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477314529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:02,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:02,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:26:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661716892] [2022-07-20 22:26:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:02,567 INFO L87 Difference]: Start difference. First operand 448 states and 603 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:02,721 INFO L93 Difference]: Finished difference Result 622 states and 832 transitions. [2022-07-20 22:26:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-07-20 22:26:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:02,724 INFO L225 Difference]: With dead ends: 622 [2022-07-20 22:26:02,724 INFO L226 Difference]: Without dead ends: 533 [2022-07-20 22:26:02,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:26:02,725 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 125 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:02,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1417 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-20 22:26:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 445. [2022-07-20 22:26:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 416 states have (on average 1.3173076923076923) internal successors, (548), 418 states have internal predecessors, (548), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2022-07-20 22:26:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 598 transitions. [2022-07-20 22:26:02,737 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 598 transitions. Word has length 48 [2022-07-20 22:26:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:02,738 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 598 transitions. [2022-07-20 22:26:02,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 598 transitions. [2022-07-20 22:26:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 22:26:02,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:02,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:26:02,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1846534031, now seen corresponding path program 1 times [2022-07-20 22:26:02,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204466118] [2022-07-20 22:26:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204466118] [2022-07-20 22:26:02,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204466118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271132114] [2022-07-20 22:26:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:02,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:02,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:02,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:26:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 22:26:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:02,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271132114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:02,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:02,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-07-20 22:26:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652962279] [2022-07-20 22:26:02,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:02,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:26:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:26:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:02,987 INFO L87 Difference]: Start difference. First operand 445 states and 598 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:03,412 INFO L93 Difference]: Finished difference Result 1186 states and 1594 transitions. [2022-07-20 22:26:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-07-20 22:26:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:03,414 INFO L225 Difference]: With dead ends: 1186 [2022-07-20 22:26:03,414 INFO L226 Difference]: Without dead ends: 808 [2022-07-20 22:26:03,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:26:03,416 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 582 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:03,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 2002 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 22:26:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-20 22:26:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 644. [2022-07-20 22:26:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 603 states have (on average 1.2703150912106136) internal successors, (766), 606 states have internal predecessors, (766), 35 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (42), 36 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-20 22:26:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 843 transitions. [2022-07-20 22:26:03,438 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 843 transitions. Word has length 49 [2022-07-20 22:26:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:03,438 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 843 transitions. [2022-07-20 22:26:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 843 transitions. [2022-07-20 22:26:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:03,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:03,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:03,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:03,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:03,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -763089014, now seen corresponding path program 1 times [2022-07-20 22:26:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:03,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756830526] [2022-07-20 22:26:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:03,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:03,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:03,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:26:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756830526] [2022-07-20 22:26:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756830526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652871821] [2022-07-20 22:26:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:03,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:03,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:03,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:26:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 22:26:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:04,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:04,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652871821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:04,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:04,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-07-20 22:26:04,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613405896] [2022-07-20 22:26:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-07-20 22:26:04,128 INFO L87 Difference]: Start difference. First operand 644 states and 843 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:04,320 INFO L93 Difference]: Finished difference Result 842 states and 1113 transitions. [2022-07-20 22:26:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:04,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-20 22:26:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:04,323 INFO L225 Difference]: With dead ends: 842 [2022-07-20 22:26:04,323 INFO L226 Difference]: Without dead ends: 823 [2022-07-20 22:26:04,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-20 22:26:04,324 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 289 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:04,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1006 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-20 22:26:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 673. [2022-07-20 22:26:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 630 states have (on average 1.265079365079365) internal successors, (797), 634 states have internal predecessors, (797), 37 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2022-07-20 22:26:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 878 transitions. [2022-07-20 22:26:04,345 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 878 transitions. Word has length 50 [2022-07-20 22:26:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:04,345 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 878 transitions. [2022-07-20 22:26:04,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 878 transitions. [2022-07-20 22:26:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 22:26:04,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:04,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:04,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:04,562 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,SelfDestructingSolverStorable14 [2022-07-20 22:26:04,563 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1851976375, now seen corresponding path program 1 times [2022-07-20 22:26:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:04,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379759343] [2022-07-20 22:26:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:04,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379759343] [2022-07-20 22:26:04,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379759343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:04,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:04,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975362025] [2022-07-20 22:26:04,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:04,595 INFO L87 Difference]: Start difference. First operand 673 states and 878 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:04,675 INFO L93 Difference]: Finished difference Result 726 states and 951 transitions. [2022-07-20 22:26:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-20 22:26:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:04,677 INFO L225 Difference]: With dead ends: 726 [2022-07-20 22:26:04,677 INFO L226 Difference]: Without dead ends: 724 [2022-07-20 22:26:04,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:04,678 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 78 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:04,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 841 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-20 22:26:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 682. [2022-07-20 22:26:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 635 states have (on average 1.262992125984252) internal successors, (802), 642 states have internal predecessors, (802), 40 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (47), 38 states have call predecessors, (47), 37 states have call successors, (47) [2022-07-20 22:26:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 889 transitions. [2022-07-20 22:26:04,700 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 889 transitions. Word has length 51 [2022-07-20 22:26:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:04,700 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 889 transitions. [2022-07-20 22:26:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 889 transitions. [2022-07-20 22:26:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:26:04,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:04,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:04,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:26:04,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 609056934, now seen corresponding path program 1 times [2022-07-20 22:26:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753433322] [2022-07-20 22:26:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:04,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753433322] [2022-07-20 22:26:04,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753433322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:04,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521614093] [2022-07-20 22:26:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:04,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:04,725 INFO L87 Difference]: Start difference. First operand 682 states and 889 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:04,761 INFO L93 Difference]: Finished difference Result 699 states and 912 transitions. [2022-07-20 22:26:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-20 22:26:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:04,763 INFO L225 Difference]: With dead ends: 699 [2022-07-20 22:26:04,763 INFO L226 Difference]: Without dead ends: 673 [2022-07-20 22:26:04,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:04,764 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:04,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 516 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-20 22:26:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 567. [2022-07-20 22:26:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 525 states have (on average 1.2704761904761905) internal successors, (667), 531 states have internal predecessors, (667), 35 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (42), 33 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-20 22:26:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 744 transitions. [2022-07-20 22:26:04,779 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 744 transitions. Word has length 52 [2022-07-20 22:26:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:04,780 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 744 transitions. [2022-07-20 22:26:04,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 744 transitions. [2022-07-20 22:26:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 22:26:04,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:04,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:26:04,781 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -616078268, now seen corresponding path program 1 times [2022-07-20 22:26:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131122086] [2022-07-20 22:26:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 22:26:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131122086] [2022-07-20 22:26:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131122086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:04,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:04,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76532274] [2022-07-20 22:26:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:04,848 INFO L87 Difference]: Start difference. First operand 567 states and 744 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:05,032 INFO L93 Difference]: Finished difference Result 1253 states and 1665 transitions. [2022-07-20 22:26:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:05,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-20 22:26:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:05,035 INFO L225 Difference]: With dead ends: 1253 [2022-07-20 22:26:05,035 INFO L226 Difference]: Without dead ends: 1047 [2022-07-20 22:26:05,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:05,036 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 186 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:05,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1411 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-07-20 22:26:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 916. [2022-07-20 22:26:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 856 states have (on average 1.2593457943925233) internal successors, (1078), 863 states have internal predecessors, (1078), 53 states have call successors, (53), 4 states have call predecessors, (53), 6 states have return successors, (60), 52 states have call predecessors, (60), 50 states have call successors, (60) [2022-07-20 22:26:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1191 transitions. [2022-07-20 22:26:05,065 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1191 transitions. Word has length 57 [2022-07-20 22:26:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:05,065 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1191 transitions. [2022-07-20 22:26:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1191 transitions. [2022-07-20 22:26:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:05,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:05,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:26:05,067 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2036483645, now seen corresponding path program 1 times [2022-07-20 22:26:05,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096300866] [2022-07-20 22:26:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:05,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:05,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096300866] [2022-07-20 22:26:05,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096300866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:05,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94163238] [2022-07-20 22:26:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:05,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:05,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:05,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:05,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:26:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:26:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:05,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94163238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:05,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:05,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-20 22:26:05,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987417789] [2022-07-20 22:26:05,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:05,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:26:05,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:26:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:05,258 INFO L87 Difference]: Start difference. First operand 916 states and 1191 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:05,502 INFO L93 Difference]: Finished difference Result 1645 states and 2145 transitions. [2022-07-20 22:26:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-20 22:26:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:05,507 INFO L225 Difference]: With dead ends: 1645 [2022-07-20 22:26:05,507 INFO L226 Difference]: Without dead ends: 1543 [2022-07-20 22:26:05,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:05,508 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 193 mSDsluCounter, 2621 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:05,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 2919 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-07-20 22:26:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 928. [2022-07-20 22:26:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 868 states have (on average 1.2580645161290323) internal successors, (1092), 875 states have internal predecessors, (1092), 53 states have call successors, (53), 4 states have call predecessors, (53), 6 states have return successors, (60), 52 states have call predecessors, (60), 50 states have call successors, (60) [2022-07-20 22:26:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1205 transitions. [2022-07-20 22:26:05,539 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1205 transitions. Word has length 58 [2022-07-20 22:26:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:05,539 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1205 transitions. [2022-07-20 22:26:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1205 transitions. [2022-07-20 22:26:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:05,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:05,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:05,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:05,755 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2124470145, now seen corresponding path program 1 times [2022-07-20 22:26:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016023338] [2022-07-20 22:26:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:05,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016023338] [2022-07-20 22:26:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016023338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750597497] [2022-07-20 22:26:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:05,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:05,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:05,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:26:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750597497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:06,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:06,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-20 22:26:06,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930398270] [2022-07-20 22:26:06,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:06,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 22:26:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 22:26:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:26:06,004 INFO L87 Difference]: Start difference. First operand 928 states and 1205 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:06,261 INFO L93 Difference]: Finished difference Result 2168 states and 2878 transitions. [2022-07-20 22:26:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:26:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-20 22:26:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:06,266 INFO L225 Difference]: With dead ends: 2168 [2022-07-20 22:26:06,266 INFO L226 Difference]: Without dead ends: 2046 [2022-07-20 22:26:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-20 22:26:06,267 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 292 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:06,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2375 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-20 22:26:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 908. [2022-07-20 22:26:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 849 states have (on average 1.2614840989399294) internal successors, (1071), 858 states have internal predecessors, (1071), 52 states have call successors, (52), 4 states have call predecessors, (52), 6 states have return successors, (56), 49 states have call predecessors, (56), 49 states have call successors, (56) [2022-07-20 22:26:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1179 transitions. [2022-07-20 22:26:06,303 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1179 transitions. Word has length 58 [2022-07-20 22:26:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:06,303 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1179 transitions. [2022-07-20 22:26:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1179 transitions. [2022-07-20 22:26:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:06,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:06,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:06,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:06,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:06,514 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:06,514 INFO L85 PathProgramCache]: Analyzing trace with hash 581962179, now seen corresponding path program 1 times [2022-07-20 22:26:06,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:06,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068423633] [2022-07-20 22:26:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:06,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068423633] [2022-07-20 22:26:06,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068423633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:06,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382951762] [2022-07-20 22:26:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:06,553 INFO L87 Difference]: Start difference. First operand 908 states and 1179 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:06,649 INFO L93 Difference]: Finished difference Result 958 states and 1239 transitions. [2022-07-20 22:26:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-07-20 22:26:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:06,652 INFO L225 Difference]: With dead ends: 958 [2022-07-20 22:26:06,652 INFO L226 Difference]: Without dead ends: 752 [2022-07-20 22:26:06,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:06,652 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 44 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:06,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 869 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-20 22:26:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2022-07-20 22:26:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 692 states have (on average 1.2658959537572254) internal successors, (876), 702 states have internal predecessors, (876), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (46), 41 states have call predecessors, (46), 43 states have call successors, (46) [2022-07-20 22:26:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 968 transitions. [2022-07-20 22:26:06,684 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 968 transitions. Word has length 58 [2022-07-20 22:26:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:06,684 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 968 transitions. [2022-07-20 22:26:06,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 968 transitions. [2022-07-20 22:26:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 22:26:06,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:06,685 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:06,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:26:06,686 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash -751105251, now seen corresponding path program 1 times [2022-07-20 22:26:06,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:06,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882724981] [2022-07-20 22:26:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:06,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 22:26:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882724981] [2022-07-20 22:26:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882724981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:06,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176350886] [2022-07-20 22:26:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:06,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:06,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:06,706 INFO L87 Difference]: Start difference. First operand 744 states and 968 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:06,766 INFO L93 Difference]: Finished difference Result 1373 states and 1800 transitions. [2022-07-20 22:26:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-20 22:26:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:06,770 INFO L225 Difference]: With dead ends: 1373 [2022-07-20 22:26:06,770 INFO L226 Difference]: Without dead ends: 764 [2022-07-20 22:26:06,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:06,771 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 55 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:06,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 355 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-20 22:26:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 745. [2022-07-20 22:26:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 693 states have (on average 1.2655122655122655) internal successors, (877), 703 states have internal predecessors, (877), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (46), 41 states have call predecessors, (46), 43 states have call successors, (46) [2022-07-20 22:26:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 969 transitions. [2022-07-20 22:26:06,792 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 969 transitions. Word has length 59 [2022-07-20 22:26:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:06,793 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 969 transitions. [2022-07-20 22:26:06,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 969 transitions. [2022-07-20 22:26:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:26:06,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:06,794 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:26:06,794 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -936842692, now seen corresponding path program 1 times [2022-07-20 22:26:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:06,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218516721] [2022-07-20 22:26:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218516721] [2022-07-20 22:26:06,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218516721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482324000] [2022-07-20 22:26:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:06,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:06,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:06,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:26:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 22:26:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:07,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482324000] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:07,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:07,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 26 [2022-07-20 22:26:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187307627] [2022-07-20 22:26:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:26:07,530 INFO L87 Difference]: Start difference. First operand 745 states and 969 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:07,904 INFO L93 Difference]: Finished difference Result 1182 states and 1539 transitions. [2022-07-20 22:26:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:26:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-07-20 22:26:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:07,908 INFO L225 Difference]: With dead ends: 1182 [2022-07-20 22:26:07,908 INFO L226 Difference]: Without dead ends: 1147 [2022-07-20 22:26:07,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 22:26:07,908 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 240 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:07,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1768 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-20 22:26:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1000. [2022-07-20 22:26:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 930 states have (on average 1.270967741935484) internal successors, (1182), 941 states have internal predecessors, (1182), 63 states have call successors, (63), 4 states have call predecessors, (63), 6 states have return successors, (66), 59 states have call predecessors, (66), 60 states have call successors, (66) [2022-07-20 22:26:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1311 transitions. [2022-07-20 22:26:07,944 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1311 transitions. Word has length 60 [2022-07-20 22:26:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:07,944 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1311 transitions. [2022-07-20 22:26:07,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1311 transitions. [2022-07-20 22:26:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:07,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:07,945 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:07,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 22:26:08,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 778111170, now seen corresponding path program 1 times [2022-07-20 22:26:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071082241] [2022-07-20 22:26:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:08,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:08,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071082241] [2022-07-20 22:26:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071082241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:08,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265025723] [2022-07-20 22:26:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:08,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:08,204 INFO L87 Difference]: Start difference. First operand 1000 states and 1311 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:08,285 INFO L93 Difference]: Finished difference Result 1038 states and 1359 transitions. [2022-07-20 22:26:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-20 22:26:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:08,288 INFO L225 Difference]: With dead ends: 1038 [2022-07-20 22:26:08,288 INFO L226 Difference]: Without dead ends: 1034 [2022-07-20 22:26:08,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:08,289 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 63 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:08,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 828 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-07-20 22:26:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 995. [2022-07-20 22:26:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 924 states have (on average 1.2705627705627707) internal successors, (1174), 937 states have internal predecessors, (1174), 63 states have call successors, (63), 5 states have call predecessors, (63), 7 states have return successors, (66), 57 states have call predecessors, (66), 60 states have call successors, (66) [2022-07-20 22:26:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1303 transitions. [2022-07-20 22:26:08,342 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1303 transitions. Word has length 62 [2022-07-20 22:26:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:08,342 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1303 transitions. [2022-07-20 22:26:08,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1303 transitions. [2022-07-20 22:26:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:08,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:08,344 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:26:08,344 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash 835369472, now seen corresponding path program 1 times [2022-07-20 22:26:08,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:08,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936694227] [2022-07-20 22:26:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:08,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936694227] [2022-07-20 22:26:08,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936694227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:08,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:08,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821746373] [2022-07-20 22:26:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:08,393 INFO L87 Difference]: Start difference. First operand 995 states and 1303 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:08,472 INFO L93 Difference]: Finished difference Result 1028 states and 1344 transitions. [2022-07-20 22:26:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-20 22:26:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:08,475 INFO L225 Difference]: With dead ends: 1028 [2022-07-20 22:26:08,475 INFO L226 Difference]: Without dead ends: 1014 [2022-07-20 22:26:08,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:08,476 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 824 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-20 22:26:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 980. [2022-07-20 22:26:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 912 states have (on average 1.2653508771929824) internal successors, (1154), 923 states have internal predecessors, (1154), 60 states have call successors, (60), 5 states have call predecessors, (60), 7 states have return successors, (62), 56 states have call predecessors, (62), 56 states have call successors, (62) [2022-07-20 22:26:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1276 transitions. [2022-07-20 22:26:08,516 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1276 transitions. Word has length 62 [2022-07-20 22:26:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:08,516 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1276 transitions. [2022-07-20 22:26:08,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1276 transitions. [2022-07-20 22:26:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:08,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:08,520 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:08,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:26:08,520 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1459442409, now seen corresponding path program 1 times [2022-07-20 22:26:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:08,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193649603] [2022-07-20 22:26:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-20 22:26:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193649603] [2022-07-20 22:26:08,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193649603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71123628] [2022-07-20 22:26:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:08,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:08,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:26:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 22:26:08,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:08,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:08,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71123628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:08,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:08,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-20 22:26:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663462480] [2022-07-20 22:26:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:08,805 INFO L87 Difference]: Start difference. First operand 980 states and 1276 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:08,942 INFO L93 Difference]: Finished difference Result 1229 states and 1614 transitions. [2022-07-20 22:26:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:08,942 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-07-20 22:26:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:08,945 INFO L225 Difference]: With dead ends: 1229 [2022-07-20 22:26:08,945 INFO L226 Difference]: Without dead ends: 1213 [2022-07-20 22:26:08,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:08,947 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 220 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:08,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 503 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-20 22:26:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 980. [2022-07-20 22:26:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 912 states have (on average 1.263157894736842) internal successors, (1152), 923 states have internal predecessors, (1152), 60 states have call successors, (60), 5 states have call predecessors, (60), 7 states have return successors, (62), 56 states have call predecessors, (62), 56 states have call successors, (62) [2022-07-20 22:26:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1274 transitions. [2022-07-20 22:26:08,986 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1274 transitions. Word has length 62 [2022-07-20 22:26:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:08,986 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1274 transitions. [2022-07-20 22:26:08,986 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1274 transitions. [2022-07-20 22:26:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:08,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:08,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:09,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 22:26:09,195 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1430736848, now seen corresponding path program 1 times [2022-07-20 22:26:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424661133] [2022-07-20 22:26:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:09,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424661133] [2022-07-20 22:26:09,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424661133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:09,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:09,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-20 22:26:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190691779] [2022-07-20 22:26:09,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:26:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:26:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:26:09,295 INFO L87 Difference]: Start difference. First operand 980 states and 1274 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:09,549 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-07-20 22:26:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 22:26:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-20 22:26:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:09,553 INFO L225 Difference]: With dead ends: 1566 [2022-07-20 22:26:09,553 INFO L226 Difference]: Without dead ends: 1112 [2022-07-20 22:26:09,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:09,554 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 355 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:09,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1264 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-07-20 22:26:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1055. [2022-07-20 22:26:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 987 states have (on average 1.2401215805471124) internal successors, (1224), 998 states have internal predecessors, (1224), 60 states have call successors, (60), 5 states have call predecessors, (60), 7 states have return successors, (62), 56 states have call predecessors, (62), 56 states have call successors, (62) [2022-07-20 22:26:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1346 transitions. [2022-07-20 22:26:09,590 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1346 transitions. Word has length 62 [2022-07-20 22:26:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:09,590 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1346 transitions. [2022-07-20 22:26:09,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1346 transitions. [2022-07-20 22:26:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:09,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:09,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:09,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:26:09,592 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1428889806, now seen corresponding path program 1 times [2022-07-20 22:26:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128257613] [2022-07-20 22:26:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:09,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128257613] [2022-07-20 22:26:09,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128257613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:09,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:09,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 22:26:09,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896931117] [2022-07-20 22:26:09,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:26:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:26:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:09,756 INFO L87 Difference]: Start difference. First operand 1055 states and 1346 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:10,226 INFO L93 Difference]: Finished difference Result 1118 states and 1421 transitions. [2022-07-20 22:26:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-20 22:26:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:10,230 INFO L225 Difference]: With dead ends: 1118 [2022-07-20 22:26:10,230 INFO L226 Difference]: Without dead ends: 1116 [2022-07-20 22:26:10,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:26:10,231 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 386 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:10,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1969 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 22:26:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-20 22:26:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1065. [2022-07-20 22:26:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 995 states have (on average 1.2381909547738694) internal successors, (1232), 1007 states have internal predecessors, (1232), 61 states have call successors, (61), 6 states have call predecessors, (61), 8 states have return successors, (63), 56 states have call predecessors, (63), 57 states have call successors, (63) [2022-07-20 22:26:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1356 transitions. [2022-07-20 22:26:10,265 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1356 transitions. Word has length 62 [2022-07-20 22:26:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:10,265 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1356 transitions. [2022-07-20 22:26:10,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1356 transitions. [2022-07-20 22:26:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:10,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:10,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:26:10,266 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -900886980, now seen corresponding path program 1 times [2022-07-20 22:26:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:10,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259802381] [2022-07-20 22:26:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:10,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:10,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259802381] [2022-07-20 22:26:10,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259802381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409979785] [2022-07-20 22:26:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:10,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:10,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:10,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:10,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:26:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:10,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409979785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:10,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:10,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-20 22:26:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372687821] [2022-07-20 22:26:10,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:10,482 INFO L87 Difference]: Start difference. First operand 1065 states and 1356 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:10,773 INFO L93 Difference]: Finished difference Result 3170 states and 4096 transitions. [2022-07-20 22:26:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:26:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:10,779 INFO L225 Difference]: With dead ends: 3170 [2022-07-20 22:26:10,779 INFO L226 Difference]: Without dead ends: 2732 [2022-07-20 22:26:10,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:10,781 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 302 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:10,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1577 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2022-07-20 22:26:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1170. [2022-07-20 22:26:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1098 states have (on average 1.2322404371584699) internal successors, (1353), 1108 states have internal predecessors, (1353), 62 states have call successors, (62), 6 states have call predecessors, (62), 9 states have return successors, (70), 60 states have call predecessors, (70), 58 states have call successors, (70) [2022-07-20 22:26:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1485 transitions. [2022-07-20 22:26:10,832 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1485 transitions. Word has length 65 [2022-07-20 22:26:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:10,832 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1485 transitions. [2022-07-20 22:26:10,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1485 transitions. [2022-07-20 22:26:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:10,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:10,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:10,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:11,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 22:26:11,051 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1705136574, now seen corresponding path program 1 times [2022-07-20 22:26:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:11,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44930217] [2022-07-20 22:26:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:11,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:11,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44930217] [2022-07-20 22:26:11,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44930217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619611983] [2022-07-20 22:26:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:11,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:11,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:26:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:26:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:11,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619611983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:11,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:11,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-07-20 22:26:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650872742] [2022-07-20 22:26:11,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 22:26:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 22:26:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:11,341 INFO L87 Difference]: Start difference. First operand 1170 states and 1485 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:11,942 INFO L93 Difference]: Finished difference Result 3318 states and 4313 transitions. [2022-07-20 22:26:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 22:26:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-20 22:26:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:11,955 INFO L225 Difference]: With dead ends: 3318 [2022-07-20 22:26:11,955 INFO L226 Difference]: Without dead ends: 2835 [2022-07-20 22:26:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 22:26:11,957 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 742 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:11,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1149 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 22:26:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-20 22:26:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1230. [2022-07-20 22:26:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1156 states have (on average 1.2283737024221453) internal successors, (1420), 1164 states have internal predecessors, (1420), 63 states have call successors, (63), 6 states have call predecessors, (63), 10 states have return successors, (79), 64 states have call predecessors, (79), 59 states have call successors, (79) [2022-07-20 22:26:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1562 transitions. [2022-07-20 22:26:12,026 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1562 transitions. Word has length 65 [2022-07-20 22:26:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:12,027 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1562 transitions. [2022-07-20 22:26:12,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1562 transitions. [2022-07-20 22:26:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:12,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:12,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:12,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 22:26:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:12,243 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -766873474, now seen corresponding path program 1 times [2022-07-20 22:26:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:12,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453982061] [2022-07-20 22:26:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:12,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453982061] [2022-07-20 22:26:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453982061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489918559] [2022-07-20 22:26:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:12,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:12,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 22:26:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:26:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:12,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489918559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:12,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:12,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-20 22:26:12,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577105527] [2022-07-20 22:26:12,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:12,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:26:12,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:26:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:12,475 INFO L87 Difference]: Start difference. First operand 1230 states and 1562 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:12,899 INFO L93 Difference]: Finished difference Result 3599 states and 4776 transitions. [2022-07-20 22:26:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 22:26:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:12,906 INFO L225 Difference]: With dead ends: 3599 [2022-07-20 22:26:12,906 INFO L226 Difference]: Without dead ends: 3274 [2022-07-20 22:26:12,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-20 22:26:12,908 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 363 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:12,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2298 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-07-20 22:26:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1356. [2022-07-20 22:26:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1282 states have (on average 1.21996879875195) internal successors, (1564), 1290 states have internal predecessors, (1564), 63 states have call successors, (63), 6 states have call predecessors, (63), 10 states have return successors, (79), 64 states have call predecessors, (79), 59 states have call successors, (79) [2022-07-20 22:26:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1706 transitions. [2022-07-20 22:26:12,959 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1706 transitions. Word has length 65 [2022-07-20 22:26:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:12,959 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1706 transitions. [2022-07-20 22:26:12,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1706 transitions. [2022-07-20 22:26:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:12,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:12,961 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:12,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:13,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:13,175 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1161747526, now seen corresponding path program 1 times [2022-07-20 22:26:13,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735676281] [2022-07-20 22:26:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:13,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:13,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:13,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:13,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735676281] [2022-07-20 22:26:13,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735676281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202786749] [2022-07-20 22:26:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:13,226 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:13,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 22:26:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:26:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:13,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:13,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202786749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:13,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:13,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-20 22:26:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010629093] [2022-07-20 22:26:13,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:13,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 22:26:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 22:26:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:13,505 INFO L87 Difference]: Start difference. First operand 1356 states and 1706 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:14,311 INFO L93 Difference]: Finished difference Result 4186 states and 5525 transitions. [2022-07-20 22:26:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 22:26:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-20 22:26:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:14,317 INFO L225 Difference]: With dead ends: 4186 [2022-07-20 22:26:14,318 INFO L226 Difference]: Without dead ends: 3598 [2022-07-20 22:26:14,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 22:26:14,320 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 986 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:14,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 1746 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:26:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-20 22:26:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 1272. [2022-07-20 22:26:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1199 states have (on average 1.224353628023353) internal successors, (1468), 1210 states have internal predecessors, (1468), 62 states have call successors, (62), 6 states have call predecessors, (62), 10 states have return successors, (73), 60 states have call predecessors, (73), 58 states have call successors, (73) [2022-07-20 22:26:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1603 transitions. [2022-07-20 22:26:14,384 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1603 transitions. Word has length 65 [2022-07-20 22:26:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:14,384 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1603 transitions. [2022-07-20 22:26:14,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1603 transitions. [2022-07-20 22:26:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:14,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:14,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:14,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 22:26:14,599 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1795236595, now seen corresponding path program 1 times [2022-07-20 22:26:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996728686] [2022-07-20 22:26:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:14,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 22:26:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:14,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996728686] [2022-07-20 22:26:14,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996728686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:14,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718067461] [2022-07-20 22:26:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:14,646 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:14,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 22:26:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:26:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:14,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:14,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718067461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:14,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-20 22:26:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930048745] [2022-07-20 22:26:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:14,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:14,715 INFO L87 Difference]: Start difference. First operand 1272 states and 1603 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:14,802 INFO L93 Difference]: Finished difference Result 2435 states and 3101 transitions. [2022-07-20 22:26:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:14,804 INFO L225 Difference]: With dead ends: 2435 [2022-07-20 22:26:14,805 INFO L226 Difference]: Without dead ends: 1306 [2022-07-20 22:26:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:14,806 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 27 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:14,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 382 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-07-20 22:26:14,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1281. [2022-07-20 22:26:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1208 states have (on average 1.2251655629139073) internal successors, (1480), 1219 states have internal predecessors, (1480), 62 states have call successors, (62), 6 states have call predecessors, (62), 10 states have return successors, (73), 60 states have call predecessors, (73), 58 states have call successors, (73) [2022-07-20 22:26:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1615 transitions. [2022-07-20 22:26:14,849 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1615 transitions. Word has length 65 [2022-07-20 22:26:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:14,849 INFO L495 AbstractCegarLoop]: Abstraction has 1281 states and 1615 transitions. [2022-07-20 22:26:14,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1615 transitions. [2022-07-20 22:26:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:14,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:14,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:14,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:15,070 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1045451834, now seen corresponding path program 2 times [2022-07-20 22:26:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:15,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806673327] [2022-07-20 22:26:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:15,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:15,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806673327] [2022-07-20 22:26:15,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806673327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:15,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:15,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:26:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408951865] [2022-07-20 22:26:15,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:15,135 INFO L87 Difference]: Start difference. First operand 1281 states and 1615 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:15,435 INFO L93 Difference]: Finished difference Result 2456 states and 3190 transitions. [2022-07-20 22:26:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:26:15,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-20 22:26:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:15,439 INFO L225 Difference]: With dead ends: 2456 [2022-07-20 22:26:15,439 INFO L226 Difference]: Without dead ends: 2247 [2022-07-20 22:26:15,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:15,440 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 266 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:15,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1970 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-07-20 22:26:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1434. [2022-07-20 22:26:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1361 states have (on average 1.2174871418074944) internal successors, (1657), 1369 states have internal predecessors, (1657), 62 states have call successors, (62), 6 states have call predecessors, (62), 10 states have return successors, (73), 63 states have call predecessors, (73), 58 states have call successors, (73) [2022-07-20 22:26:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1792 transitions. [2022-07-20 22:26:15,501 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1792 transitions. Word has length 65 [2022-07-20 22:26:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:15,502 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1792 transitions. [2022-07-20 22:26:15,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1792 transitions. [2022-07-20 22:26:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:15,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:15,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:15,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:26:15,504 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash 650577782, now seen corresponding path program 1 times [2022-07-20 22:26:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:15,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049599675] [2022-07-20 22:26:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049599675] [2022-07-20 22:26:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049599675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:15,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:15,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:26:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690502702] [2022-07-20 22:26:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:15,549 INFO L87 Difference]: Start difference. First operand 1434 states and 1792 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:15,819 INFO L93 Difference]: Finished difference Result 2768 states and 3578 transitions. [2022-07-20 22:26:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-20 22:26:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:15,823 INFO L225 Difference]: With dead ends: 2768 [2022-07-20 22:26:15,823 INFO L226 Difference]: Without dead ends: 2306 [2022-07-20 22:26:15,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:15,824 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 309 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:15,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 948 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-07-20 22:26:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1432. [2022-07-20 22:26:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1359 states have (on average 1.216335540838852) internal successors, (1653), 1365 states have internal predecessors, (1653), 62 states have call successors, (62), 6 states have call predecessors, (62), 10 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-07-20 22:26:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1787 transitions. [2022-07-20 22:26:15,878 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1787 transitions. Word has length 65 [2022-07-20 22:26:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:15,879 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 1787 transitions. [2022-07-20 22:26:15,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1787 transitions. [2022-07-20 22:26:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:26:15,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:15,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:15,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:26:15,881 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash -825997882, now seen corresponding path program 1 times [2022-07-20 22:26:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041470676] [2022-07-20 22:26:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-20 22:26:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041470676] [2022-07-20 22:26:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041470676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016835754] [2022-07-20 22:26:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:15,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:15,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:15,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 22:26:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:15,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:15,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016835754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:15,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:15,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-20 22:26:15,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76959334] [2022-07-20 22:26:15,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:15,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:15,958 INFO L87 Difference]: Start difference. First operand 1432 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:16,021 INFO L93 Difference]: Finished difference Result 2428 states and 3037 transitions. [2022-07-20 22:26:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-07-20 22:26:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:16,025 INFO L225 Difference]: With dead ends: 2428 [2022-07-20 22:26:16,025 INFO L226 Difference]: Without dead ends: 1443 [2022-07-20 22:26:16,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:16,027 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 14 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:16,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 407 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-07-20 22:26:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2022-07-20 22:26:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1360 states have (on average 1.2169117647058822) internal successors, (1655), 1366 states have internal predecessors, (1655), 62 states have call successors, (62), 6 states have call predecessors, (62), 10 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-07-20 22:26:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1789 transitions. [2022-07-20 22:26:16,072 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1789 transitions. Word has length 66 [2022-07-20 22:26:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:16,073 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1789 transitions. [2022-07-20 22:26:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1789 transitions. [2022-07-20 22:26:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 22:26:16,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:16,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:16,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:16,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:16,292 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2048501975, now seen corresponding path program 1 times [2022-07-20 22:26:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936466901] [2022-07-20 22:26:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:16,312 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:26:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:16,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 22:26:16,356 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:26:16,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:26:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:26:16,360 INFO L356 BasicCegarLoop]: Path program histogram: [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] [2022-07-20 22:26:16,364 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 22:26:16,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:26:16 BoogieIcfgContainer [2022-07-20 22:26:16,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 22:26:16,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 22:26:16,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 22:26:16,397 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 22:26:16,397 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:25:58" (3/4) ... [2022-07-20 22:26:16,399 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-20 22:26:16,399 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 22:26:16,399 INFO L158 Benchmark]: Toolchain (without parser) took 18576.52ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 76.6MB in the beginning and 95.6MB in the end (delta: -19.0MB). Peak memory consumption was 164.5MB. Max. memory is 16.1GB. [2022-07-20 22:26:16,399 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 84.7MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:16,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.92ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 82.3MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 22:26:16,400 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.28ms. Allocated memory is still 111.1MB. Free memory was 82.3MB in the beginning and 79.7MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-20 22:26:16,400 INFO L158 Benchmark]: Boogie Preprocessor took 19.03ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 78.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:16,400 INFO L158 Benchmark]: RCFGBuilder took 425.52ms. Allocated memory is still 111.1MB. Free memory was 78.1MB in the beginning and 58.7MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-20 22:26:16,400 INFO L158 Benchmark]: TraceAbstraction took 17854.56ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 58.1MB in the beginning and 95.6MB in the end (delta: -37.5MB). Peak memory consumption was 148.2MB. Max. memory is 16.1GB. [2022-07-20 22:26:16,400 INFO L158 Benchmark]: Witness Printer took 2.16ms. Allocated memory is still 293.6MB. Free memory is still 95.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:16,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 84.7MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.92ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 82.3MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.28ms. Allocated memory is still 111.1MB. Free memory was 82.3MB in the beginning and 79.7MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.03ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 78.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 425.52ms. Allocated memory is still 111.1MB. Free memory was 78.1MB in the beginning and 58.7MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 17854.56ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 58.1MB in the beginning and 95.6MB in the end (delta: -37.5MB). Peak memory consumption was 148.2MB. Max. memory is 16.1GB. * Witness Printer took 2.16ms. Allocated memory is still 293.6MB. Free memory is still 95.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=-125, eb=127] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L81] return (__retres4); VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, \result=0, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L252] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L30] COND FALSE !(! m) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L58] COND TRUE 1 VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L77] m = m & ~ (1U << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=144115188075855874] [L78] res = m | ((unsigned int ) (e + 128) << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L79] __retres4 = res VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L81] return (__retres4); VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int ) (e + 128) << 24U))=144115188075855874, \result=144115188075855871, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L253] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=144115188075855871, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L81] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int ) (e + 128) << 24U))=50331648, \result=4294967295, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L254] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, zero=0] [L259] COND TRUE a > zero [L260] tmp = 1 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, tmp=1, zero=0] [L264] sa = tmp VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, sa=1, tmp=1, zero=0] [L266] COND FALSE !(b < zero) VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, sa=1, tmp=1, zero=0] [L269] COND TRUE b > zero [L270] tmp___0 = 1 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, sa=1, tmp=1, tmp___0=1, zero=0] [L274] sb = tmp___0 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int ) (e + 128) << 24U)=50331648, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L102] COND FALSE !(! b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L109] ma = a & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L111] ma = ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L112] mb = b & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L114] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=1, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] [L18] reach_error() VAL [\old(cond)=0, cond=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int ) (e + 128) << 24U)=50331648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 106 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.8s, OverallIterations: 37, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8140 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7974 mSDsluCounter, 39287 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 32617 mSDsCounter, 834 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8252 IncrementalHoareTripleChecker+Invalid, 9086 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 834 mSolverCounterUnsat, 6670 mSDtfsCounter, 8252 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2099 GetRequests, 1616 SyntacticMatches, 15 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1434occurred in iteration=34, InterpolantAutomatonStates: 359, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 36 MinimizatonAttempts, 12660 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 2878 NumberOfCodeBlocks, 2878 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 3321 ConstructedInterpolants, 0 QuantifiedInterpolants, 9324 SizeOfPredicates, 88 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 61 InterpolantComputations, 28 PerfectInterpolantSequences, 901/1039 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-20 22:26:16,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:26:18,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:26:18,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:26:18,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:26:18,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:26:18,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:26:18,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:26:18,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:26:18,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:26:18,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:26:18,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:26:18,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:26:18,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:26:18,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:26:18,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:26:18,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:26:18,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:26:18,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:26:18,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:26:18,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:26:18,134 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:26:18,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:26:18,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:26:18,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:26:18,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:26:18,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:26:18,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:26:18,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:26:18,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:26:18,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:26:18,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:26:18,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:26:18,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:26:18,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:26:18,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:26:18,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:26:18,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:26:18,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:26:18,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:26:18,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:26:18,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:26:18,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:26:18,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-20 22:26:18,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:26:18,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:26:18,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:26:18,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:26:18,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:26:18,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:26:18,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:26:18,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:26:18,186 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:26:18,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:26:18,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:26:18,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 22:26:18,188 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 22:26:18,189 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 22:26:18,189 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:26:18,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:26:18,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:26:18,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:26:18,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:26:18,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:26:18,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:26:18,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:18,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:26:18,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:26:18,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:26:18,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 22:26:18,192 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-07-20 22:26:18,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:26:18,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:26:18,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:26:18,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:26:18,457 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:26:18,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-20 22:26:18,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3649bda77/dcdcd5fa834343829450cf76d0eb4ad9/FLAG56d2f8872 [2022-07-20 22:26:18,898 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:26:18,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-20 22:26:18,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3649bda77/dcdcd5fa834343829450cf76d0eb4ad9/FLAG56d2f8872 [2022-07-20 22:26:18,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3649bda77/dcdcd5fa834343829450cf76d0eb4ad9 [2022-07-20 22:26:18,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:26:18,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:26:18,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:18,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:26:18,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:26:18,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:18" (1/1) ... [2022-07-20 22:26:18,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5807f304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:18, skipping insertion in model container [2022-07-20 22:26:18,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:18" (1/1) ... [2022-07-20 22:26:18,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:26:18,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:26:19,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-07-20 22:26:19,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:19,178 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:26:19,186 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-07-20 22:26:19,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:19,224 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:26:19,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19 WrapperNode [2022-07-20 22:26:19,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:19,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:19,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:26:19,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:26:19,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,266 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2022-07-20 22:26:19,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:19,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:26:19,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:26:19,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:26:19,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:26:19,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:26:19,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:26:19,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:26:19,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (1/1) ... [2022-07-20 22:26:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:19,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:26:19,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:26:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:26:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 22:26:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-20 22:26:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-20 22:26:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:26:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:26:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 22:26:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 22:26:19,439 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:26:19,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:26:19,706 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:26:19,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:26:19,715 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 22:26:19,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:19 BoogieIcfgContainer [2022-07-20 22:26:19,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:26:19,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:26:19,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:26:19,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:26:19,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:26:18" (1/3) ... [2022-07-20 22:26:19,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d4a773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:19, skipping insertion in model container [2022-07-20 22:26:19,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:19" (2/3) ... [2022-07-20 22:26:19,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d4a773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:19, skipping insertion in model container [2022-07-20 22:26:19,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:19" (3/3) ... [2022-07-20 22:26:19,721 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-07-20 22:26:19,732 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:26:19,732 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:26:19,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:26:19,767 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b1bcb4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f75ef4e [2022-07-20 22:26:19,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:26:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:26:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:26:19,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:19,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:19,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2022-07-20 22:26:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584456729] [2022-07-20 22:26:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:19,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:19,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 22:26:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:19,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:19,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:19,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584456729] [2022-07-20 22:26:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584456729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:19,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:19,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-20 22:26:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640002441] [2022-07-20 22:26:20,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:20,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:20,026 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,115 INFO L93 Difference]: Finished difference Result 194 states and 322 transitions. [2022-07-20 22:26:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-07-20 22:26:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,123 INFO L225 Difference]: With dead ends: 194 [2022-07-20 22:26:20,123 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 22:26:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:20,127 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 62 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 753 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 22:26:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2022-07-20 22:26:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 68 states have internal predecessors, (96), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-20 22:26:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 120 transitions. [2022-07-20 22:26:20,174 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 120 transitions. Word has length 32 [2022-07-20 22:26:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,174 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 120 transitions. [2022-07-20 22:26:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 120 transitions. [2022-07-20 22:26:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:26:20,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,179 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-20 22:26:20,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:20,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 975798983, now seen corresponding path program 1 times [2022-07-20 22:26:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:20,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782008283] [2022-07-20 22:26:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:20,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:20,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 22:26:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:20,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:20,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:20,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782008283] [2022-07-20 22:26:20,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782008283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:20,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083054532] [2022-07-20 22:26:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:20,463 INFO L87 Difference]: Start difference. First operand 80 states and 120 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,539 INFO L93 Difference]: Finished difference Result 169 states and 257 transitions. [2022-07-20 22:26:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-20 22:26:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,544 INFO L225 Difference]: With dead ends: 169 [2022-07-20 22:26:20,544 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 22:26:20,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:20,546 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 448 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 22:26:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-07-20 22:26:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.457142857142857) internal successors, (153), 106 states have internal predecessors, (153), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-20 22:26:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 185 transitions. [2022-07-20 22:26:20,573 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 185 transitions. Word has length 36 [2022-07-20 22:26:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,573 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 185 transitions. [2022-07-20 22:26:20,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 185 transitions. [2022-07-20 22:26:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:26:20,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,575 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-20 22:26:20,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:20,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1655857353, now seen corresponding path program 1 times [2022-07-20 22:26:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:20,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766542382] [2022-07-20 22:26:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:20,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:20,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 22:26:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 22:26:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:20,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:20,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766542382] [2022-07-20 22:26:20,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766542382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984356020] [2022-07-20 22:26:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:20,869 INFO L87 Difference]: Start difference. First operand 123 states and 185 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,951 INFO L93 Difference]: Finished difference Result 180 states and 272 transitions. [2022-07-20 22:26:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-20 22:26:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,972 INFO L225 Difference]: With dead ends: 180 [2022-07-20 22:26:20,972 INFO L226 Difference]: Without dead ends: 141 [2022-07-20 22:26:20,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:20,978 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 105 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 533 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-20 22:26:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2022-07-20 22:26:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 99 states have internal predecessors, (141), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (16), 14 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-20 22:26:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2022-07-20 22:26:20,998 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 36 [2022-07-20 22:26:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,999 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2022-07-20 22:26:20,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2022-07-20 22:26:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:26:21,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:21,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 22:26:21,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-20 22:26:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:21,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -371678158, now seen corresponding path program 1 times [2022-07-20 22:26:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247990280] [2022-07-20 22:26:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:21,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:21,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:21,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 22:26:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:26:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:21,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247990280] [2022-07-20 22:26:21,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247990280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:21,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:21,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 22:26:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332064485] [2022-07-20 22:26:21,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:21,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:21,371 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:21,520 INFO L93 Difference]: Finished difference Result 312 states and 474 transitions. [2022-07-20 22:26:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-07-20 22:26:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:21,523 INFO L225 Difference]: With dead ends: 312 [2022-07-20 22:26:21,523 INFO L226 Difference]: Without dead ends: 237 [2022-07-20 22:26:21,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:26:21,531 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 193 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:21,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 642 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-20 22:26:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2022-07-20 22:26:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-20 22:26:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2022-07-20 22:26:21,549 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2022-07-20 22:26:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:21,549 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2022-07-20 22:26:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2022-07-20 22:26:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:21,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:21,551 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:21,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:21,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2022-07-20 22:26:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532416837] [2022-07-20 22:26:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:21,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:21,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 22:26:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:21,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:21,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:21,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:21,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532416837] [2022-07-20 22:26:21,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532416837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:21,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:21,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:21,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8118972] [2022-07-20 22:26:21,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:21,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:21,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:21,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:21,820 INFO L87 Difference]: Start difference. First operand 178 states and 258 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:21,848 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-07-20 22:26:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-20 22:26:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:21,850 INFO L225 Difference]: With dead ends: 331 [2022-07-20 22:26:21,850 INFO L226 Difference]: Without dead ends: 265 [2022-07-20 22:26:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:21,852 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 68 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 325 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-20 22:26:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-07-20 22:26:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 209 states have (on average 1.3444976076555024) internal successors, (281), 208 states have internal predecessors, (281), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-20 22:26:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 327 transitions. [2022-07-20 22:26:21,870 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 327 transitions. Word has length 43 [2022-07-20 22:26:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:21,870 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 327 transitions. [2022-07-20 22:26:21,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 327 transitions. [2022-07-20 22:26:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:21,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:21,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 22:26:21,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-20 22:26:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:22,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1847325628, now seen corresponding path program 1 times [2022-07-20 22:26:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:22,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005504936] [2022-07-20 22:26:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:22,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:22,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:22,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:22,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 22:26:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:22,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:22,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:22,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005504936] [2022-07-20 22:26:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005504936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:22,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:22,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:22,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002164608] [2022-07-20 22:26:22,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:22,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:22,147 INFO L87 Difference]: Start difference. First operand 233 states and 327 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:22,191 INFO L93 Difference]: Finished difference Result 408 states and 569 transitions. [2022-07-20 22:26:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-20 22:26:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:22,195 INFO L225 Difference]: With dead ends: 408 [2022-07-20 22:26:22,195 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 22:26:22,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:22,196 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 25 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:22,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 247 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 22:26:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-07-20 22:26:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 148 states have (on average 1.304054054054054) internal successors, (193), 150 states have internal predecessors, (193), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-20 22:26:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 224 transitions. [2022-07-20 22:26:22,216 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 224 transitions. Word has length 43 [2022-07-20 22:26:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:22,216 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 224 transitions. [2022-07-20 22:26:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 224 transitions. [2022-07-20 22:26:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:22,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:22,218 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:22,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:22,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:22,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2022-07-20 22:26:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:22,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383493587] [2022-07-20 22:26:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:22,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:22,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:22,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 22:26:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:22,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:22,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383493587] [2022-07-20 22:26:22,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383493587] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:22,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-20 22:26:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224945580] [2022-07-20 22:26:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:22,655 INFO L87 Difference]: Start difference. First operand 166 states and 224 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:22,911 INFO L93 Difference]: Finished difference Result 316 states and 455 transitions. [2022-07-20 22:26:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:22,913 INFO L225 Difference]: With dead ends: 316 [2022-07-20 22:26:22,913 INFO L226 Difference]: Without dead ends: 280 [2022-07-20 22:26:22,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:22,914 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 189 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:22,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 502 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-20 22:26:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2022-07-20 22:26:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 182 states have (on average 1.2967032967032968) internal successors, (236), 185 states have internal predecessors, (236), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 275 transitions. [2022-07-20 22:26:22,922 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 275 transitions. Word has length 44 [2022-07-20 22:26:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:22,922 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 275 transitions. [2022-07-20 22:26:22,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 275 transitions. [2022-07-20 22:26:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:22,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:22,923 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:22,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:23,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2022-07-20 22:26:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734284427] [2022-07-20 22:26:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:23,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:23,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:23,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 22:26:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:26:23,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:23,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:23,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734284427] [2022-07-20 22:26:23,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734284427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:23,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:23,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:23,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084826254] [2022-07-20 22:26:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:23,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:23,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:23,189 INFO L87 Difference]: Start difference. First operand 204 states and 275 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:23,209 INFO L93 Difference]: Finished difference Result 211 states and 281 transitions. [2022-07-20 22:26:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:23,211 INFO L225 Difference]: With dead ends: 211 [2022-07-20 22:26:23,211 INFO L226 Difference]: Without dead ends: 204 [2022-07-20 22:26:23,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:23,212 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:23,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 377 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-20 22:26:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-20 22:26:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 185 states have internal predecessors, (233), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 272 transitions. [2022-07-20 22:26:23,218 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 272 transitions. Word has length 44 [2022-07-20 22:26:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:23,218 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 272 transitions. [2022-07-20 22:26:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 272 transitions. [2022-07-20 22:26:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:23,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:23,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:23,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:23,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2022-07-20 22:26:23,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:23,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764261120] [2022-07-20 22:26:23,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:26:23,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:23,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:23,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 22:26:23,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 22:26:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:26:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:26:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:23,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:23,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:23,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764261120] [2022-07-20 22:26:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764261120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:23,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:23,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012624172] [2022-07-20 22:26:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:23,531 INFO L87 Difference]: Start difference. First operand 204 states and 272 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:23,579 INFO L93 Difference]: Finished difference Result 247 states and 333 transitions. [2022-07-20 22:26:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:23,580 INFO L225 Difference]: With dead ends: 247 [2022-07-20 22:26:23,580 INFO L226 Difference]: Without dead ends: 245 [2022-07-20 22:26:23,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:23,581 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 38 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:23,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 593 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-20 22:26:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-20 22:26:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 208. [2022-07-20 22:26:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 188 states have internal predecessors, (236), 17 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-07-20 22:26:23,589 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 44 [2022-07-20 22:26:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:23,589 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-07-20 22:26:23,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-07-20 22:26:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:23,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:23,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:23,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-20 22:26:23,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 54158117, now seen corresponding path program 1 times [2022-07-20 22:26:23,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:23,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832138344] [2022-07-20 22:26:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:23,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:23,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:23,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 22:26:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:26:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:23,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:24,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832138344] [2022-07-20 22:26:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832138344] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:24,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-20 22:26:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482949155] [2022-07-20 22:26:24,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:26:24,038 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:24,137 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-07-20 22:26:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:26:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:24,139 INFO L225 Difference]: With dead ends: 265 [2022-07-20 22:26:24,139 INFO L226 Difference]: Without dead ends: 263 [2022-07-20 22:26:24,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:24,140 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 88 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:24,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 498 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-20 22:26:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 212. [2022-07-20 22:26:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 188 states have (on average 1.2712765957446808) internal successors, (239), 191 states have internal predecessors, (239), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-20 22:26:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2022-07-20 22:26:24,150 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 44 [2022-07-20 22:26:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:24,151 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2022-07-20 22:26:24,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2022-07-20 22:26:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:24,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-20 22:26:24,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2022-07-20 22:26:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878551738] [2022-07-20 22:26:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:24,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:24,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:24,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 22:26:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:24,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:24,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878551738] [2022-07-20 22:26:24,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878551738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:24,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:24,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11933339] [2022-07-20 22:26:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:24,411 INFO L87 Difference]: Start difference. First operand 212 states and 278 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:24,442 INFO L93 Difference]: Finished difference Result 351 states and 473 transitions. [2022-07-20 22:26:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:24,443 INFO L225 Difference]: With dead ends: 351 [2022-07-20 22:26:24,444 INFO L226 Difference]: Without dead ends: 299 [2022-07-20 22:26:24,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:24,444 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 77 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:24,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-20 22:26:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2022-07-20 22:26:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 206 states have (on average 1.2766990291262137) internal successors, (263), 208 states have internal predecessors, (263), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-20 22:26:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2022-07-20 22:26:24,456 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 45 [2022-07-20 22:26:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:24,457 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2022-07-20 22:26:24,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2022-07-20 22:26:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:24,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:24,458 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:24,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:24,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2022-07-20 22:26:24,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:24,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081728382] [2022-07-20 22:26:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:24,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:24,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:24,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 22:26:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:24,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:24,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081728382] [2022-07-20 22:26:24,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081728382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:24,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:24,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101255777] [2022-07-20 22:26:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:24,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:24,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:24,711 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:24,729 INFO L93 Difference]: Finished difference Result 246 states and 320 transitions. [2022-07-20 22:26:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:24,730 INFO L225 Difference]: With dead ends: 246 [2022-07-20 22:26:24,730 INFO L226 Difference]: Without dead ends: 207 [2022-07-20 22:26:24,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:24,731 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:24,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-20 22:26:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-07-20 22:26:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 182 states have (on average 1.2912087912087913) internal successors, (235), 185 states have internal predecessors, (235), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-20 22:26:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2022-07-20 22:26:24,740 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 48 [2022-07-20 22:26:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:24,741 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2022-07-20 22:26:24,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2022-07-20 22:26:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 22:26:24,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:24,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:24,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-20 22:26:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2022-07-20 22:26:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:24,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608568502] [2022-07-20 22:26:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:24,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:24,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 22:26:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:26:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:25,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:25,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:25,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608568502] [2022-07-20 22:26:25,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608568502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:25,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:25,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811605397] [2022-07-20 22:26:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:25,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:25,004 INFO L87 Difference]: Start difference. First operand 207 states and 274 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:25,098 INFO L93 Difference]: Finished difference Result 334 states and 445 transitions. [2022-07-20 22:26:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:26:25,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-20 22:26:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:25,100 INFO L225 Difference]: With dead ends: 334 [2022-07-20 22:26:25,100 INFO L226 Difference]: Without dead ends: 292 [2022-07-20 22:26:25,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:25,101 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 205 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:25,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 424 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-20 22:26:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 207. [2022-07-20 22:26:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 185 states have internal predecessors, (233), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-20 22:26:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2022-07-20 22:26:25,112 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 49 [2022-07-20 22:26:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:25,112 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2022-07-20 22:26:25,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2022-07-20 22:26:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 22:26:25,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:25,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:25,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:25,320 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2022-07-20 22:26:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:25,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497947188] [2022-07-20 22:26:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:25,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:25,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 22:26:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:26:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:25,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:25,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497947188] [2022-07-20 22:26:25,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497947188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:25,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:25,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884020238] [2022-07-20 22:26:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:25,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:25,368 INFO L87 Difference]: Start difference. First operand 207 states and 272 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:25,416 INFO L93 Difference]: Finished difference Result 325 states and 422 transitions. [2022-07-20 22:26:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-20 22:26:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:25,417 INFO L225 Difference]: With dead ends: 325 [2022-07-20 22:26:25,417 INFO L226 Difference]: Without dead ends: 294 [2022-07-20 22:26:25,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:25,418 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 108 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:25,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 263 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-20 22:26:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 211. [2022-07-20 22:26:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-20 22:26:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2022-07-20 22:26:25,433 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 49 [2022-07-20 22:26:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:25,433 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2022-07-20 22:26:25,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2022-07-20 22:26:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:25,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:25,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:25,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-20 22:26:25,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:25,640 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2022-07-20 22:26:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:25,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083044356] [2022-07-20 22:26:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:25,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:25,642 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:25,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 22:26:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 22:26:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:25,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:25,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:25,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083044356] [2022-07-20 22:26:25,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083044356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:25,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:25,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:25,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300178984] [2022-07-20 22:26:25,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:25,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:25,723 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:25,903 INFO L93 Difference]: Finished difference Result 327 states and 443 transitions. [2022-07-20 22:26:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:26:25,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-20 22:26:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:25,904 INFO L225 Difference]: With dead ends: 327 [2022-07-20 22:26:25,904 INFO L226 Difference]: Without dead ends: 303 [2022-07-20 22:26:25,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:25,905 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 177 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:25,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 574 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-20 22:26:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 248. [2022-07-20 22:26:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 219 states have (on average 1.269406392694064) internal successors, (278), 223 states have internal predecessors, (278), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-20 22:26:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 325 transitions. [2022-07-20 22:26:25,921 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 325 transitions. Word has length 50 [2022-07-20 22:26:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:25,921 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 325 transitions. [2022-07-20 22:26:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 325 transitions. [2022-07-20 22:26:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:25,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:25,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:25,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,128 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash -963972016, now seen corresponding path program 1 times [2022-07-20 22:26:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323610584] [2022-07-20 22:26:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:26,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 22:26:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:26:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:26,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:26,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323610584] [2022-07-20 22:26:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323610584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:26,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:26,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-20 22:26:26,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63696846] [2022-07-20 22:26:26,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:26,303 INFO L87 Difference]: Start difference. First operand 248 states and 325 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:26,374 INFO L93 Difference]: Finished difference Result 282 states and 364 transitions. [2022-07-20 22:26:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:26:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-20 22:26:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:26,376 INFO L225 Difference]: With dead ends: 282 [2022-07-20 22:26:26,376 INFO L226 Difference]: Without dead ends: 248 [2022-07-20 22:26:26,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:26,377 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 99 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:26,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 507 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-20 22:26:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2022-07-20 22:26:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 197 states have (on average 1.2791878172588833) internal successors, (252), 201 states have internal predecessors, (252), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-20 22:26:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 299 transitions. [2022-07-20 22:26:26,390 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 299 transitions. Word has length 50 [2022-07-20 22:26:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,390 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 299 transitions. [2022-07-20 22:26:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 299 transitions. [2022-07-20 22:26:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:26,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:26,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-20 22:26:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,597 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2022-07-20 22:26:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260361178] [2022-07-20 22:26:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:26,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:26,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 22:26:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:26,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:26,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260361178] [2022-07-20 22:26:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260361178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:26,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:26,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745700435] [2022-07-20 22:26:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:26,654 INFO L87 Difference]: Start difference. First operand 226 states and 299 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:26,679 INFO L93 Difference]: Finished difference Result 273 states and 355 transitions. [2022-07-20 22:26:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-20 22:26:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:26,680 INFO L225 Difference]: With dead ends: 273 [2022-07-20 22:26:26,681 INFO L226 Difference]: Without dead ends: 239 [2022-07-20 22:26:26,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:26,681 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:26,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 281 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-20 22:26:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2022-07-20 22:26:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 197 states have (on average 1.218274111675127) internal successors, (240), 201 states have internal predecessors, (240), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-20 22:26:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 287 transitions. [2022-07-20 22:26:26,692 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 287 transitions. Word has length 50 [2022-07-20 22:26:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,692 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 287 transitions. [2022-07-20 22:26:26,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 287 transitions. [2022-07-20 22:26:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:26:26,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:26,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,899 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2022-07-20 22:26:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:26,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118121650] [2022-07-20 22:26:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:26,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:26,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:26,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 22:26:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:26,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:26,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118121650] [2022-07-20 22:26:26,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118121650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:26,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:26,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232949598] [2022-07-20 22:26:26,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:26,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:26,953 INFO L87 Difference]: Start difference. First operand 226 states and 287 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:26,970 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2022-07-20 22:26:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-20 22:26:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:26,971 INFO L225 Difference]: With dead ends: 235 [2022-07-20 22:26:26,971 INFO L226 Difference]: Without dead ends: 194 [2022-07-20 22:26:26,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:26,972 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:26,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-20 22:26:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2022-07-20 22:26:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 158 states have (on average 1.2278481012658229) internal successors, (194), 164 states have internal predecessors, (194), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-20 22:26:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2022-07-20 22:26:26,980 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 52 [2022-07-20 22:26:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,980 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2022-07-20 22:26:26,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2022-07-20 22:26:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:26:26,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:27,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:27,188 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2022-07-20 22:26:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748297921] [2022-07-20 22:26:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:27,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:27,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:27,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 22:26:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:26:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:27,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:27,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748297921] [2022-07-20 22:26:27,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748297921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:27,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:27,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630408079] [2022-07-20 22:26:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:27,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:27,264 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:27,385 INFO L93 Difference]: Finished difference Result 270 states and 348 transitions. [2022-07-20 22:26:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-20 22:26:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:27,386 INFO L225 Difference]: With dead ends: 270 [2022-07-20 22:26:27,386 INFO L226 Difference]: Without dead ends: 221 [2022-07-20 22:26:27,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:27,387 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 89 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:27,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 509 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-20 22:26:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2022-07-20 22:26:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.25) internal successors, (165), 138 states have internal predecessors, (165), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 22:26:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2022-07-20 22:26:27,394 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 52 [2022-07-20 22:26:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:27,395 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2022-07-20 22:26:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2022-07-20 22:26:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 22:26:27,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:27,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:27,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:27,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 147478644, now seen corresponding path program 1 times [2022-07-20 22:26:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823275514] [2022-07-20 22:26:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:27,613 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:27,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 22:26:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:27,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:26:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:29,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:29,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823275514] [2022-07-20 22:26:29,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823275514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:29,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:29,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674354322] [2022-07-20 22:26:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:29,678 INFO L87 Difference]: Start difference. First operand 158 states and 203 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:29,701 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2022-07-20 22:26:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-07-20 22:26:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:29,702 INFO L225 Difference]: With dead ends: 167 [2022-07-20 22:26:29,702 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 22:26:29,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:29,703 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 11 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:29,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-20 22:26:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 22:26:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-20 22:26:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 144 states have internal predecessors, (168), 23 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 22:26:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2022-07-20 22:26:29,712 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 54 [2022-07-20 22:26:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:29,713 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2022-07-20 22:26:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2022-07-20 22:26:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 22:26:29,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:29,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:29,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:29,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:29,921 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash -36563148, now seen corresponding path program 1 times [2022-07-20 22:26:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640325860] [2022-07-20 22:26:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:29,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:29,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 22:26:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:26:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:34,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:34,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640325860] [2022-07-20 22:26:34,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640325860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:34,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:34,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:34,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469021722] [2022-07-20 22:26:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:34,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:34,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-07-20 22:26:34,588 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:34,619 INFO L93 Difference]: Finished difference Result 212 states and 271 transitions. [2022-07-20 22:26:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-07-20 22:26:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:34,621 INFO L225 Difference]: With dead ends: 212 [2022-07-20 22:26:34,621 INFO L226 Difference]: Without dead ends: 210 [2022-07-20 22:26:34,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-07-20 22:26:34,621 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 41 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:34,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 582 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-07-20 22:26:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-20 22:26:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 162. [2022-07-20 22:26:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 141 states have internal predecessors, (168), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 22:26:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2022-07-20 22:26:34,631 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 55 [2022-07-20 22:26:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:34,632 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2022-07-20 22:26:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2022-07-20 22:26:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:34,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:34,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:34,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:34,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2022-07-20 22:26:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:34,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586286922] [2022-07-20 22:26:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:34,841 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:34,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 22:26:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 22:26:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:35,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:35,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586286922] [2022-07-20 22:26:35,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586286922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:35,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:35,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-20 22:26:35,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868534525] [2022-07-20 22:26:35,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 22:26:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 22:26:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:26:35,206 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:36,287 INFO L93 Difference]: Finished difference Result 237 states and 303 transitions. [2022-07-20 22:26:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:26:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-07-20 22:26:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:36,289 INFO L225 Difference]: With dead ends: 237 [2022-07-20 22:26:36,289 INFO L226 Difference]: Without dead ends: 225 [2022-07-20 22:26:36,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-20 22:26:36,293 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 170 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:36,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 955 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:26:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-20 22:26:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2022-07-20 22:26:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 141 states have internal predecessors, (166), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 22:26:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-07-20 22:26:36,307 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 58 [2022-07-20 22:26:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:36,307 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-07-20 22:26:36,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-07-20 22:26:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:26:36,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:36,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:36,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:36,515 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2022-07-20 22:26:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635545304] [2022-07-20 22:26:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:36,517 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:36,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 22:26:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:36,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:36,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635545304] [2022-07-20 22:26:36,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635545304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:36,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:36,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758361608] [2022-07-20 22:26:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:36,576 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:36,624 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2022-07-20 22:26:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-07-20 22:26:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:36,626 INFO L225 Difference]: With dead ends: 181 [2022-07-20 22:26:36,626 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 22:26:36,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:36,626 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 40 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:36,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 499 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 22:26:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2022-07-20 22:26:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 144 states have internal predecessors, (169), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 22:26:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2022-07-20 22:26:36,638 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 60 [2022-07-20 22:26:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:36,638 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2022-07-20 22:26:36,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2022-07-20 22:26:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:26:36,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:36,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:36,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:36,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:36,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362596, now seen corresponding path program 1 times [2022-07-20 22:26:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:36,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844697896] [2022-07-20 22:26:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:36,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:36,847 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:36,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 22:26:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 22:26:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:37,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:37,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:37,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844697896] [2022-07-20 22:26:37,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844697896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:37,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:37,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-20 22:26:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322378888] [2022-07-20 22:26:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:26:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:26:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:26:37,166 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:38,484 INFO L93 Difference]: Finished difference Result 431 states and 558 transitions. [2022-07-20 22:26:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:26:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-07-20 22:26:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:38,486 INFO L225 Difference]: With dead ends: 431 [2022-07-20 22:26:38,486 INFO L226 Difference]: Without dead ends: 399 [2022-07-20 22:26:38,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-20 22:26:38,487 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 462 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:38,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 985 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:26:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-20 22:26:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 196. [2022-07-20 22:26:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 165 states have (on average 1.206060606060606) internal successors, (199), 172 states have internal predecessors, (199), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 22:26:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2022-07-20 22:26:38,505 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 60 [2022-07-20 22:26:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:38,506 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2022-07-20 22:26:38,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2022-07-20 22:26:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:26:38,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:38,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:38,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:38,714 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 865353347, now seen corresponding path program 1 times [2022-07-20 22:26:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:38,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955128567] [2022-07-20 22:26:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:38,716 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:38,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 22:26:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:38,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:38,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:38,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955128567] [2022-07-20 22:26:38,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955128567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:38,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:38,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:38,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656664386] [2022-07-20 22:26:38,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:38,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:38,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:38,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:38,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:38,771 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:38,820 INFO L93 Difference]: Finished difference Result 218 states and 269 transitions. [2022-07-20 22:26:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-07-20 22:26:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:38,822 INFO L225 Difference]: With dead ends: 218 [2022-07-20 22:26:38,822 INFO L226 Difference]: Without dead ends: 216 [2022-07-20 22:26:38,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:38,823 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 34 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:38,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 495 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-20 22:26:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 201. [2022-07-20 22:26:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 168 states have (on average 1.2023809523809523) internal successors, (202), 176 states have internal predecessors, (202), 24 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-20 22:26:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 248 transitions. [2022-07-20 22:26:38,839 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 248 transitions. Word has length 60 [2022-07-20 22:26:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:38,839 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 248 transitions. [2022-07-20 22:26:38,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 248 transitions. [2022-07-20 22:26:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:38,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:38,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:38,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:39,047 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2022-07-20 22:26:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:39,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686298484] [2022-07-20 22:26:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:39,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:39,049 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:39,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 22:26:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 22:26:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:26:39,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:39,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686298484] [2022-07-20 22:26:39,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686298484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:39,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:39,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-20 22:26:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078449260] [2022-07-20 22:26:39,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 22:26:39,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 22:26:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:26:39,739 INFO L87 Difference]: Start difference. First operand 201 states and 248 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:39,985 INFO L93 Difference]: Finished difference Result 339 states and 426 transitions. [2022-07-20 22:26:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:26:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-07-20 22:26:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:39,987 INFO L225 Difference]: With dead ends: 339 [2022-07-20 22:26:39,987 INFO L226 Difference]: Without dead ends: 319 [2022-07-20 22:26:39,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:26:39,989 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 56 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:39,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1060 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 331 Unchecked, 0.1s Time] [2022-07-20 22:26:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-20 22:26:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2022-07-20 22:26:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.2057142857142857) internal successors, (211), 183 states have internal predecessors, (211), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 22:26:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 259 transitions. [2022-07-20 22:26:40,016 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 259 transitions. Word has length 65 [2022-07-20 22:26:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 259 transitions. [2022-07-20 22:26:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 259 transitions. [2022-07-20 22:26:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:40,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:40,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:40,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:40,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:40,224 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1450417120, now seen corresponding path program 1 times [2022-07-20 22:26:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:40,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028261817] [2022-07-20 22:26:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:40,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:40,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:40,226 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:40,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 22:26:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:26:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:26:42,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:42,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028261817] [2022-07-20 22:26:42,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028261817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:42,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:42,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:26:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726477965] [2022-07-20 22:26:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:42,495 INFO L87 Difference]: Start difference. First operand 209 states and 259 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:42,701 INFO L93 Difference]: Finished difference Result 275 states and 341 transitions. [2022-07-20 22:26:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:26:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-07-20 22:26:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:42,702 INFO L225 Difference]: With dead ends: 275 [2022-07-20 22:26:42,703 INFO L226 Difference]: Without dead ends: 255 [2022-07-20 22:26:42,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:26:42,703 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 65 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:42,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 602 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 204 Unchecked, 0.0s Time] [2022-07-20 22:26:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-20 22:26:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 208. [2022-07-20 22:26:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 182 states have internal predecessors, (209), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 22:26:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 257 transitions. [2022-07-20 22:26:42,721 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 257 transitions. Word has length 65 [2022-07-20 22:26:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:42,722 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 257 transitions. [2022-07-20 22:26:42,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 257 transitions. [2022-07-20 22:26:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:26:42,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:42,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:42,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:42,935 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -957629534, now seen corresponding path program 1 times [2022-07-20 22:26:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:42,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230558057] [2022-07-20 22:26:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:42,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:42,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 22:26:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 22:26:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-20 22:26:43,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:43,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230558057] [2022-07-20 22:26:43,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230558057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [280629813] [2022-07-20 22:26:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:43,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 22:26:43,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 22:26:43,896 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 22:26:43,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-20 22:26:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 22:26:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-20 22:26:51,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:51,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [280629813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:51,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:51,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2022-07-20 22:26:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835790440] [2022-07-20 22:26:51,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:51,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 22:26:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 22:26:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=581, Unknown=3, NotChecked=0, Total=650 [2022-07-20 22:26:51,331 INFO L87 Difference]: Start difference. First operand 208 states and 257 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 22:27:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:04,421 INFO L93 Difference]: Finished difference Result 358 states and 449 transitions. [2022-07-20 22:27:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 22:27:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-07-20 22:27:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:04,423 INFO L225 Difference]: With dead ends: 358 [2022-07-20 22:27:04,423 INFO L226 Difference]: Without dead ends: 338 [2022-07-20 22:27:04,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=126, Invalid=863, Unknown=3, NotChecked=0, Total=992 [2022-07-20 22:27:04,424 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 150 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:04,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1869 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 503 Unchecked, 0.1s Time] [2022-07-20 22:27:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-20 22:27:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 210. [2022-07-20 22:27:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 184 states have internal predecessors, (213), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 22:27:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2022-07-20 22:27:04,450 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 66 [2022-07-20 22:27:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:04,450 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2022-07-20 22:27:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 22:27:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2022-07-20 22:27:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:27:04,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:04,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:04,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-07-20 22:27:04,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-20 22:27:04,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:04,853 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash -660447408, now seen corresponding path program 1 times [2022-07-20 22:27:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92556662] [2022-07-20 22:27:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:04,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:04,855 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:04,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-20 22:27:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 22:27:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:05,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:05,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:05,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92556662] [2022-07-20 22:27:05,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92556662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:05,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:05,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-20 22:27:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491601917] [2022-07-20 22:27:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:27:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:27:05,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:27:05,319 INFO L87 Difference]: Start difference. First operand 210 states and 261 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:06,266 INFO L93 Difference]: Finished difference Result 313 states and 390 transitions. [2022-07-20 22:27:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:27:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-20 22:27:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:06,268 INFO L225 Difference]: With dead ends: 313 [2022-07-20 22:27:06,268 INFO L226 Difference]: Without dead ends: 305 [2022-07-20 22:27:06,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:27:06,268 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 129 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:06,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 737 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:27:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-20 22:27:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 211. [2022-07-20 22:27:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 177 states have (on average 1.2033898305084745) internal successors, (213), 185 states have internal predecessors, (213), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 22:27:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2022-07-20 22:27:06,308 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 66 [2022-07-20 22:27:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:06,308 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2022-07-20 22:27:06,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2022-07-20 22:27:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:27:06,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:06,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:06,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:06,515 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2022-07-20 22:27:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826224121] [2022-07-20 22:27:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:06,517 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:06,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 22:27:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:27:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:06,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:06,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826224121] [2022-07-20 22:27:06,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826224121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:06,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:06,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:27:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81556314] [2022-07-20 22:27:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:27:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:27:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:27:06,715 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:07,000 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2022-07-20 22:27:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:27:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-20 22:27:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:07,002 INFO L225 Difference]: With dead ends: 338 [2022-07-20 22:27:07,002 INFO L226 Difference]: Without dead ends: 318 [2022-07-20 22:27:07,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:27:07,003 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 95 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 714 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-07-20 22:27:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-20 22:27:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 201. [2022-07-20 22:27:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 176 states have internal predecessors, (201), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 22:27:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 245 transitions. [2022-07-20 22:27:07,027 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 245 transitions. Word has length 66 [2022-07-20 22:27:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:07,028 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 245 transitions. [2022-07-20 22:27:07,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 245 transitions. [2022-07-20 22:27:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 22:27:07,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:07,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:07,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-20 22:27:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:07,235 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1041931164, now seen corresponding path program 1 times [2022-07-20 22:27:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:07,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512450907] [2022-07-20 22:27:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:07,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:07,238 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:07,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 22:27:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:27:07,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:27:07,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:27:07,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512450907] [2022-07-20 22:27:07,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512450907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:27:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737326837] [2022-07-20 22:27:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:07,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 22:27:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 22:27:07,613 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 22:27:07,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-20 22:27:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:27:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:27:07,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:27:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:27:07,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737326837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:27:07,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:27:07,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 12 [2022-07-20 22:27:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700648360] [2022-07-20 22:27:07,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:27:07,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:27:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:27:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:27:07,735 INFO L87 Difference]: Start difference. First operand 201 states and 245 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:07,873 INFO L93 Difference]: Finished difference Result 232 states and 273 transitions. [2022-07-20 22:27:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:27:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 67 [2022-07-20 22:27:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:07,874 INFO L225 Difference]: With dead ends: 232 [2022-07-20 22:27:07,874 INFO L226 Difference]: Without dead ends: 174 [2022-07-20 22:27:07,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-07-20 22:27:07,875 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 60 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:07,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 797 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-07-20 22:27:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-20 22:27:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-07-20 22:27:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 145 states have (on average 1.186206896551724) internal successors, (172), 151 states have internal predecessors, (172), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 22:27:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-07-20 22:27:07,896 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 67 [2022-07-20 22:27:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:07,896 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-07-20 22:27:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-07-20 22:27:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 22:27:07,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:07,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:07,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-07-20 22:27:08,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-20 22:27:08,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,299 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2022-07-20 22:27:08,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:08,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164599730] [2022-07-20 22:27:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:08,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:08,301 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:08,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-20 22:27:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:27:08,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:08,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:08,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:08,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164599730] [2022-07-20 22:27:08,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164599730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:08,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:08,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:27:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45574579] [2022-07-20 22:27:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:08,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:27:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:27:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:27:08,368 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-20 22:27:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:08,422 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-07-20 22:27:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:27:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-07-20 22:27:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:08,423 INFO L225 Difference]: With dead ends: 209 [2022-07-20 22:27:08,423 INFO L226 Difference]: Without dead ends: 195 [2022-07-20 22:27:08,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:27:08,424 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:08,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:27:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-20 22:27:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-07-20 22:27:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 148 states have internal predecessors, (164), 21 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 22:27:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 204 transitions. [2022-07-20 22:27:08,442 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 204 transitions. Word has length 68 [2022-07-20 22:27:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:08,443 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 204 transitions. [2022-07-20 22:27:08,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-20 22:27:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 204 transitions. [2022-07-20 22:27:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 22:27:08,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:08,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:08,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:08,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,650 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 106001302, now seen corresponding path program 1 times [2022-07-20 22:27:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654431789] [2022-07-20 22:27:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:08,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:08,652 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:08,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-20 22:27:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:27:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:08,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:08,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654431789] [2022-07-20 22:27:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654431789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:08,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:08,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:27:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544846560] [2022-07-20 22:27:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:27:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:27:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:27:08,712 INFO L87 Difference]: Start difference. First operand 170 states and 204 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-20 22:27:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:08,764 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-07-20 22:27:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:27:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-07-20 22:27:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:08,765 INFO L225 Difference]: With dead ends: 199 [2022-07-20 22:27:08,765 INFO L226 Difference]: Without dead ends: 185 [2022-07-20 22:27:08,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:27:08,766 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:27:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-20 22:27:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2022-07-20 22:27:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 123 states have internal predecessors, (140), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 22:27:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-07-20 22:27:08,784 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 68 [2022-07-20 22:27:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:08,784 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-07-20 22:27:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-20 22:27:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-07-20 22:27:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 22:27:08,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:08,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:08,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-20 22:27:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,992 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1565040980, now seen corresponding path program 1 times [2022-07-20 22:27:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985444536] [2022-07-20 22:27:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:08,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:08,993 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:08,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-20 22:27:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:27:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:09,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:09,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985444536] [2022-07-20 22:27:09,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985444536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:09,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:09,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:27:09,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957877422] [2022-07-20 22:27:09,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:27:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:27:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:27:09,055 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 22:27:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:09,084 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2022-07-20 22:27:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:27:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-07-20 22:27:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:09,085 INFO L225 Difference]: With dead ends: 170 [2022-07-20 22:27:09,085 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 22:27:09,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:27:09,086 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 43 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:09,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 247 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:27:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 22:27:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2022-07-20 22:27:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:27:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-07-20 22:27:09,109 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 70 [2022-07-20 22:27:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:09,109 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-07-20 22:27:09,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 22:27:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-07-20 22:27:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 22:27:09,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:09,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:09,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:09,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:09,316 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1885920814, now seen corresponding path program 1 times [2022-07-20 22:27:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992660238] [2022-07-20 22:27:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:09,318 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:09,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-20 22:27:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 22:27:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 22:27:09,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:27:09,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992660238] [2022-07-20 22:27:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992660238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:27:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745248371] [2022-07-20 22:27:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 22:27:09,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 22:27:09,840 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 22:27:09,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-20 22:27:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:09,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 22:27:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 22:27:09,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745248371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:09,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:27:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-20 22:27:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110581267] [2022-07-20 22:27:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:27:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:27:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:27:09,998 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 22:27:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:10,176 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2022-07-20 22:27:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:27:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-07-20 22:27:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:10,177 INFO L225 Difference]: With dead ends: 175 [2022-07-20 22:27:10,177 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 22:27:10,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:27:10,178 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 107 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:10,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 273 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:27:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 22:27:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2022-07-20 22:27:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 93 states have internal predecessors, (104), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:27:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2022-07-20 22:27:10,190 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 70 [2022-07-20 22:27:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:10,190 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2022-07-20 22:27:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 22:27:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2022-07-20 22:27:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 22:27:10,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:10,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:10,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-20 22:27:10,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 22:27:10,597 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2134286868, now seen corresponding path program 1 times [2022-07-20 22:27:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404896740] [2022-07-20 22:27:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:10,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:10,600 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:10,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-20 22:27:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:27:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:27:13,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:13,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:13,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404896740] [2022-07-20 22:27:13,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404896740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:13,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:13,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:27:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660205750] [2022-07-20 22:27:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:13,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:27:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:27:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-20 22:27:13,092 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:13,461 INFO L93 Difference]: Finished difference Result 148 states and 169 transitions. [2022-07-20 22:27:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:27:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-07-20 22:27:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:13,462 INFO L225 Difference]: With dead ends: 148 [2022-07-20 22:27:13,462 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 22:27:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=33, Invalid=98, Unknown=1, NotChecked=0, Total=132 [2022-07-20 22:27:13,463 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 12 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:13,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 657 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 202 Unchecked, 0.0s Time] [2022-07-20 22:27:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 22:27:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2022-07-20 22:27:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 101 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 22:27:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2022-07-20 22:27:13,479 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 70 [2022-07-20 22:27:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:13,479 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2022-07-20 22:27:13,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:27:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2022-07-20 22:27:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 22:27:13,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:13,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:13,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:13,686 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2022-07-20 22:27:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:13,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541706694] [2022-07-20 22:27:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:13,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:13,688 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:13,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-20 22:27:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:27:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:27:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:27:14,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541706694] [2022-07-20 22:27:14,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541706694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:27:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1916244183] [2022-07-20 22:27:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 22:27:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 22:27:14,047 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 22:27:14,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-20 22:27:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:27:14,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:27:14,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:27:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:27:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1916244183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:27:14,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:27:14,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 11 [2022-07-20 22:27:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481456201] [2022-07-20 22:27:14,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:27:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:27:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:27:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:27:14,178 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:14,257 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-07-20 22:27:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:27:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2022-07-20 22:27:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:14,258 INFO L225 Difference]: With dead ends: 128 [2022-07-20 22:27:14,258 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 22:27:14,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-20 22:27:14,259 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:14,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 554 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-07-20 22:27:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 22:27:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-20 22:27:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 22:27:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-07-20 22:27:14,264 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 69 [2022-07-20 22:27:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:14,265 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-07-20 22:27:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-07-20 22:27:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 22:27:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:14,265 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:14,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-07-20 22:27:14,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-07-20 22:27:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 22:27:14,666 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2022-07-20 22:27:14,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10496932] [2022-07-20 22:27:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:14,667 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-20 22:27:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 22:27:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:27:17,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:17,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:17,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10496932] [2022-07-20 22:27:17,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10496932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:17,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:17,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 22:27:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942425442] [2022-07-20 22:27:17,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:17,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:27:17,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:27:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2022-07-20 22:27:17,992 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:20,073 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-07-20 22:27:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:27:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-07-20 22:27:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:20,074 INFO L225 Difference]: With dead ends: 104 [2022-07-20 22:27:20,074 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 22:27:20,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2022-07-20 22:27:20,075 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 21 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:20,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 481 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 114 Unchecked, 0.0s Time] [2022-07-20 22:27:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 22:27:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2022-07-20 22:27:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:27:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-07-20 22:27:20,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 73 [2022-07-20 22:27:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:20,084 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-07-20 22:27:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-07-20 22:27:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 22:27:20,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:20,085 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:20,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-07-20 22:27:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:20,291 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 696504559, now seen corresponding path program 1 times [2022-07-20 22:27:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427880290] [2022-07-20 22:27:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:20,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:20,293 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:20,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-20 22:27:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 22:27:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:27:21,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:21,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:21,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427880290] [2022-07-20 22:27:21,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427880290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:21,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:21,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 22:27:21,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48994193] [2022-07-20 22:27:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:21,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:27:21,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:27:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:27:21,125 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:21,197 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-07-20 22:27:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:27:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-07-20 22:27:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:21,198 INFO L225 Difference]: With dead ends: 108 [2022-07-20 22:27:21,198 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 22:27:21,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:27:21,200 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 584 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 213 Unchecked, 0.0s Time] [2022-07-20 22:27:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 22:27:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-07-20 22:27:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 62 states have internal predecessors, (69), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 22:27:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-07-20 22:27:21,206 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 73 [2022-07-20 22:27:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:21,206 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-07-20 22:27:21,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-07-20 22:27:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 22:27:21,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:21,207 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:21,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:21,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:21,414 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:21,414 INFO L85 PathProgramCache]: Analyzing trace with hash -405666381, now seen corresponding path program 1 times [2022-07-20 22:27:21,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:21,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215319243] [2022-07-20 22:27:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:21,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:21,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:21,416 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:21,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-20 22:27:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 22:27:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:27:22,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:22,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215319243] [2022-07-20 22:27:22,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215319243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:22,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:22,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 22:27:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850299951] [2022-07-20 22:27:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:22,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:27:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:27:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:27:22,472 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:25,173 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2022-07-20 22:27:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:27:25,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-07-20 22:27:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:25,174 INFO L225 Difference]: With dead ends: 107 [2022-07-20 22:27:25,174 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 22:27:25,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-20 22:27:25,175 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 75 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:25,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 541 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 43 Unchecked, 1.7s Time] [2022-07-20 22:27:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 22:27:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-07-20 22:27:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 22:27:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-07-20 22:27:25,190 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 73 [2022-07-20 22:27:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:25,192 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-07-20 22:27:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-07-20 22:27:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 22:27:25,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:25,192 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:25,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:25,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:25,393 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1028998347, now seen corresponding path program 1 times [2022-07-20 22:27:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:25,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810385772] [2022-07-20 22:27:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:25,395 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:25,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-20 22:27:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:27:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:27:25,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:25,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810385772] [2022-07-20 22:27:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810385772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:25,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:25,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:27:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047882591] [2022-07-20 22:27:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:25,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:27:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:27:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:27:25,681 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:25,823 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-20 22:27:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:27:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-07-20 22:27:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:25,824 INFO L225 Difference]: With dead ends: 96 [2022-07-20 22:27:25,824 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 22:27:25,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:27:25,825 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 26 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:25,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 482 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-07-20 22:27:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 22:27:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-07-20 22:27:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 22:27:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-07-20 22:27:25,837 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 74 [2022-07-20 22:27:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:25,837 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-07-20 22:27:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-07-20 22:27:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 22:27:25,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:25,838 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:25,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:26,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:26,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -770832909, now seen corresponding path program 1 times [2022-07-20 22:27:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711128750] [2022-07-20 22:27:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:26,042 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:26,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-20 22:27:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:26,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 22:27:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:27:26,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:26,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711128750] [2022-07-20 22:27:26,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711128750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:26,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:26,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-20 22:27:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474010395] [2022-07-20 22:27:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:26,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 22:27:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 22:27:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:27:26,644 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:26,730 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-20 22:27:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:27:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-07-20 22:27:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:26,731 INFO L225 Difference]: With dead ends: 96 [2022-07-20 22:27:26,731 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 22:27:26,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:27:26,731 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 19 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:26,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 632 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 209 Unchecked, 0.0s Time] [2022-07-20 22:27:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 22:27:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-20 22:27:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 22:27:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-07-20 22:27:26,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 74 [2022-07-20 22:27:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:26,737 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-07-20 22:27:26,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-07-20 22:27:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 22:27:26,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:26,738 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:26,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-07-20 22:27:26,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:26,939 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2022-07-20 22:27:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:26,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200235327] [2022-07-20 22:27:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:26,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:26,941 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:26,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-20 22:27:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 22:27:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:27:27,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:27,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200235327] [2022-07-20 22:27:27,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200235327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:27,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:27,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-20 22:27:27,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565801286] [2022-07-20 22:27:27,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:27,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:27:27,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:27:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:27:27,859 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:28,640 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-07-20 22:27:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:27:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-07-20 22:27:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:28,641 INFO L225 Difference]: With dead ends: 76 [2022-07-20 22:27:28,641 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 22:27:28,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:27:28,642 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:28,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 491 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-07-20 22:27:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 22:27:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-20 22:27:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 22:27:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-07-20 22:27:28,648 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 74 [2022-07-20 22:27:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:28,648 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-07-20 22:27:28,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-07-20 22:27:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 22:27:28,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:27:28,649 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:27:28,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-20 22:27:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:28,856 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:27:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:27:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1165199695, now seen corresponding path program 1 times [2022-07-20 22:27:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:27:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512685454] [2022-07-20 22:27:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:27:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:27:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:27:28,857 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:27:28,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-20 22:27:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:27:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:27:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:27:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:27:29,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:27:29,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:27:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512685454] [2022-07-20 22:27:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512685454] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:27:29,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:27:29,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:27:29,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612937810] [2022-07-20 22:27:29,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:27:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:27:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:27:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:27:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:27:29,013 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:27:29,107 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-07-20 22:27:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:27:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-07-20 22:27:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:27:29,107 INFO L225 Difference]: With dead ends: 68 [2022-07-20 22:27:29,107 INFO L226 Difference]: Without dead ends: 0 [2022-07-20 22:27:29,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:27:29,107 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:27:29,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 280 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-07-20 22:27:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-20 22:27:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-20 22:27:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:27:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-20 22:27:29,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-07-20 22:27:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:27:29,108 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-20 22:27:29,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 22:27:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-20 22:27:29,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-20 22:27:29,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:27:29,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-07-20 22:27:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:27:29,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-20 22:28:22,102 WARN L233 SmtUtils]: Spent 52.78s on a formula simplification. DAG size of input: 260 DAG size of output: 246 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)