./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 6c24879c 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-?-6c24879 [2022-07-11 23:40:37,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:40:37,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:40:37,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:40:37,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:40:37,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:40:37,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:40:37,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:40:37,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:40:37,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:40:37,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:40:37,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:40:37,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:40:37,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:40:37,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:40:37,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:40:37,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:40:37,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:40:37,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:40:37,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:40:37,113 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:40:37,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:40:37,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:40:37,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:40:37,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:40:37,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:40:37,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:40:37,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:40:37,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:40:37,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:40:37,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:40:37,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:40:37,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:40:37,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:40:37,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:40:37,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:40:37,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:40:37,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:40:37,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:40:37,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:40:37,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:40:37,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:40:37,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:40:37,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:40:37,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:40:37,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:40:37,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:40:37,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:40:37,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:40:37,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:40:37,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:40:37,166 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:40:37,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:40:37,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:40:37,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:40:37,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:40:37,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:40:37,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:40:37,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:40:37,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:40:37,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:40:37,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:40:37,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:40:37,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:40:37,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:40:37,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:40:37,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:40:37,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:40:37,171 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:40:37,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:40:37,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:40:37,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-07-11 23:40:37,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:40:37,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:40:37,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:40:37,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:40:37,403 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:40:37,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-11 23:40:37,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ca97c75/31dc14def0f846448ac55f340562fff9/FLAG822e9ffd1 [2022-07-11 23:40:37,865 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:40:37,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-11 23:40:37,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ca97c75/31dc14def0f846448ac55f340562fff9/FLAG822e9ffd1 [2022-07-11 23:40:37,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ca97c75/31dc14def0f846448ac55f340562fff9 [2022-07-11 23:40:37,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:40:37,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:40:37,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:40:37,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:40:37,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:40:37,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:40:37" (1/1) ... [2022-07-11 23:40:37,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba1db69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:37, skipping insertion in model container [2022-07-11 23:40:37,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:40:37" (1/1) ... [2022-07-11 23:40:37,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:40:37,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:40:38,107 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] [2022-07-11 23:40:38,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:40:38,161 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:40:38,170 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] [2022-07-11 23:40:38,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:40:38,230 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:40:38,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38 WrapperNode [2022-07-11 23:40:38,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:40:38,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:40:38,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:40:38,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:40:38,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,280 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 214 [2022-07-11 23:40:38,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:40:38,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:40:38,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:40:38,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:40:38,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:40:38,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:40:38,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:40:38,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:40:38,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (1/1) ... [2022-07-11 23:40:38,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:40:38,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:38,374 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) [2022-07-11 23:40:38,375 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 [2022-07-11 23:40:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:40:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:40:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-11 23:40:38,409 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-11 23:40:38,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:40:38,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:40:38,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-11 23:40:38,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-11 23:40:38,525 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:40:38,527 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:40:38,939 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:40:38,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:40:38,951 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 23:40:38,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:40:38 BoogieIcfgContainer [2022-07-11 23:40:38,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:40:38,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:40:38,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:40:38,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:40:38,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:40:37" (1/3) ... [2022-07-11 23:40:38,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77dc1346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:40:38, skipping insertion in model container [2022-07-11 23:40:38,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:40:38" (2/3) ... [2022-07-11 23:40:38,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77dc1346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:40:38, skipping insertion in model container [2022-07-11 23:40:38,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:40:38" (3/3) ... [2022-07-11 23:40:38,970 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-07-11 23:40:38,983 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:40:38,984 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:40:39,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:40:39,050 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@190842d8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b424bfa [2022-07-11 23:40:39,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:40:39,056 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) [2022-07-11 23:40:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-11 23:40:39,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:39,071 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] [2022-07-11 23:40:39,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 34880883, now seen corresponding path program 1 times [2022-07-11 23:40:39,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:39,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187929915] [2022-07-11 23:40:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:39,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187929915] [2022-07-11 23:40:39,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187929915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:39,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:39,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:40:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706268066] [2022-07-11 23:40:39,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:39,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:39,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:39,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:40:39,391 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) [2022-07-11 23:40:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:39,550 INFO L93 Difference]: Finished difference Result 276 states and 479 transitions. [2022-07-11 23:40:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:40:39,552 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 [2022-07-11 23:40:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:39,565 INFO L225 Difference]: With dead ends: 276 [2022-07-11 23:40:39,565 INFO L226 Difference]: Without dead ends: 165 [2022-07-11 23:40:39,570 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 [2022-07-11 23:40:39,573 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 111 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-11 23:40:39,575 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] [2022-07-11 23:40:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-11 23:40:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2022-07-11 23:40:39,629 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) [2022-07-11 23:40:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 219 transitions. [2022-07-11 23:40:39,633 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 219 transitions. Word has length 37 [2022-07-11 23:40:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:39,634 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 219 transitions. [2022-07-11 23:40:39,635 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) [2022-07-11 23:40:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 219 transitions. [2022-07-11 23:40:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:40:39,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:39,642 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] [2022-07-11 23:40:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:40:39,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 455630144, now seen corresponding path program 1 times [2022-07-11 23:40:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:39,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020731800] [2022-07-11 23:40:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020731800] [2022-07-11 23:40:39,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020731800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:39,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:39,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:40:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220950452] [2022-07-11 23:40:39,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:40:39,782 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) [2022-07-11 23:40:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:39,857 INFO L93 Difference]: Finished difference Result 275 states and 410 transitions. [2022-07-11 23:40:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:40:39,858 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 [2022-07-11 23:40:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:39,863 INFO L225 Difference]: With dead ends: 275 [2022-07-11 23:40:39,865 INFO L226 Difference]: Without dead ends: 236 [2022-07-11 23:40:39,870 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 [2022-07-11 23:40:39,872 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 [2022-07-11 23:40:39,873 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] [2022-07-11 23:40:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-11 23:40:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-07-11 23:40:39,886 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) [2022-07-11 23:40:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 319 transitions. [2022-07-11 23:40:39,888 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 319 transitions. Word has length 39 [2022-07-11 23:40:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 319 transitions. [2022-07-11 23:40:39,888 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) [2022-07-11 23:40:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 319 transitions. [2022-07-11 23:40:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:40:39,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:39,907 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] [2022-07-11 23:40:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:40:39,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -999534858, now seen corresponding path program 1 times [2022-07-11 23:40:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341976396] [2022-07-11 23:40:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:40,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341976396] [2022-07-11 23:40:40,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341976396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:40,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:40:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206432001] [2022-07-11 23:40:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:40:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:40:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:40,032 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) [2022-07-11 23:40:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:40,118 INFO L93 Difference]: Finished difference Result 353 states and 519 transitions. [2022-07-11 23:40:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:40,119 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 [2022-07-11 23:40:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:40,121 INFO L225 Difference]: With dead ends: 353 [2022-07-11 23:40:40,121 INFO L226 Difference]: Without dead ends: 321 [2022-07-11 23:40:40,124 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 [2022-07-11 23:40:40,128 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 [2022-07-11 23:40:40,129 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] [2022-07-11 23:40:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-11 23:40:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-07-11 23:40:40,156 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) [2022-07-11 23:40:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 400 transitions. [2022-07-11 23:40:40,158 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 400 transitions. Word has length 40 [2022-07-11 23:40:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:40,159 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 400 transitions. [2022-07-11 23:40:40,159 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) [2022-07-11 23:40:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 400 transitions. [2022-07-11 23:40:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:40:40,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:40,163 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] [2022-07-11 23:40:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:40:40,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2020603212, now seen corresponding path program 1 times [2022-07-11 23:40:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:40,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014675434] [2022-07-11 23:40:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014675434] [2022-07-11 23:40:40,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014675434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:40,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:40:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931182291] [2022-07-11 23:40:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:40,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:40:40,235 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) [2022-07-11 23:40:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:40,270 INFO L93 Difference]: Finished difference Result 294 states and 430 transitions. [2022-07-11 23:40:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:40:40,271 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 [2022-07-11 23:40:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:40,273 INFO L225 Difference]: With dead ends: 294 [2022-07-11 23:40:40,273 INFO L226 Difference]: Without dead ends: 287 [2022-07-11 23:40:40,273 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 [2022-07-11 23:40:40,278 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 [2022-07-11 23:40:40,280 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] [2022-07-11 23:40:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-11 23:40:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-07-11 23:40:40,292 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) [2022-07-11 23:40:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2022-07-11 23:40:40,294 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 401 transitions. Word has length 40 [2022-07-11 23:40:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:40,294 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-11 23:40:40,294 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) [2022-07-11 23:40:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 401 transitions. [2022-07-11 23:40:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 23:40:40,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:40,295 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] [2022-07-11 23:40:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:40:40,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash 979727251, now seen corresponding path program 1 times [2022-07-11 23:40:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183669495] [2022-07-11 23:40:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183669495] [2022-07-11 23:40:40,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183669495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696665240] [2022-07-11 23:40:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:40,427 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) [2022-07-11 23:40:40,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:40:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:40,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:40:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:40:40,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696665240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:40,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:40,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-07-11 23:40:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064422717] [2022-07-11 23:40:40,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 23:40:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 23:40:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:40:40,811 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) [2022-07-11 23:40:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:41,416 INFO L93 Difference]: Finished difference Result 561 states and 847 transitions. [2022-07-11 23:40:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 23:40:41,417 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 [2022-07-11 23:40:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:41,419 INFO L225 Difference]: With dead ends: 561 [2022-07-11 23:40:41,419 INFO L226 Difference]: Without dead ends: 290 [2022-07-11 23:40:41,420 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 [2022-07-11 23:40:41,420 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 [2022-07-11 23:40:41,420 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] [2022-07-11 23:40:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-11 23:40:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-07-11 23:40:41,428 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) [2022-07-11 23:40:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-07-11 23:40:41,429 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 41 [2022-07-11 23:40:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:41,429 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-07-11 23:40:41,430 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) [2022-07-11 23:40:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-07-11 23:40:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:40:41,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:41,430 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] [2022-07-11 23:40:41,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:41,631 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 [2022-07-11 23:40:41,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1984626021, now seen corresponding path program 1 times [2022-07-11 23:40:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:41,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479002373] [2022-07-11 23:40:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:41,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479002373] [2022-07-11 23:40:41,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479002373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:41,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:41,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:40:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009117418] [2022-07-11 23:40:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:40:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:40:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:41,699 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) [2022-07-11 23:40:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:41,747 INFO L93 Difference]: Finished difference Result 205 states and 301 transitions. [2022-07-11 23:40:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:41,747 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 [2022-07-11 23:40:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:41,749 INFO L225 Difference]: With dead ends: 205 [2022-07-11 23:40:41,749 INFO L226 Difference]: Without dead ends: 179 [2022-07-11 23:40:41,749 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 [2022-07-11 23:40:41,750 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 [2022-07-11 23:40:41,750 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] [2022-07-11 23:40:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-11 23:40:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-07-11 23:40:41,756 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) [2022-07-11 23:40:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-11 23:40:41,757 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 43 [2022-07-11 23:40:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:41,757 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-11 23:40:41,757 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) [2022-07-11 23:40:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-11 23:40:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:40:41,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:41,759 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] [2022-07-11 23:40:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:40:41,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2064334730, now seen corresponding path program 1 times [2022-07-11 23:40:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495642753] [2022-07-11 23:40:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:41,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495642753] [2022-07-11 23:40:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495642753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:41,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:41,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:40:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9728063] [2022-07-11 23:40:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:40:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:40:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:40:41,815 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) [2022-07-11 23:40:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:41,890 INFO L93 Difference]: Finished difference Result 178 states and 255 transitions. [2022-07-11 23:40:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:40:41,891 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 [2022-07-11 23:40:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:41,894 INFO L225 Difference]: With dead ends: 178 [2022-07-11 23:40:41,894 INFO L226 Difference]: Without dead ends: 171 [2022-07-11 23:40:41,896 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 [2022-07-11 23:40:41,897 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:41,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 679 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:40:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-11 23:40:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2022-07-11 23:40:41,904 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) [2022-07-11 23:40:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2022-07-11 23:40:41,906 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 44 [2022-07-11 23:40:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:41,906 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2022-07-11 23:40:41,907 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) [2022-07-11 23:40:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2022-07-11 23:40:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:40:41,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:41,908 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] [2022-07-11 23:40:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:40:41,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash 659916354, now seen corresponding path program 1 times [2022-07-11 23:40:41,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:41,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785635144] [2022-07-11 23:40:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785635144] [2022-07-11 23:40:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785635144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871995759] [2022-07-11 23:40:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:42,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:42,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:42,044 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) [2022-07-11 23:40:42,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:40:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:40:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:40:42,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:42,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871995759] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:42,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:40:42,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2022-07-11 23:40:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411858108] [2022-07-11 23:40:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:40:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:40:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:40:42,303 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) [2022-07-11 23:40:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:42,371 INFO L93 Difference]: Finished difference Result 392 states and 558 transitions. [2022-07-11 23:40:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:40:42,372 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 [2022-07-11 23:40:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:42,373 INFO L225 Difference]: With dead ends: 392 [2022-07-11 23:40:42,373 INFO L226 Difference]: Without dead ends: 280 [2022-07-11 23:40:42,373 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 [2022-07-11 23:40:42,374 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 [2022-07-11 23:40:42,374 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] [2022-07-11 23:40:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-11 23:40:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-07-11 23:40:42,381 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) [2022-07-11 23:40:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 391 transitions. [2022-07-11 23:40:42,383 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 391 transitions. Word has length 45 [2022-07-11 23:40:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:42,383 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 391 transitions. [2022-07-11 23:40:42,383 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) [2022-07-11 23:40:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 391 transitions. [2022-07-11 23:40:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:40:42,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:42,384 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] [2022-07-11 23:40:42,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 23:40:42,608 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 [2022-07-11 23:40:42,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash -351200896, now seen corresponding path program 1 times [2022-07-11 23:40:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:42,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249208078] [2022-07-11 23:40:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:42,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249208078] [2022-07-11 23:40:42,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249208078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:42,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:42,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:40:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390972455] [2022-07-11 23:40:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:40:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:40:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:42,643 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) [2022-07-11 23:40:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:42,706 INFO L93 Difference]: Finished difference Result 422 states and 598 transitions. [2022-07-11 23:40:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:40:42,706 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 [2022-07-11 23:40:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:42,710 INFO L225 Difference]: With dead ends: 422 [2022-07-11 23:40:42,710 INFO L226 Difference]: Without dead ends: 382 [2022-07-11 23:40:42,711 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 [2022-07-11 23:40:42,712 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 [2022-07-11 23:40:42,713 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] [2022-07-11 23:40:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-11 23:40:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 311. [2022-07-11 23:40:42,721 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) [2022-07-11 23:40:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 438 transitions. [2022-07-11 23:40:42,723 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 438 transitions. Word has length 45 [2022-07-11 23:40:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 438 transitions. [2022-07-11 23:40:42,723 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) [2022-07-11 23:40:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 438 transitions. [2022-07-11 23:40:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:40:42,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:42,725 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] [2022-07-11 23:40:42,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:40:42,725 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:42,726 INFO L85 PathProgramCache]: Analyzing trace with hash 33312567, now seen corresponding path program 1 times [2022-07-11 23:40:42,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:42,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335110548] [2022-07-11 23:40:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:42,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:42,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335110548] [2022-07-11 23:40:42,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335110548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:42,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:40:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412647075] [2022-07-11 23:40:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:42,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:40:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:40:42,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:42,776 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) [2022-07-11 23:40:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:42,817 INFO L93 Difference]: Finished difference Result 335 states and 469 transitions. [2022-07-11 23:40:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:42,818 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 [2022-07-11 23:40:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:42,819 INFO L225 Difference]: With dead ends: 335 [2022-07-11 23:40:42,819 INFO L226 Difference]: Without dead ends: 319 [2022-07-11 23:40:42,820 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 [2022-07-11 23:40:42,820 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 [2022-07-11 23:40:42,820 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] [2022-07-11 23:40:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-11 23:40:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2022-07-11 23:40:42,828 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) [2022-07-11 23:40:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 436 transitions. [2022-07-11 23:40:42,829 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 436 transitions. Word has length 48 [2022-07-11 23:40:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:42,829 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 436 transitions. [2022-07-11 23:40:42,829 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) [2022-07-11 23:40:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 436 transitions. [2022-07-11 23:40:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:40:42,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:42,830 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] [2022-07-11 23:40:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:40:42,831 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -667752011, now seen corresponding path program 1 times [2022-07-11 23:40:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:42,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732668890] [2022-07-11 23:40:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732668890] [2022-07-11 23:40:42,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732668890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571623305] [2022-07-11 23:40:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:42,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:42,976 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) [2022-07-11 23:40:42,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:40:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:40:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:43,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:40:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571623305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:43,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:40:43,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-11 23:40:43,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173289454] [2022-07-11 23:40:43,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:40:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:43,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:40:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:40:43,075 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) [2022-07-11 23:40:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:43,204 INFO L93 Difference]: Finished difference Result 603 states and 839 transitions. [2022-07-11 23:40:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:40:43,205 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 [2022-07-11 23:40:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:43,207 INFO L225 Difference]: With dead ends: 603 [2022-07-11 23:40:43,208 INFO L226 Difference]: Without dead ends: 551 [2022-07-11 23:40:43,208 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 [2022-07-11 23:40:43,208 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 [2022-07-11 23:40:43,208 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] [2022-07-11 23:40:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-11 23:40:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 443. [2022-07-11 23:40:43,221 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) [2022-07-11 23:40:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 608 transitions. [2022-07-11 23:40:43,223 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 608 transitions. Word has length 48 [2022-07-11 23:40:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:43,223 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 608 transitions. [2022-07-11 23:40:43,223 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) [2022-07-11 23:40:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 608 transitions. [2022-07-11 23:40:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:40:43,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:43,224 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] [2022-07-11 23:40:43,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:43,442 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 [2022-07-11 23:40:43,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1653689311, now seen corresponding path program 1 times [2022-07-11 23:40:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:43,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997949273] [2022-07-11 23:40:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:43,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997949273] [2022-07-11 23:40:43,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997949273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:43,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:43,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:40:43,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248222839] [2022-07-11 23:40:43,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:43,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:43,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:43,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:43,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:40:43,468 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) [2022-07-11 23:40:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:43,525 INFO L93 Difference]: Finished difference Result 840 states and 1151 transitions. [2022-07-11 23:40:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:40:43,525 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 [2022-07-11 23:40:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:43,527 INFO L225 Difference]: With dead ends: 840 [2022-07-11 23:40:43,527 INFO L226 Difference]: Without dead ends: 524 [2022-07-11 23:40:43,528 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 [2022-07-11 23:40:43,528 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 [2022-07-11 23:40:43,528 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] [2022-07-11 23:40:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-07-11 23:40:43,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 448. [2022-07-11 23:40:43,537 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) [2022-07-11 23:40:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 603 transitions. [2022-07-11 23:40:43,538 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 603 transitions. Word has length 48 [2022-07-11 23:40:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:43,539 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 603 transitions. [2022-07-11 23:40:43,539 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) [2022-07-11 23:40:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 603 transitions. [2022-07-11 23:40:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:40:43,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:43,540 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] [2022-07-11 23:40:43,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:40:43,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1326392695, now seen corresponding path program 1 times [2022-07-11 23:40:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:43,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746145460] [2022-07-11 23:40:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:43,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746145460] [2022-07-11 23:40:43,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746145460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:43,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:43,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:40:43,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681318184] [2022-07-11 23:40:43,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:40:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:40:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:40:43,623 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) [2022-07-11 23:40:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:43,766 INFO L93 Difference]: Finished difference Result 622 states and 832 transitions. [2022-07-11 23:40:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:40:43,766 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 [2022-07-11 23:40:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:43,768 INFO L225 Difference]: With dead ends: 622 [2022-07-11 23:40:43,768 INFO L226 Difference]: Without dead ends: 533 [2022-07-11 23:40:43,769 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 [2022-07-11 23:40:43,770 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 [2022-07-11 23:40:43,770 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] [2022-07-11 23:40:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-11 23:40:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 445. [2022-07-11 23:40:43,796 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) [2022-07-11 23:40:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 598 transitions. [2022-07-11 23:40:43,798 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 598 transitions. Word has length 48 [2022-07-11 23:40:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:43,798 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 598 transitions. [2022-07-11 23:40:43,798 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) [2022-07-11 23:40:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 598 transitions. [2022-07-11 23:40:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:40:43,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:43,799 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] [2022-07-11 23:40:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:40:43,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1846534031, now seen corresponding path program 1 times [2022-07-11 23:40:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272057717] [2022-07-11 23:40:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:43,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272057717] [2022-07-11 23:40:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272057717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005342505] [2022-07-11 23:40:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:43,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:43,883 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) [2022-07-11 23:40:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:40:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 23:40:43,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:44,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005342505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:44,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:44,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-07-11 23:40:44,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760531090] [2022-07-11 23:40:44,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:44,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:40:44,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:40:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:40:44,100 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) [2022-07-11 23:40:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:44,530 INFO L93 Difference]: Finished difference Result 1186 states and 1594 transitions. [2022-07-11 23:40:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:40:44,531 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 [2022-07-11 23:40:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:44,533 INFO L225 Difference]: With dead ends: 1186 [2022-07-11 23:40:44,533 INFO L226 Difference]: Without dead ends: 808 [2022-07-11 23:40:44,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:40:44,534 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 [2022-07-11 23:40:44,535 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] [2022-07-11 23:40:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-11 23:40:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 644. [2022-07-11 23:40:44,557 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) [2022-07-11 23:40:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 843 transitions. [2022-07-11 23:40:44,559 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 843 transitions. Word has length 49 [2022-07-11 23:40:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:44,559 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 843 transitions. [2022-07-11 23:40:44,559 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) [2022-07-11 23:40:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 843 transitions. [2022-07-11 23:40:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:40:44,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:44,560 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] [2022-07-11 23:40:44,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-11 23:40:44,771 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 [2022-07-11 23:40:44,771 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash -763089014, now seen corresponding path program 1 times [2022-07-11 23:40:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127595483] [2022-07-11 23:40:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:44,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:40:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127595483] [2022-07-11 23:40:45,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127595483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724680980] [2022-07-11 23:40:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:45,023 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) [2022-07-11 23:40:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:40:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:40:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:45,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:40:45,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724680980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:45,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:40:45,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-07-11 23:40:45,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972931437] [2022-07-11 23:40:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:40:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:40:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:40:45,244 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) [2022-07-11 23:40:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:45,452 INFO L93 Difference]: Finished difference Result 842 states and 1113 transitions. [2022-07-11 23:40:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:45,453 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 [2022-07-11 23:40:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:45,455 INFO L225 Difference]: With dead ends: 842 [2022-07-11 23:40:45,455 INFO L226 Difference]: Without dead ends: 823 [2022-07-11 23:40:45,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-11 23:40:45,457 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 [2022-07-11 23:40:45,457 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] [2022-07-11 23:40:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-11 23:40:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 673. [2022-07-11 23:40:45,474 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) [2022-07-11 23:40:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 878 transitions. [2022-07-11 23:40:45,476 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 878 transitions. Word has length 50 [2022-07-11 23:40:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:45,476 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 878 transitions. [2022-07-11 23:40:45,476 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) [2022-07-11 23:40:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 878 transitions. [2022-07-11 23:40:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:40:45,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:45,477 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] [2022-07-11 23:40:45,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 23:40:45,691 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 [2022-07-11 23:40:45,691 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1851976375, now seen corresponding path program 1 times [2022-07-11 23:40:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:45,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359927254] [2022-07-11 23:40:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:40:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359927254] [2022-07-11 23:40:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359927254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:45,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:45,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:40:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687908780] [2022-07-11 23:40:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:40:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:40:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:40:45,737 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) [2022-07-11 23:40:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:45,813 INFO L93 Difference]: Finished difference Result 726 states and 951 transitions. [2022-07-11 23:40:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:45,814 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 [2022-07-11 23:40:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:45,816 INFO L225 Difference]: With dead ends: 726 [2022-07-11 23:40:45,816 INFO L226 Difference]: Without dead ends: 724 [2022-07-11 23:40:45,817 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 [2022-07-11 23:40:45,817 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 [2022-07-11 23:40:45,817 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] [2022-07-11 23:40:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-11 23:40:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 682. [2022-07-11 23:40:45,836 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) [2022-07-11 23:40:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 889 transitions. [2022-07-11 23:40:45,838 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 889 transitions. Word has length 51 [2022-07-11 23:40:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:45,838 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 889 transitions. [2022-07-11 23:40:45,838 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) [2022-07-11 23:40:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 889 transitions. [2022-07-11 23:40:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:40:45,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:45,839 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] [2022-07-11 23:40:45,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:40:45,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 609056934, now seen corresponding path program 1 times [2022-07-11 23:40:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819429417] [2022-07-11 23:40:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:40:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819429417] [2022-07-11 23:40:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819429417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:45,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:45,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:40:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003629108] [2022-07-11 23:40:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:40:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:40:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:45,872 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) [2022-07-11 23:40:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:45,913 INFO L93 Difference]: Finished difference Result 699 states and 912 transitions. [2022-07-11 23:40:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:45,914 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 [2022-07-11 23:40:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:45,915 INFO L225 Difference]: With dead ends: 699 [2022-07-11 23:40:45,916 INFO L226 Difference]: Without dead ends: 673 [2022-07-11 23:40:45,916 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 [2022-07-11 23:40:45,916 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 [2022-07-11 23:40:45,917 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] [2022-07-11 23:40:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-11 23:40:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 567. [2022-07-11 23:40:45,932 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) [2022-07-11 23:40:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 744 transitions. [2022-07-11 23:40:45,934 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 744 transitions. Word has length 52 [2022-07-11 23:40:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:45,934 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 744 transitions. [2022-07-11 23:40:45,934 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) [2022-07-11 23:40:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 744 transitions. [2022-07-11 23:40:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:40:45,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:45,935 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] [2022-07-11 23:40:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:40:45,936 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -616078268, now seen corresponding path program 1 times [2022-07-11 23:40:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476239505] [2022-07-11 23:40:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:40:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:46,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476239505] [2022-07-11 23:40:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476239505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:46,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:46,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:40:46,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297809721] [2022-07-11 23:40:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:40:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:40:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:40:46,027 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) [2022-07-11 23:40:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:46,216 INFO L93 Difference]: Finished difference Result 1253 states and 1665 transitions. [2022-07-11 23:40:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:46,217 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 [2022-07-11 23:40:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:46,220 INFO L225 Difference]: With dead ends: 1253 [2022-07-11 23:40:46,220 INFO L226 Difference]: Without dead ends: 1047 [2022-07-11 23:40:46,221 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 [2022-07-11 23:40:46,221 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 [2022-07-11 23:40:46,221 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] [2022-07-11 23:40:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-07-11 23:40:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 916. [2022-07-11 23:40:46,246 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) [2022-07-11 23:40:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1191 transitions. [2022-07-11 23:40:46,249 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1191 transitions. Word has length 57 [2022-07-11 23:40:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:46,249 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1191 transitions. [2022-07-11 23:40:46,249 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) [2022-07-11 23:40:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1191 transitions. [2022-07-11 23:40:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:40:46,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:46,250 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] [2022-07-11 23:40:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:40:46,251 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2036483645, now seen corresponding path program 1 times [2022-07-11 23:40:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894271785] [2022-07-11 23:40:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894271785] [2022-07-11 23:40:46,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894271785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564154582] [2022-07-11 23:40:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:46,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:46,302 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) [2022-07-11 23:40:46,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:40:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:40:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:46,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564154582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:46,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:46,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-11 23:40:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574225704] [2022-07-11 23:40:46,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:46,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:40:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:40:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:40:46,483 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) [2022-07-11 23:40:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:46,725 INFO L93 Difference]: Finished difference Result 1645 states and 2145 transitions. [2022-07-11 23:40:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:40:46,726 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 [2022-07-11 23:40:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:46,730 INFO L225 Difference]: With dead ends: 1645 [2022-07-11 23:40:46,730 INFO L226 Difference]: Without dead ends: 1543 [2022-07-11 23:40:46,731 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 [2022-07-11 23:40:46,731 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 [2022-07-11 23:40:46,732 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] [2022-07-11 23:40:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-07-11 23:40:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 928. [2022-07-11 23:40:46,759 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) [2022-07-11 23:40:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1205 transitions. [2022-07-11 23:40:46,761 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1205 transitions. Word has length 58 [2022-07-11 23:40:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:46,762 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1205 transitions. [2022-07-11 23:40:46,762 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) [2022-07-11 23:40:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1205 transitions. [2022-07-11 23:40:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:40:46,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:46,763 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] [2022-07-11 23:40:46,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:46,979 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 [2022-07-11 23:40:46,980 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2124470145, now seen corresponding path program 1 times [2022-07-11 23:40:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:46,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242439167] [2022-07-11 23:40:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:40:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242439167] [2022-07-11 23:40:47,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242439167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595246878] [2022-07-11 23:40:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:47,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:47,036 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) [2022-07-11 23:40:47,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:40:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:40:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:47,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:47,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595246878] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:47,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:47,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-11 23:40:47,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705483158] [2022-07-11 23:40:47,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:40:47,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:40:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:40:47,238 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) [2022-07-11 23:40:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:47,517 INFO L93 Difference]: Finished difference Result 2168 states and 2878 transitions. [2022-07-11 23:40:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:40:47,518 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 [2022-07-11 23:40:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:47,523 INFO L225 Difference]: With dead ends: 2168 [2022-07-11 23:40:47,523 INFO L226 Difference]: Without dead ends: 2046 [2022-07-11 23:40:47,524 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 [2022-07-11 23:40:47,524 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 [2022-07-11 23:40:47,524 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] [2022-07-11 23:40:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-11 23:40:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 908. [2022-07-11 23:40:47,556 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) [2022-07-11 23:40:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1179 transitions. [2022-07-11 23:40:47,558 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1179 transitions. Word has length 58 [2022-07-11 23:40:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:47,558 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1179 transitions. [2022-07-11 23:40:47,558 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) [2022-07-11 23:40:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1179 transitions. [2022-07-11 23:40:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:40:47,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:47,559 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] [2022-07-11 23:40:47,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:47,775 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 [2022-07-11 23:40:47,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash 581962179, now seen corresponding path program 1 times [2022-07-11 23:40:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:47,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101793548] [2022-07-11 23:40:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:40:47,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101793548] [2022-07-11 23:40:47,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101793548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:47,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:47,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:40:47,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407095393] [2022-07-11 23:40:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:47,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:40:47,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:40:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:40:47,816 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) [2022-07-11 23:40:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:47,910 INFO L93 Difference]: Finished difference Result 958 states and 1239 transitions. [2022-07-11 23:40:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:47,911 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 [2022-07-11 23:40:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:47,914 INFO L225 Difference]: With dead ends: 958 [2022-07-11 23:40:47,914 INFO L226 Difference]: Without dead ends: 752 [2022-07-11 23:40:47,915 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 [2022-07-11 23:40:47,916 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 [2022-07-11 23:40:47,916 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] [2022-07-11 23:40:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-11 23:40:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2022-07-11 23:40:47,938 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) [2022-07-11 23:40:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 968 transitions. [2022-07-11 23:40:47,939 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 968 transitions. Word has length 58 [2022-07-11 23:40:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 968 transitions. [2022-07-11 23:40:47,940 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) [2022-07-11 23:40:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 968 transitions. [2022-07-11 23:40:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:40:47,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:47,941 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] [2022-07-11 23:40:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:40:47,941 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash -751105251, now seen corresponding path program 1 times [2022-07-11 23:40:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051531670] [2022-07-11 23:40:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:47,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 23:40:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:47,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051531670] [2022-07-11 23:40:47,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051531670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:47,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:40:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560383371] [2022-07-11 23:40:47,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:40:47,973 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) [2022-07-11 23:40:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:48,039 INFO L93 Difference]: Finished difference Result 1373 states and 1800 transitions. [2022-07-11 23:40:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:48,041 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 [2022-07-11 23:40:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:48,043 INFO L225 Difference]: With dead ends: 1373 [2022-07-11 23:40:48,043 INFO L226 Difference]: Without dead ends: 764 [2022-07-11 23:40:48,044 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 [2022-07-11 23:40:48,044 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 [2022-07-11 23:40:48,045 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] [2022-07-11 23:40:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-11 23:40:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 745. [2022-07-11 23:40:48,066 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) [2022-07-11 23:40:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 969 transitions. [2022-07-11 23:40:48,067 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 969 transitions. Word has length 59 [2022-07-11 23:40:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:48,068 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 969 transitions. [2022-07-11 23:40:48,068 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) [2022-07-11 23:40:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 969 transitions. [2022-07-11 23:40:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:40:48,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:48,069 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] [2022-07-11 23:40:48,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:40:48,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -936842692, now seen corresponding path program 1 times [2022-07-11 23:40:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242153899] [2022-07-11 23:40:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-11 23:40:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242153899] [2022-07-11 23:40:48,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242153899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017893463] [2022-07-11 23:40:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:48,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:48,175 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) [2022-07-11 23:40:48,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:40:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 23:40:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:40:48,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017893463] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:48,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:40:48,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 26 [2022-07-11 23:40:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755691171] [2022-07-11 23:40:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:40:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:40:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:40:48,853 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) [2022-07-11 23:40:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:49,214 INFO L93 Difference]: Finished difference Result 1182 states and 1539 transitions. [2022-07-11 23:40:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:40:49,215 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 [2022-07-11 23:40:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:49,218 INFO L225 Difference]: With dead ends: 1182 [2022-07-11 23:40:49,218 INFO L226 Difference]: Without dead ends: 1147 [2022-07-11 23:40:49,218 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 [2022-07-11 23:40:49,219 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 [2022-07-11 23:40:49,219 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] [2022-07-11 23:40:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-11 23:40:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1000. [2022-07-11 23:40:49,253 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) [2022-07-11 23:40:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1311 transitions. [2022-07-11 23:40:49,255 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1311 transitions. Word has length 60 [2022-07-11 23:40:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:49,256 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1311 transitions. [2022-07-11 23:40:49,256 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) [2022-07-11 23:40:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1311 transitions. [2022-07-11 23:40:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:40:49,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:49,257 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] [2022-07-11 23:40:49,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:49,467 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 [2022-07-11 23:40:49,468 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash 778111170, now seen corresponding path program 1 times [2022-07-11 23:40:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:49,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124259324] [2022-07-11 23:40:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:49,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-11 23:40:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:40:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:49,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124259324] [2022-07-11 23:40:49,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124259324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:49,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:49,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:40:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696864598] [2022-07-11 23:40:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:40:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:40:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:40:49,524 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) [2022-07-11 23:40:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:49,619 INFO L93 Difference]: Finished difference Result 1038 states and 1359 transitions. [2022-07-11 23:40:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:49,620 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 [2022-07-11 23:40:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:49,622 INFO L225 Difference]: With dead ends: 1038 [2022-07-11 23:40:49,623 INFO L226 Difference]: Without dead ends: 1034 [2022-07-11 23:40:49,623 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 [2022-07-11 23:40:49,624 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 [2022-07-11 23:40:49,624 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] [2022-07-11 23:40:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-07-11 23:40:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 995. [2022-07-11 23:40:49,657 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) [2022-07-11 23:40:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1303 transitions. [2022-07-11 23:40:49,659 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1303 transitions. Word has length 62 [2022-07-11 23:40:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1303 transitions. [2022-07-11 23:40:49,659 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) [2022-07-11 23:40:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1303 transitions. [2022-07-11 23:40:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:40:49,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:49,661 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] [2022-07-11 23:40:49,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:40:49,661 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash 835369472, now seen corresponding path program 1 times [2022-07-11 23:40:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:49,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440968187] [2022-07-11 23:40:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-11 23:40:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:40:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440968187] [2022-07-11 23:40:49,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440968187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:49,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:49,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:40:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386421344] [2022-07-11 23:40:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:40:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:40:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:40:49,704 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) [2022-07-11 23:40:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:49,780 INFO L93 Difference]: Finished difference Result 1028 states and 1344 transitions. [2022-07-11 23:40:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:40:49,780 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 [2022-07-11 23:40:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:49,783 INFO L225 Difference]: With dead ends: 1028 [2022-07-11 23:40:49,783 INFO L226 Difference]: Without dead ends: 1014 [2022-07-11 23:40:49,784 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 [2022-07-11 23:40:49,784 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 [2022-07-11 23:40:49,787 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] [2022-07-11 23:40:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-11 23:40:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 980. [2022-07-11 23:40:49,823 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) [2022-07-11 23:40:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1276 transitions. [2022-07-11 23:40:49,825 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1276 transitions. Word has length 62 [2022-07-11 23:40:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:49,825 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1276 transitions. [2022-07-11 23:40:49,826 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) [2022-07-11 23:40:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1276 transitions. [2022-07-11 23:40:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:40:49,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:49,828 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] [2022-07-11 23:40:49,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:40:49,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1459442409, now seen corresponding path program 1 times [2022-07-11 23:40:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687476717] [2022-07-11 23:40:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-11 23:40:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:49,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687476717] [2022-07-11 23:40:49,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687476717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:49,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773466134] [2022-07-11 23:40:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:49,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:49,952 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) [2022-07-11 23:40:49,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:40:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 23:40:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:40:50,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:40:50,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773466134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:50,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:40:50,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-11 23:40:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92462122] [2022-07-11 23:40:50,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:50,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:40:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:40:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:40:50,131 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) [2022-07-11 23:40:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:50,331 INFO L93 Difference]: Finished difference Result 1229 states and 1614 transitions. [2022-07-11 23:40:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:40:50,332 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 [2022-07-11 23:40:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:50,335 INFO L225 Difference]: With dead ends: 1229 [2022-07-11 23:40:50,335 INFO L226 Difference]: Without dead ends: 1213 [2022-07-11 23:40:50,335 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 [2022-07-11 23:40:50,336 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 [2022-07-11 23:40:50,336 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] [2022-07-11 23:40:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-11 23:40:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 980. [2022-07-11 23:40:50,368 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) [2022-07-11 23:40:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1274 transitions. [2022-07-11 23:40:50,369 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1274 transitions. Word has length 62 [2022-07-11 23:40:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:50,370 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1274 transitions. [2022-07-11 23:40:50,370 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) [2022-07-11 23:40:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1274 transitions. [2022-07-11 23:40:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:40:50,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:50,371 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] [2022-07-11 23:40:50,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:50,591 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 [2022-07-11 23:40:50,591 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1430736848, now seen corresponding path program 1 times [2022-07-11 23:40:50,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:50,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305991993] [2022-07-11 23:40:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:50,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:50,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:50,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:50,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305991993] [2022-07-11 23:40:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305991993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:50,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:50,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-11 23:40:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140143733] [2022-07-11 23:40:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:50,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:40:50,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:40:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:40:50,686 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) [2022-07-11 23:40:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:50,956 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-07-11 23:40:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:40:50,957 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 [2022-07-11 23:40:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:50,960 INFO L225 Difference]: With dead ends: 1566 [2022-07-11 23:40:50,960 INFO L226 Difference]: Without dead ends: 1112 [2022-07-11 23:40:50,961 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 [2022-07-11 23:40:50,961 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 [2022-07-11 23:40:50,961 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] [2022-07-11 23:40:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-07-11 23:40:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1055. [2022-07-11 23:40:51,002 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) [2022-07-11 23:40:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1346 transitions. [2022-07-11 23:40:51,003 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1346 transitions. Word has length 62 [2022-07-11 23:40:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1346 transitions. [2022-07-11 23:40:51,004 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) [2022-07-11 23:40:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1346 transitions. [2022-07-11 23:40:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:40:51,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:51,005 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] [2022-07-11 23:40:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:40:51,005 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1428889806, now seen corresponding path program 1 times [2022-07-11 23:40:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590373442] [2022-07-11 23:40:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:40:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:51,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590373442] [2022-07-11 23:40:51,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590373442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:51,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:51,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-11 23:40:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770588368] [2022-07-11 23:40:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:51,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:40:51,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:40:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:40:51,168 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) [2022-07-11 23:40:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:51,637 INFO L93 Difference]: Finished difference Result 1118 states and 1421 transitions. [2022-07-11 23:40:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:40:51,638 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 [2022-07-11 23:40:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:51,640 INFO L225 Difference]: With dead ends: 1118 [2022-07-11 23:40:51,641 INFO L226 Difference]: Without dead ends: 1116 [2022-07-11 23:40:51,641 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 [2022-07-11 23:40:51,641 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 [2022-07-11 23:40:51,642 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] [2022-07-11 23:40:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-11 23:40:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1065. [2022-07-11 23:40:51,678 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) [2022-07-11 23:40:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1356 transitions. [2022-07-11 23:40:51,679 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1356 transitions. Word has length 62 [2022-07-11 23:40:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:51,679 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1356 transitions. [2022-07-11 23:40:51,679 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) [2022-07-11 23:40:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1356 transitions. [2022-07-11 23:40:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:51,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:51,681 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] [2022-07-11 23:40:51,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:40:51,681 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:51,682 INFO L85 PathProgramCache]: Analyzing trace with hash -900886980, now seen corresponding path program 1 times [2022-07-11 23:40:51,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:51,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693221915] [2022-07-11 23:40:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:40:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:51,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693221915] [2022-07-11 23:40:51,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693221915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95940451] [2022-07-11 23:40:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:51,767 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) [2022-07-11 23:40:51,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:40:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:40:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:51,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95940451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:51,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:51,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-11 23:40:51,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104376219] [2022-07-11 23:40:51,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:51,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:40:51,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:40:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:40:51,898 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) [2022-07-11 23:40:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:52,179 INFO L93 Difference]: Finished difference Result 3170 states and 4096 transitions. [2022-07-11 23:40:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:40:52,180 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 [2022-07-11 23:40:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:52,186 INFO L225 Difference]: With dead ends: 3170 [2022-07-11 23:40:52,186 INFO L226 Difference]: Without dead ends: 2732 [2022-07-11 23:40:52,188 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 [2022-07-11 23:40:52,191 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:52,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1577 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:40:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2022-07-11 23:40:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1170. [2022-07-11 23:40:52,237 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) [2022-07-11 23:40:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1485 transitions. [2022-07-11 23:40:52,239 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1485 transitions. Word has length 65 [2022-07-11 23:40:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:52,239 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1485 transitions. [2022-07-11 23:40:52,239 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) [2022-07-11 23:40:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1485 transitions. [2022-07-11 23:40:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:52,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:52,241 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] [2022-07-11 23:40:52,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:52,455 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 [2022-07-11 23:40:52,456 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1705136574, now seen corresponding path program 1 times [2022-07-11 23:40:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:52,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072240866] [2022-07-11 23:40:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:52,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:40:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:52,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072240866] [2022-07-11 23:40:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072240866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997129522] [2022-07-11 23:40:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:52,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:52,501 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) [2022-07-11 23:40:52,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:40:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:40:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:40:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:40:52,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997129522] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:52,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:52,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-07-11 23:40:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928971330] [2022-07-11 23:40:52,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 23:40:52,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 23:40:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-11 23:40:52,771 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) [2022-07-11 23:40:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:53,368 INFO L93 Difference]: Finished difference Result 3318 states and 4313 transitions. [2022-07-11 23:40:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 23:40:53,368 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 [2022-07-11 23:40:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:53,375 INFO L225 Difference]: With dead ends: 3318 [2022-07-11 23:40:53,375 INFO L226 Difference]: Without dead ends: 2835 [2022-07-11 23:40:53,377 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 [2022-07-11 23:40:53,377 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 [2022-07-11 23:40:53,377 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] [2022-07-11 23:40:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-11 23:40:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1230. [2022-07-11 23:40:53,437 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) [2022-07-11 23:40:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1562 transitions. [2022-07-11 23:40:53,439 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1562 transitions. Word has length 65 [2022-07-11 23:40:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:53,439 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1562 transitions. [2022-07-11 23:40:53,439 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) [2022-07-11 23:40:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1562 transitions. [2022-07-11 23:40:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:53,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:53,441 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] [2022-07-11 23:40:53,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:53,655 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 [2022-07-11 23:40:53,655 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -766873474, now seen corresponding path program 1 times [2022-07-11 23:40:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525212955] [2022-07-11 23:40:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:40:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525212955] [2022-07-11 23:40:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525212955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860148120] [2022-07-11 23:40:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:53,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:53,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:53,762 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) [2022-07-11 23:40:53,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:40:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:40:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860148120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:53,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-11 23:40:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453052382] [2022-07-11 23:40:53,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:40:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:40:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:40:53,920 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) [2022-07-11 23:40:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:54,392 INFO L93 Difference]: Finished difference Result 3599 states and 4776 transitions. [2022-07-11 23:40:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:40:54,393 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 [2022-07-11 23:40:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:54,401 INFO L225 Difference]: With dead ends: 3599 [2022-07-11 23:40:54,403 INFO L226 Difference]: Without dead ends: 3274 [2022-07-11 23:40:54,404 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 [2022-07-11 23:40:54,404 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 [2022-07-11 23:40:54,405 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] [2022-07-11 23:40:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-07-11 23:40:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1356. [2022-07-11 23:40:54,466 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) [2022-07-11 23:40:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1706 transitions. [2022-07-11 23:40:54,468 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1706 transitions. Word has length 65 [2022-07-11 23:40:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:54,468 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1706 transitions. [2022-07-11 23:40:54,468 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) [2022-07-11 23:40:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1706 transitions. [2022-07-11 23:40:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:54,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:54,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:40:54,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:54,690 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 [2022-07-11 23:40:54,690 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1161747526, now seen corresponding path program 1 times [2022-07-11 23:40:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918812165] [2022-07-11 23:40:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:54,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:40:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918812165] [2022-07-11 23:40:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918812165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674997963] [2022-07-11 23:40:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:54,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:54,758 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) [2022-07-11 23:40:54,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:40:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:54,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:40:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:40:54,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:40:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:40:55,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674997963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:40:55,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:40:55,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-11 23:40:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7286149] [2022-07-11 23:40:55,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:40:55,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 23:40:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 23:40:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:40:55,048 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) [2022-07-11 23:40:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:55,894 INFO L93 Difference]: Finished difference Result 4186 states and 5525 transitions. [2022-07-11 23:40:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 23:40:55,899 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 [2022-07-11 23:40:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:55,907 INFO L225 Difference]: With dead ends: 4186 [2022-07-11 23:40:55,907 INFO L226 Difference]: Without dead ends: 3598 [2022-07-11 23:40:55,910 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 [2022-07-11 23:40:55,912 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 [2022-07-11 23:40:55,914 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] [2022-07-11 23:40:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-11 23:40:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 1272. [2022-07-11 23:40:55,977 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) [2022-07-11 23:40:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1603 transitions. [2022-07-11 23:40:55,978 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1603 transitions. Word has length 65 [2022-07-11 23:40:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:55,979 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1603 transitions. [2022-07-11 23:40:55,979 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) [2022-07-11 23:40:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1603 transitions. [2022-07-11 23:40:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:55,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:55,981 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] [2022-07-11 23:40:55,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:56,189 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 [2022-07-11 23:40:56,189 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1795236595, now seen corresponding path program 1 times [2022-07-11 23:40:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:56,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638929089] [2022-07-11 23:40:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:40:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:40:56,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638929089] [2022-07-11 23:40:56,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638929089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956771195] [2022-07-11 23:40:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:56,245 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) [2022-07-11 23:40:56,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:40:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:40:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:40:56,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:40:56,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956771195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:56,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:40:56,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-11 23:40:56,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525632605] [2022-07-11 23:40:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:56,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:40:56,312 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) [2022-07-11 23:40:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:56,403 INFO L93 Difference]: Finished difference Result 2435 states and 3101 transitions. [2022-07-11 23:40:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:40:56,404 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 [2022-07-11 23:40:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:56,416 INFO L225 Difference]: With dead ends: 2435 [2022-07-11 23:40:56,416 INFO L226 Difference]: Without dead ends: 1306 [2022-07-11 23:40:56,417 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 [2022-07-11 23:40:56,418 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:56,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 382 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:40:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-07-11 23:40:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1281. [2022-07-11 23:40:56,459 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) [2022-07-11 23:40:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1615 transitions. [2022-07-11 23:40:56,461 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1615 transitions. Word has length 65 [2022-07-11 23:40:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:56,461 INFO L495 AbstractCegarLoop]: Abstraction has 1281 states and 1615 transitions. [2022-07-11 23:40:56,461 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) [2022-07-11 23:40:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1615 transitions. [2022-07-11 23:40:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:56,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:56,463 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] [2022-07-11 23:40:56,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:56,679 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 [2022-07-11 23:40:56,679 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1045451834, now seen corresponding path program 2 times [2022-07-11 23:40:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589307617] [2022-07-11 23:40:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589307617] [2022-07-11 23:40:56,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589307617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:56,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:56,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:40:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23766864] [2022-07-11 23:40:56,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:40:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:40:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:40:56,748 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) [2022-07-11 23:40:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:57,081 INFO L93 Difference]: Finished difference Result 2456 states and 3190 transitions. [2022-07-11 23:40:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:40:57,082 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 [2022-07-11 23:40:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:57,085 INFO L225 Difference]: With dead ends: 2456 [2022-07-11 23:40:57,085 INFO L226 Difference]: Without dead ends: 2247 [2022-07-11 23:40:57,086 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 [2022-07-11 23:40:57,087 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 [2022-07-11 23:40:57,087 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] [2022-07-11 23:40:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-07-11 23:40:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1434. [2022-07-11 23:40:57,135 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) [2022-07-11 23:40:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1792 transitions. [2022-07-11 23:40:57,137 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1792 transitions. Word has length 65 [2022-07-11 23:40:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:57,137 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1792 transitions. [2022-07-11 23:40:57,137 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) [2022-07-11 23:40:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1792 transitions. [2022-07-11 23:40:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:40:57,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:57,139 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] [2022-07-11 23:40:57,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:40:57,139 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 650577782, now seen corresponding path program 1 times [2022-07-11 23:40:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856545283] [2022-07-11 23:40:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:40:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856545283] [2022-07-11 23:40:57,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856545283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:57,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:40:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:40:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065191461] [2022-07-11 23:40:57,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:57,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:40:57,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:40:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:40:57,184 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) [2022-07-11 23:40:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:57,507 INFO L93 Difference]: Finished difference Result 2768 states and 3578 transitions. [2022-07-11 23:40:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:40:57,508 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 [2022-07-11 23:40:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:57,511 INFO L225 Difference]: With dead ends: 2768 [2022-07-11 23:40:57,511 INFO L226 Difference]: Without dead ends: 2306 [2022-07-11 23:40:57,512 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 [2022-07-11 23:40:57,512 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:40:57,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 948 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:40:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-07-11 23:40:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1432. [2022-07-11 23:40:57,562 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) [2022-07-11 23:40:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1787 transitions. [2022-07-11 23:40:57,564 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1787 transitions. Word has length 65 [2022-07-11 23:40:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:57,565 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 1787 transitions. [2022-07-11 23:40:57,565 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) [2022-07-11 23:40:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1787 transitions. [2022-07-11 23:40:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:40:57,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:57,566 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] [2022-07-11 23:40:57,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:40:57,567 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash -825997882, now seen corresponding path program 1 times [2022-07-11 23:40:57,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:57,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090099186] [2022-07-11 23:40:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:57,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:40:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:40:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-11 23:40:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:40:57,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:40:57,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090099186] [2022-07-11 23:40:57,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090099186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:40:57,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379946105] [2022-07-11 23:40:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:57,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:40:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:40:57,587 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) [2022-07-11 23:40:57,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:40:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:40:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:40:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:40:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:40:57,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:40:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379946105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:40:57,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:40:57,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-11 23:40:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538507949] [2022-07-11 23:40:57,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:40:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:40:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:40:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:40:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:40:57,649 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) [2022-07-11 23:40:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:40:57,717 INFO L93 Difference]: Finished difference Result 2428 states and 3037 transitions. [2022-07-11 23:40:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:40:57,718 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 [2022-07-11 23:40:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:40:57,720 INFO L225 Difference]: With dead ends: 2428 [2022-07-11 23:40:57,720 INFO L226 Difference]: Without dead ends: 1443 [2022-07-11 23:40:57,722 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 [2022-07-11 23:40:57,722 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 [2022-07-11 23:40:57,722 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] [2022-07-11 23:40:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-07-11 23:40:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2022-07-11 23:40:57,777 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) [2022-07-11 23:40:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1789 transitions. [2022-07-11 23:40:57,778 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1789 transitions. Word has length 66 [2022-07-11 23:40:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:40:57,779 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1789 transitions. [2022-07-11 23:40:57,779 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) [2022-07-11 23:40:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1789 transitions. [2022-07-11 23:40:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:40:57,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:40:57,783 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] [2022-07-11 23:40:57,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:40:57,987 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 [2022-07-11 23:40:57,987 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:40:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:40:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2048501975, now seen corresponding path program 1 times [2022-07-11 23:40:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:40:57,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120412444] [2022-07-11 23:40:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:40:57,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:40:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 23:40:58,030 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-11 23:40:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 23:40:58,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-11 23:40:58,079 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-11 23:40:58,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:40:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:40:58,084 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] [2022-07-11 23:40:58,086 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-11 23:40:58,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 11:40:58 BoogieIcfgContainer [2022-07-11 23:40:58,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-11 23:40:58,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-11 23:40:58,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-11 23:40:58,144 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-11 23:40:58,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:40:38" (3/4) ... [2022-07-11 23:40:58,146 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-11 23:40:58,146 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-11 23:40:58,146 INFO L158 Benchmark]: Toolchain (without parser) took 20253.22ms. Allocated memory was 109.1MB in the beginning and 346.0MB in the end (delta: 237.0MB). Free memory was 80.8MB in the beginning and 312.7MB in the end (delta: -231.9MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory was 64.1MB in the beginning and 64.0MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.72ms. Allocated memory is still 109.1MB. Free memory was 80.5MB in the beginning and 79.1MB in the end (delta: 1.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.36ms. Allocated memory is still 109.1MB. Free memory was 79.1MB in the beginning and 76.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: Boogie Preprocessor took 47.18ms. Allocated memory is still 109.1MB. Free memory was 76.7MB in the beginning and 75.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: RCFGBuilder took 625.49ms. Allocated memory is still 109.1MB. Free memory was 75.0MB in the beginning and 55.1MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: TraceAbstraction took 19179.32ms. Allocated memory was 148.9MB in the beginning and 346.0MB in the end (delta: 197.1MB). Free memory was 124.8MB in the beginning and 312.7MB in the end (delta: -188.0MB). Peak memory consumption was 208.9MB. Max. memory is 16.1GB. [2022-07-11 23:40:58,147 INFO L158 Benchmark]: Witness Printer took 2.38ms. Allocated memory is still 346.0MB. Free memory is still 312.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:40:58,148 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory was 64.1MB in the beginning and 64.0MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.72ms. Allocated memory is still 109.1MB. Free memory was 80.5MB in the beginning and 79.1MB in the end (delta: 1.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.36ms. Allocated memory is still 109.1MB. Free memory was 79.1MB in the beginning and 76.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.18ms. Allocated memory is still 109.1MB. Free memory was 76.7MB in the beginning and 75.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 625.49ms. Allocated memory is still 109.1MB. Free memory was 75.0MB in the beginning and 55.1MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 19179.32ms. Allocated memory was 148.9MB in the beginning and 346.0MB in the end (delta: 197.1MB). Free memory was 124.8MB in the beginning and 312.7MB in the end (delta: -188.0MB). Peak memory consumption was 208.9MB. Max. memory is 16.1GB. * Witness Printer took 2.38ms. Allocated memory is still 346.0MB. Free memory is still 312.7MB. 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: 19.1s, OverallIterations: 37, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8140 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7974 mSDsluCounter, 39287 SdHoareTripleChecker+Invalid, 3.6s 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, 3.4s 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, 4.9s 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 [2022-07-11 23:40:58,160 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-?-6c24879 [2022-07-11 23:40:59,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:40:59,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:40:59,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:40:59,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:40:59,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:40:59,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:40:59,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:40:59,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:40:59,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:40:59,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:40:59,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:40:59,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:40:59,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:40:59,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:40:59,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:40:59,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:40:59,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:40:59,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:40:59,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:40:59,850 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:40:59,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:40:59,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:40:59,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:40:59,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:40:59,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:40:59,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:40:59,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:40:59,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:40:59,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:40:59,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:40:59,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:40:59,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:40:59,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:40:59,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:40:59,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:40:59,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:40:59,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:40:59,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:40:59,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:40:59,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:40:59,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:40:59,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-11 23:40:59,895 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:40:59,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:40:59,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:40:59,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:40:59,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:40:59,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:40:59,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:40:59,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:40:59,898 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:40:59,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:40:59,898 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-11 23:40:59,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:40:59,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:40:59,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:40:59,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:40:59,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:40:59,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:40:59,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:40:59,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:40:59,901 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-11 23:40:59,902 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-11 23:40:59,902 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:40:59,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:40:59,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:40:59,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-11 23:40:59,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-07-11 23:41:00,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:41:00,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:41:00,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:41:00,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:41:00,198 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:41:00,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-11 23:41:00,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b17328db/5796c361509b4b0e84333db50ce96088/FLAG6e55bdcaa [2022-07-11 23:41:00,624 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:41:00,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-07-11 23:41:00,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b17328db/5796c361509b4b0e84333db50ce96088/FLAG6e55bdcaa [2022-07-11 23:41:00,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b17328db/5796c361509b4b0e84333db50ce96088 [2022-07-11 23:41:00,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:41:00,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:41:00,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:41:00,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:41:00,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:41:00,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc5b462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00, skipping insertion in model container [2022-07-11 23:41:00,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:41:00,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:41:00,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-07-11 23:41:00,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:41:00,852 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:41:00,872 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] [2022-07-11 23:41:00,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:41:00,908 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:41:00,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00 WrapperNode [2022-07-11 23:41:00,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:41:00,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:41:00,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:41:00,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:41:00,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,937 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2022-07-11 23:41:00,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:41:00,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:41:00,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:41:00,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:41:00,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:41:00,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:41:00,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:41:00,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:41:00,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:41:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:01,001 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) [2022-07-11 23:41:01,007 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 [2022-07-11 23:41:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:41:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-11 23:41:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-11 23:41:01,044 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-11 23:41:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:41:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:41:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-11 23:41:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-11 23:41:01,118 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:41:01,119 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:41:01,385 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:41:01,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:41:01,390 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 23:41:01,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:41:01 BoogieIcfgContainer [2022-07-11 23:41:01,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:41:01,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:41:01,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:41:01,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:41:01,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:41:00" (1/3) ... [2022-07-11 23:41:01,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956ff2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:41:01, skipping insertion in model container [2022-07-11 23:41:01,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (2/3) ... [2022-07-11 23:41:01,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956ff2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:41:01, skipping insertion in model container [2022-07-11 23:41:01,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:41:01" (3/3) ... [2022-07-11 23:41:01,396 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-07-11 23:41:01,405 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:41:01,405 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:41:01,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:41:01,457 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@d6f5c81, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@75ac8bfb [2022-07-11 23:41:01,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:41:01,462 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) [2022-07-11 23:41:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:41:01,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:01,469 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] [2022-07-11 23:41:01,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2022-07-11 23:41:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220832486] [2022-07-11 23:41:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:01,487 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) [2022-07-11 23:41:01,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-11 23:41:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:01,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:01,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:01,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220832486] [2022-07-11 23:41:01,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220832486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:01,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:01,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-11 23:41:01,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706966394] [2022-07-11 23:41:01,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:01,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:01,779 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) [2022-07-11 23:41:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:01,888 INFO L93 Difference]: Finished difference Result 194 states and 322 transitions. [2022-07-11 23:41:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:01,891 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 [2022-07-11 23:41:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:01,902 INFO L225 Difference]: With dead ends: 194 [2022-07-11 23:41:01,902 INFO L226 Difference]: Without dead ends: 117 [2022-07-11 23:41:01,905 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 [2022-07-11 23:41:01,908 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:01,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 753 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:41:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-11 23:41:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2022-07-11 23:41:01,942 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) [2022-07-11 23:41:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 120 transitions. [2022-07-11 23:41:01,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 120 transitions. Word has length 32 [2022-07-11 23:41:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:01,945 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 120 transitions. [2022-07-11 23:41:01,945 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) [2022-07-11 23:41:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 120 transitions. [2022-07-11 23:41:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:41:01,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:01,947 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] [2022-07-11 23:41:01,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-11 23:41:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:02,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 975798983, now seen corresponding path program 1 times [2022-07-11 23:41:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:02,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306967106] [2022-07-11 23:41:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:02,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:02,160 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) [2022-07-11 23:41:02,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-11 23:41:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:02,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:02,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306967106] [2022-07-11 23:41:02,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306967106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:02,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:02,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272073427] [2022-07-11 23:41:02,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:02,252 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) [2022-07-11 23:41:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:02,333 INFO L93 Difference]: Finished difference Result 169 states and 257 transitions. [2022-07-11 23:41:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:02,334 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 [2022-07-11 23:41:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:02,335 INFO L225 Difference]: With dead ends: 169 [2022-07-11 23:41:02,336 INFO L226 Difference]: Without dead ends: 127 [2022-07-11 23:41:02,337 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 [2022-07-11 23:41:02,338 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-11 23:41:02,338 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] [2022-07-11 23:41:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-11 23:41:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-07-11 23:41:02,362 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) [2022-07-11 23:41:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 185 transitions. [2022-07-11 23:41:02,363 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 185 transitions. Word has length 36 [2022-07-11 23:41:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 185 transitions. [2022-07-11 23:41:02,364 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) [2022-07-11 23:41:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 185 transitions. [2022-07-11 23:41:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:41:02,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:02,365 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] [2022-07-11 23:41:02,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:02,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:02,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1655857353, now seen corresponding path program 1 times [2022-07-11 23:41:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:02,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961619253] [2022-07-11 23:41:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:02,578 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) [2022-07-11 23:41:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-11 23:41:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:41:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:02,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:02,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961619253] [2022-07-11 23:41:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961619253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:02,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:02,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:41:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754562912] [2022-07-11 23:41:02,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:02,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:41:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:41:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:41:02,697 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) [2022-07-11 23:41:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:02,800 INFO L93 Difference]: Finished difference Result 180 states and 272 transitions. [2022-07-11 23:41:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:02,801 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 [2022-07-11 23:41:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:02,802 INFO L225 Difference]: With dead ends: 180 [2022-07-11 23:41:02,819 INFO L226 Difference]: Without dead ends: 141 [2022-07-11 23:41:02,820 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 [2022-07-11 23:41:02,820 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 105 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-11 23:41:02,821 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] [2022-07-11 23:41:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-11 23:41:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2022-07-11 23:41:02,835 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) [2022-07-11 23:41:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2022-07-11 23:41:02,842 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 36 [2022-07-11 23:41:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:02,842 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2022-07-11 23:41:02,842 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) [2022-07-11 23:41:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2022-07-11 23:41:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:41:02,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:02,844 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] [2022-07-11 23:41:02,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash -371678158, now seen corresponding path program 1 times [2022-07-11 23:41:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429765029] [2022-07-11 23:41:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:03,053 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) [2022-07-11 23:41:03,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-11 23:41:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:41:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:03,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:03,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:03,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429765029] [2022-07-11 23:41:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429765029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:03,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-11 23:41:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415365284] [2022-07-11 23:41:03,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:41:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:41:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:41:03,217 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) [2022-07-11 23:41:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:03,367 INFO L93 Difference]: Finished difference Result 312 states and 474 transitions. [2022-07-11 23:41:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:41:03,369 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 [2022-07-11 23:41:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:03,370 INFO L225 Difference]: With dead ends: 312 [2022-07-11 23:41:03,370 INFO L226 Difference]: Without dead ends: 237 [2022-07-11 23:41:03,371 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 [2022-07-11 23:41:03,381 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 [2022-07-11 23:41:03,382 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] [2022-07-11 23:41:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-11 23:41:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2022-07-11 23:41:03,397 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) [2022-07-11 23:41:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2022-07-11 23:41:03,398 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2022-07-11 23:41:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:03,399 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2022-07-11 23:41:03,399 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) [2022-07-11 23:41:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2022-07-11 23:41:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:41:03,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:03,400 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] [2022-07-11 23:41:03,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2022-07-11 23:41:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843549026] [2022-07-11 23:41:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:03,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:03,607 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) [2022-07-11 23:41:03,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-11 23:41:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:03,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:03,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843549026] [2022-07-11 23:41:03,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843549026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:03,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:03,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:03,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718224606] [2022-07-11 23:41:03,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:03,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:03,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:03,689 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) [2022-07-11 23:41:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:03,739 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-07-11 23:41:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:03,739 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 [2022-07-11 23:41:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:03,741 INFO L225 Difference]: With dead ends: 331 [2022-07-11 23:41:03,741 INFO L226 Difference]: Without dead ends: 265 [2022-07-11 23:41:03,742 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 [2022-07-11 23:41:03,742 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 [2022-07-11 23:41:03,743 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] [2022-07-11 23:41:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-11 23:41:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-07-11 23:41:03,754 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) [2022-07-11 23:41:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 327 transitions. [2022-07-11 23:41:03,756 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 327 transitions. Word has length 43 [2022-07-11 23:41:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:03,756 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 327 transitions. [2022-07-11 23:41:03,756 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) [2022-07-11 23:41:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 327 transitions. [2022-07-11 23:41:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:41:03,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:03,758 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] [2022-07-11 23:41:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1847325628, now seen corresponding path program 1 times [2022-07-11 23:41:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624824390] [2022-07-11 23:41:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:03,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:03,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:03,969 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) [2022-07-11 23:41:03,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-11 23:41:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:41:04,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:04,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624824390] [2022-07-11 23:41:04,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624824390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:04,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:04,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:04,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928540285] [2022-07-11 23:41:04,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:04,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:04,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:04,040 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) [2022-07-11 23:41:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:04,089 INFO L93 Difference]: Finished difference Result 408 states and 569 transitions. [2022-07-11 23:41:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:04,091 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 [2022-07-11 23:41:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:04,095 INFO L225 Difference]: With dead ends: 408 [2022-07-11 23:41:04,095 INFO L226 Difference]: Without dead ends: 178 [2022-07-11 23:41:04,096 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 [2022-07-11 23:41:04,098 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 [2022-07-11 23:41:04,098 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] [2022-07-11 23:41:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-11 23:41:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-07-11 23:41:04,114 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) [2022-07-11 23:41:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 224 transitions. [2022-07-11 23:41:04,118 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 224 transitions. Word has length 43 [2022-07-11 23:41:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:04,123 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 224 transitions. [2022-07-11 23:41:04,123 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) [2022-07-11 23:41:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 224 transitions. [2022-07-11 23:41:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:04,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:04,124 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] [2022-07-11 23:41:04,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:04,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:04,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2022-07-11 23:41:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:04,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422105699] [2022-07-11 23:41:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:04,328 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) [2022-07-11 23:41:04,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-11 23:41:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:41:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:04,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:04,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:04,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422105699] [2022-07-11 23:41:04,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422105699] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:04,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:04,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-11 23:41:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184565549] [2022-07-11 23:41:04,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:04,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:04,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:41:04,574 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) [2022-07-11 23:41:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:04,842 INFO L93 Difference]: Finished difference Result 316 states and 455 transitions. [2022-07-11 23:41:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:04,842 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 [2022-07-11 23:41:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:04,844 INFO L225 Difference]: With dead ends: 316 [2022-07-11 23:41:04,844 INFO L226 Difference]: Without dead ends: 280 [2022-07-11 23:41:04,844 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 [2022-07-11 23:41:04,845 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 189 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-11 23:41:04,845 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] [2022-07-11 23:41:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-11 23:41:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2022-07-11 23:41:04,852 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) [2022-07-11 23:41:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 275 transitions. [2022-07-11 23:41:04,853 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 275 transitions. Word has length 44 [2022-07-11 23:41:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 275 transitions. [2022-07-11 23:41:04,854 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) [2022-07-11 23:41:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 275 transitions. [2022-07-11 23:41:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:04,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:04,855 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] [2022-07-11 23:41:04,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2022-07-11 23:41:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:05,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441911040] [2022-07-11 23:41:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:05,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:05,064 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) [2022-07-11 23:41:05,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-11 23:41:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:41:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:05,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:05,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:05,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441911040] [2022-07-11 23:41:05,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441911040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:05,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:05,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:41:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516817891] [2022-07-11 23:41:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:41:05,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:41:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:41:05,130 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) [2022-07-11 23:41:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:05,157 INFO L93 Difference]: Finished difference Result 211 states and 281 transitions. [2022-07-11 23:41:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:05,157 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 [2022-07-11 23:41:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:05,159 INFO L225 Difference]: With dead ends: 211 [2022-07-11 23:41:05,159 INFO L226 Difference]: Without dead ends: 204 [2022-07-11 23:41:05,159 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 [2022-07-11 23:41:05,160 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 [2022-07-11 23:41:05,160 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] [2022-07-11 23:41:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-11 23:41:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-11 23:41:05,167 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) [2022-07-11 23:41:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 272 transitions. [2022-07-11 23:41:05,169 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 272 transitions. Word has length 44 [2022-07-11 23:41:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:05,169 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 272 transitions. [2022-07-11 23:41:05,169 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) [2022-07-11 23:41:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 272 transitions. [2022-07-11 23:41:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:05,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:05,170 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] [2022-07-11 23:41:05,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:05,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2022-07-11 23:41:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:05,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10491684] [2022-07-11 23:41:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:41:05,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:05,381 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) [2022-07-11 23:41:05,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-11 23:41:05,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-11 23:41:05,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:41:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:41:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:05,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:05,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10491684] [2022-07-11 23:41:05,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10491684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:05,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:05,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206289250] [2022-07-11 23:41:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:05,497 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) [2022-07-11 23:41:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:05,553 INFO L93 Difference]: Finished difference Result 247 states and 333 transitions. [2022-07-11 23:41:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:05,553 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 [2022-07-11 23:41:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:05,556 INFO L225 Difference]: With dead ends: 247 [2022-07-11 23:41:05,556 INFO L226 Difference]: Without dead ends: 245 [2022-07-11 23:41:05,556 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 [2022-07-11 23:41:05,556 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 [2022-07-11 23:41:05,557 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] [2022-07-11 23:41:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-11 23:41:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 208. [2022-07-11 23:41:05,564 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) [2022-07-11 23:41:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-07-11 23:41:05,564 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 44 [2022-07-11 23:41:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:05,565 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-07-11 23:41:05,565 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) [2022-07-11 23:41:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-07-11 23:41:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:05,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:05,566 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] [2022-07-11 23:41:05,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 54158117, now seen corresponding path program 1 times [2022-07-11 23:41:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644441749] [2022-07-11 23:41:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:05,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:05,779 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) [2022-07-11 23:41:05,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-11 23:41:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:41:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:41:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:06,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:06,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644441749] [2022-07-11 23:41:06,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644441749] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:06,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:06,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-11 23:41:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447833763] [2022-07-11 23:41:06,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:41:06,038 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) [2022-07-11 23:41:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:06,150 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-07-11 23:41:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:41:06,150 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 [2022-07-11 23:41:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:06,151 INFO L225 Difference]: With dead ends: 265 [2022-07-11 23:41:06,151 INFO L226 Difference]: Without dead ends: 263 [2022-07-11 23:41:06,152 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 [2022-07-11 23:41:06,152 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 [2022-07-11 23:41:06,152 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] [2022-07-11 23:41:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-11 23:41:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 212. [2022-07-11 23:41:06,164 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) [2022-07-11 23:41:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2022-07-11 23:41:06,165 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 44 [2022-07-11 23:41:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:06,165 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2022-07-11 23:41:06,165 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) [2022-07-11 23:41:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2022-07-11 23:41:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:41:06,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:06,166 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] [2022-07-11 23:41:06,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:06,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2022-07-11 23:41:06,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:06,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228783553] [2022-07-11 23:41:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:06,374 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) [2022-07-11 23:41:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-11 23:41:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:06,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:06,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228783553] [2022-07-11 23:41:06,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228783553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:06,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733261963] [2022-07-11 23:41:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:06,428 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) [2022-07-11 23:41:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:06,455 INFO L93 Difference]: Finished difference Result 351 states and 473 transitions. [2022-07-11 23:41:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:06,455 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 [2022-07-11 23:41:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:06,457 INFO L225 Difference]: With dead ends: 351 [2022-07-11 23:41:06,457 INFO L226 Difference]: Without dead ends: 299 [2022-07-11 23:41:06,458 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 [2022-07-11 23:41:06,458 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 [2022-07-11 23:41:06,458 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] [2022-07-11 23:41:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-11 23:41:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2022-07-11 23:41:06,478 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) [2022-07-11 23:41:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2022-07-11 23:41:06,480 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 45 [2022-07-11 23:41:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:06,480 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2022-07-11 23:41:06,480 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) [2022-07-11 23:41:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2022-07-11 23:41:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:41:06,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:06,481 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] [2022-07-11 23:41:06,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:06,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2022-07-11 23:41:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677352650] [2022-07-11 23:41:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:06,690 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) [2022-07-11 23:41:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-11 23:41:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:06,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:06,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:06,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677352650] [2022-07-11 23:41:06,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677352650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:06,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:06,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853184316] [2022-07-11 23:41:06,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:06,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:06,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:06,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:06,735 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) [2022-07-11 23:41:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:06,752 INFO L93 Difference]: Finished difference Result 246 states and 320 transitions. [2022-07-11 23:41:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:06,752 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 [2022-07-11 23:41:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:06,753 INFO L225 Difference]: With dead ends: 246 [2022-07-11 23:41:06,753 INFO L226 Difference]: Without dead ends: 207 [2022-07-11 23:41:06,754 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 [2022-07-11 23:41:06,754 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 [2022-07-11 23:41:06,754 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] [2022-07-11 23:41:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-11 23:41:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-07-11 23:41:06,763 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) [2022-07-11 23:41:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2022-07-11 23:41:06,764 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 48 [2022-07-11 23:41:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:06,764 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2022-07-11 23:41:06,764 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) [2022-07-11 23:41:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2022-07-11 23:41:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:41:06,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:06,765 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] [2022-07-11 23:41:06,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:06,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2022-07-11 23:41:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325124800] [2022-07-11 23:41:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:06,974 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) [2022-07-11 23:41:06,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-11 23:41:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:41:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:07,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:07,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325124800] [2022-07-11 23:41:07,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325124800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:07,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:07,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:41:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332309190] [2022-07-11 23:41:07,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:41:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:41:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:41:07,028 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) [2022-07-11 23:41:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:07,116 INFO L93 Difference]: Finished difference Result 334 states and 445 transitions. [2022-07-11 23:41:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:41:07,117 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 [2022-07-11 23:41:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:07,118 INFO L225 Difference]: With dead ends: 334 [2022-07-11 23:41:07,118 INFO L226 Difference]: Without dead ends: 292 [2022-07-11 23:41:07,119 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 [2022-07-11 23:41:07,119 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:07,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 424 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:41:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-11 23:41:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 207. [2022-07-11 23:41:07,133 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) [2022-07-11 23:41:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2022-07-11 23:41:07,134 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 49 [2022-07-11 23:41:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:07,134 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2022-07-11 23:41:07,134 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) [2022-07-11 23:41:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2022-07-11 23:41:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:41:07,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:07,135 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] [2022-07-11 23:41:07,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-11 23:41:07,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:07,342 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2022-07-11 23:41:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:07,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451826829] [2022-07-11 23:41:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:07,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:07,344 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) [2022-07-11 23:41:07,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-11 23:41:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:41:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:07,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:07,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451826829] [2022-07-11 23:41:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451826829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:07,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940166078] [2022-07-11 23:41:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:07,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:07,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:07,405 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) [2022-07-11 23:41:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:07,457 INFO L93 Difference]: Finished difference Result 325 states and 422 transitions. [2022-07-11 23:41:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:07,457 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 [2022-07-11 23:41:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:07,458 INFO L225 Difference]: With dead ends: 325 [2022-07-11 23:41:07,459 INFO L226 Difference]: Without dead ends: 294 [2022-07-11 23:41:07,459 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 [2022-07-11 23:41:07,459 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 [2022-07-11 23:41:07,460 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] [2022-07-11 23:41:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-11 23:41:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 211. [2022-07-11 23:41:07,469 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) [2022-07-11 23:41:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2022-07-11 23:41:07,470 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 49 [2022-07-11 23:41:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2022-07-11 23:41:07,470 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) [2022-07-11 23:41:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2022-07-11 23:41:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:41:07,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:07,471 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] [2022-07-11 23:41:07,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:07,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:07,677 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2022-07-11 23:41:07,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:07,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688708507] [2022-07-11 23:41:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:07,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:07,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:07,679 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) [2022-07-11 23:41:07,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-11 23:41:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:41:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:07,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:07,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688708507] [2022-07-11 23:41:07,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688708507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:07,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:07,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:41:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210914091] [2022-07-11 23:41:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:41:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:41:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:41:07,764 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) [2022-07-11 23:41:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:07,943 INFO L93 Difference]: Finished difference Result 327 states and 443 transitions. [2022-07-11 23:41:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:41:07,944 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 [2022-07-11 23:41:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:07,945 INFO L225 Difference]: With dead ends: 327 [2022-07-11 23:41:07,945 INFO L226 Difference]: Without dead ends: 303 [2022-07-11 23:41:07,945 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 [2022-07-11 23:41:07,946 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 [2022-07-11 23:41:07,946 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] [2022-07-11 23:41:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-11 23:41:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 248. [2022-07-11 23:41:07,957 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) [2022-07-11 23:41:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 325 transitions. [2022-07-11 23:41:07,958 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 325 transitions. Word has length 50 [2022-07-11 23:41:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:07,959 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 325 transitions. [2022-07-11 23:41:07,959 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) [2022-07-11 23:41:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 325 transitions. [2022-07-11 23:41:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:41:07,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:07,960 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] [2022-07-11 23:41:07,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -963972016, now seen corresponding path program 1 times [2022-07-11 23:41:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:08,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474653192] [2022-07-11 23:41:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:08,171 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) [2022-07-11 23:41:08,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-11 23:41:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:41:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:08,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:41:08,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474653192] [2022-07-11 23:41:08,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474653192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:08,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:08,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-11 23:41:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847489825] [2022-07-11 23:41:08,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:41:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:41:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:41:08,305 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) [2022-07-11 23:41:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:08,382 INFO L93 Difference]: Finished difference Result 282 states and 364 transitions. [2022-07-11 23:41:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:41:08,389 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 [2022-07-11 23:41:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:08,390 INFO L225 Difference]: With dead ends: 282 [2022-07-11 23:41:08,390 INFO L226 Difference]: Without dead ends: 248 [2022-07-11 23:41:08,391 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 [2022-07-11 23:41:08,391 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:08,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 507 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:41:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-11 23:41:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2022-07-11 23:41:08,403 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) [2022-07-11 23:41:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 299 transitions. [2022-07-11 23:41:08,405 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 299 transitions. Word has length 50 [2022-07-11 23:41:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:08,405 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 299 transitions. [2022-07-11 23:41:08,405 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) [2022-07-11 23:41:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 299 transitions. [2022-07-11 23:41:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:41:08,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:08,406 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] [2022-07-11 23:41:08,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2022-07-11 23:41:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719957104] [2022-07-11 23:41:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:08,609 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) [2022-07-11 23:41:08,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-11 23:41:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:08,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:08,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719957104] [2022-07-11 23:41:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719957104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:08,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:08,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808493009] [2022-07-11 23:41:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:08,668 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) [2022-07-11 23:41:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:08,699 INFO L93 Difference]: Finished difference Result 273 states and 355 transitions. [2022-07-11 23:41:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:08,699 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 [2022-07-11 23:41:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:08,700 INFO L225 Difference]: With dead ends: 273 [2022-07-11 23:41:08,700 INFO L226 Difference]: Without dead ends: 239 [2022-07-11 23:41:08,701 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 [2022-07-11 23:41:08,701 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 [2022-07-11 23:41:08,702 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] [2022-07-11 23:41:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-11 23:41:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2022-07-11 23:41:08,713 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) [2022-07-11 23:41:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 287 transitions. [2022-07-11 23:41:08,714 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 287 transitions. Word has length 50 [2022-07-11 23:41:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:08,714 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 287 transitions. [2022-07-11 23:41:08,715 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) [2022-07-11 23:41:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 287 transitions. [2022-07-11 23:41:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:41:08,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:08,716 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] [2022-07-11 23:41:08,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,924 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2022-07-11 23:41:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144034423] [2022-07-11 23:41:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:08,926 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) [2022-07-11 23:41:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-11 23:41:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:08,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:08,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144034423] [2022-07-11 23:41:08,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144034423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:08,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424510373] [2022-07-11 23:41:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:08,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:08,985 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) [2022-07-11 23:41:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:09,005 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2022-07-11 23:41:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:09,005 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 [2022-07-11 23:41:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:09,006 INFO L225 Difference]: With dead ends: 235 [2022-07-11 23:41:09,006 INFO L226 Difference]: Without dead ends: 194 [2022-07-11 23:41:09,007 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 [2022-07-11 23:41:09,007 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 [2022-07-11 23:41:09,007 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] [2022-07-11 23:41:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-11 23:41:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2022-07-11 23:41:09,020 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) [2022-07-11 23:41:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2022-07-11 23:41:09,021 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 52 [2022-07-11 23:41:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:09,021 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2022-07-11 23:41:09,021 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) [2022-07-11 23:41:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2022-07-11 23:41:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:41:09,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:09,022 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] [2022-07-11 23:41:09,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:09,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:09,230 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2022-07-11 23:41:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:09,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372161890] [2022-07-11 23:41:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:09,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:09,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:09,236 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) [2022-07-11 23:41:09,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-11 23:41:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:41:09,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:09,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:09,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372161890] [2022-07-11 23:41:09,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372161890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:09,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:09,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798285219] [2022-07-11 23:41:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:09,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:09,324 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) [2022-07-11 23:41:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:09,484 INFO L93 Difference]: Finished difference Result 270 states and 348 transitions. [2022-07-11 23:41:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:09,484 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 [2022-07-11 23:41:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:09,485 INFO L225 Difference]: With dead ends: 270 [2022-07-11 23:41:09,485 INFO L226 Difference]: Without dead ends: 221 [2022-07-11 23:41:09,486 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 [2022-07-11 23:41:09,486 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 [2022-07-11 23:41:09,486 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] [2022-07-11 23:41:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-11 23:41:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2022-07-11 23:41:09,497 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) [2022-07-11 23:41:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2022-07-11 23:41:09,498 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 52 [2022-07-11 23:41:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:09,499 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2022-07-11 23:41:09,499 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) [2022-07-11 23:41:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2022-07-11 23:41:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:41:09,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:09,500 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] [2022-07-11 23:41:09,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:09,708 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 147478644, now seen corresponding path program 1 times [2022-07-11 23:41:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274663557] [2022-07-11 23:41:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:09,711 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) [2022-07-11 23:41:09,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-11 23:41:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:41:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:13,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:13,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274663557] [2022-07-11 23:41:13,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274663557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:13,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:13,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:41:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076872804] [2022-07-11 23:41:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:41:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:41:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-11 23:41:13,379 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) [2022-07-11 23:41:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:13,418 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2022-07-11 23:41:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:13,419 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 [2022-07-11 23:41:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:13,419 INFO L225 Difference]: With dead ends: 167 [2022-07-11 23:41:13,419 INFO L226 Difference]: Without dead ends: 165 [2022-07-11 23:41:13,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-07-11 23:41:13,420 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 [2022-07-11 23:41:13,420 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] [2022-07-11 23:41:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-11 23:41:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-11 23:41:13,428 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) [2022-07-11 23:41:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2022-07-11 23:41:13,428 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 54 [2022-07-11 23:41:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:13,429 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2022-07-11 23:41:13,429 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) [2022-07-11 23:41:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2022-07-11 23:41:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:41:13,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:13,429 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] [2022-07-11 23:41:13,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:13,637 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -36563148, now seen corresponding path program 1 times [2022-07-11 23:41:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885344042] [2022-07-11 23:41:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:13,639 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) [2022-07-11 23:41:13,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-11 23:41:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:41:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:22,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:22,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885344042] [2022-07-11 23:41:22,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885344042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:22,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:22,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:41:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408366399] [2022-07-11 23:41:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:41:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:41:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=37, Unknown=4, NotChecked=0, Total=56 [2022-07-11 23:41:22,896 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) [2022-07-11 23:41:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:22,932 INFO L93 Difference]: Finished difference Result 212 states and 271 transitions. [2022-07-11 23:41:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:22,932 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 [2022-07-11 23:41:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:22,933 INFO L225 Difference]: With dead ends: 212 [2022-07-11 23:41:22,933 INFO L226 Difference]: Without dead ends: 210 [2022-07-11 23:41:22,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=19, Invalid=49, Unknown=4, NotChecked=0, Total=72 [2022-07-11 23:41:22,934 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 39 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:22,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 597 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2022-07-11 23:41:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-11 23:41:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 162. [2022-07-11 23:41:22,950 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) [2022-07-11 23:41:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2022-07-11 23:41:22,951 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 55 [2022-07-11 23:41:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:22,952 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2022-07-11 23:41:22,952 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) [2022-07-11 23:41:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2022-07-11 23:41:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:41:22,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:22,952 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] [2022-07-11 23:41:22,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:23,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2022-07-11 23:41:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916437255] [2022-07-11 23:41:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:23,177 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) [2022-07-11 23:41:23,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-11 23:41:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 23:41:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:23,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:23,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916437255] [2022-07-11 23:41:23,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916437255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:23,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:23,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-11 23:41:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35890025] [2022-07-11 23:41:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:41:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:41:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:41:23,650 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) [2022-07-11 23:41:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:25,241 INFO L93 Difference]: Finished difference Result 237 states and 303 transitions. [2022-07-11 23:41:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:41:25,242 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 [2022-07-11 23:41:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:25,243 INFO L225 Difference]: With dead ends: 237 [2022-07-11 23:41:25,243 INFO L226 Difference]: Without dead ends: 225 [2022-07-11 23:41:25,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:41:25,244 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 170 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:25,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 955 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:41:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-11 23:41:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2022-07-11 23:41:25,256 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) [2022-07-11 23:41:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-07-11 23:41:25,257 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 58 [2022-07-11 23:41:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:25,257 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-07-11 23:41:25,257 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) [2022-07-11 23:41:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-07-11 23:41:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:41:25,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:25,258 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] [2022-07-11 23:41:25,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:25,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:25,465 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2022-07-11 23:41:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049531704] [2022-07-11 23:41:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:25,467 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) [2022-07-11 23:41:25,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-11 23:41:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:25,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:25,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:25,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:25,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049531704] [2022-07-11 23:41:25,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049531704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:25,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:25,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:25,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49493570] [2022-07-11 23:41:25,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:25,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:25,536 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) [2022-07-11 23:41:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:25,598 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2022-07-11 23:41:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:25,599 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 [2022-07-11 23:41:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:25,599 INFO L225 Difference]: With dead ends: 181 [2022-07-11 23:41:25,599 INFO L226 Difference]: Without dead ends: 179 [2022-07-11 23:41:25,600 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 [2022-07-11 23:41:25,600 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 [2022-07-11 23:41:25,600 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] [2022-07-11 23:41:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-11 23:41:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2022-07-11 23:41:25,610 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) [2022-07-11 23:41:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2022-07-11 23:41:25,611 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 60 [2022-07-11 23:41:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:25,611 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2022-07-11 23:41:25,612 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) [2022-07-11 23:41:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2022-07-11 23:41:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:41:25,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:25,612 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] [2022-07-11 23:41:25,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:25,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:25,819 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362596, now seen corresponding path program 1 times [2022-07-11 23:41:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624001700] [2022-07-11 23:41:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:25,821 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) [2022-07-11 23:41:25,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-11 23:41:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:41:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:26,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:26,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624001700] [2022-07-11 23:41:26,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624001700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:26,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:26,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-11 23:41:26,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789171061] [2022-07-11 23:41:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:41:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:41:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:41:26,179 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) [2022-07-11 23:41:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:27,656 INFO L93 Difference]: Finished difference Result 431 states and 558 transitions. [2022-07-11 23:41:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:41:27,657 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 [2022-07-11 23:41:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:27,658 INFO L225 Difference]: With dead ends: 431 [2022-07-11 23:41:27,658 INFO L226 Difference]: Without dead ends: 399 [2022-07-11 23:41:27,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:41:27,659 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 462 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:27,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 985 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:41:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-11 23:41:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 196. [2022-07-11 23:41:27,677 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) [2022-07-11 23:41:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2022-07-11 23:41:27,678 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 60 [2022-07-11 23:41:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:27,678 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2022-07-11 23:41:27,678 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) [2022-07-11 23:41:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2022-07-11 23:41:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:41:27,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:27,679 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] [2022-07-11 23:41:27,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:27,885 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 865353347, now seen corresponding path program 1 times [2022-07-11 23:41:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806672476] [2022-07-11 23:41:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:27,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:27,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:27,887 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) [2022-07-11 23:41:27,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-11 23:41:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:27,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:27,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:27,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806672476] [2022-07-11 23:41:27,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806672476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:27,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:27,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267193654] [2022-07-11 23:41:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:27,951 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) [2022-07-11 23:41:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:28,014 INFO L93 Difference]: Finished difference Result 218 states and 269 transitions. [2022-07-11 23:41:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:28,015 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 [2022-07-11 23:41:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:28,016 INFO L225 Difference]: With dead ends: 218 [2022-07-11 23:41:28,016 INFO L226 Difference]: Without dead ends: 216 [2022-07-11 23:41:28,016 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 [2022-07-11 23:41:28,017 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 [2022-07-11 23:41:28,017 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] [2022-07-11 23:41:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-11 23:41:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 201. [2022-07-11 23:41:28,031 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) [2022-07-11 23:41:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 248 transitions. [2022-07-11 23:41:28,032 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 248 transitions. Word has length 60 [2022-07-11 23:41:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:28,032 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 248 transitions. [2022-07-11 23:41:28,032 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) [2022-07-11 23:41:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 248 transitions. [2022-07-11 23:41:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:41:28,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:28,033 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] [2022-07-11 23:41:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:28,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2022-07-11 23:41:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517483128] [2022-07-11 23:41:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:28,244 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) [2022-07-11 23:41:28,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-11 23:41:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:28,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:41:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:29,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:29,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:29,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517483128] [2022-07-11 23:41:29,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517483128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:29,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:29,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-11 23:41:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632630022] [2022-07-11 23:41:29,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:41:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:41:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:41:29,028 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) [2022-07-11 23:41:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:29,398 INFO L93 Difference]: Finished difference Result 339 states and 426 transitions. [2022-07-11 23:41:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:41:29,399 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 [2022-07-11 23:41:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:29,400 INFO L225 Difference]: With dead ends: 339 [2022-07-11 23:41:29,400 INFO L226 Difference]: Without dead ends: 319 [2022-07-11 23:41:29,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:41:29,401 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 [2022-07-11 23:41:29,401 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] [2022-07-11 23:41:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-11 23:41:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2022-07-11 23:41:29,418 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) [2022-07-11 23:41:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 259 transitions. [2022-07-11 23:41:29,419 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 259 transitions. Word has length 65 [2022-07-11 23:41:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:29,419 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 259 transitions. [2022-07-11 23:41:29,419 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) [2022-07-11 23:41:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 259 transitions. [2022-07-11 23:41:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:41:29,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:29,420 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] [2022-07-11 23:41:29,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:29,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:29,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1450417120, now seen corresponding path program 1 times [2022-07-11 23:41:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:29,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506796611] [2022-07-11 23:41:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:29,629 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) [2022-07-11 23:41:29,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-11 23:41:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:41:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:32,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:32,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506796611] [2022-07-11 23:41:32,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506796611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:32,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:32,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:41:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708826620] [2022-07-11 23:41:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:32,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:41:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:41:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-11 23:41:32,197 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) [2022-07-11 23:41:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:32,493 INFO L93 Difference]: Finished difference Result 273 states and 338 transitions. [2022-07-11 23:41:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:41:32,494 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 [2022-07-11 23:41:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:32,495 INFO L225 Difference]: With dead ends: 273 [2022-07-11 23:41:32,495 INFO L226 Difference]: Without dead ends: 253 [2022-07-11 23:41:32,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2022-07-11 23:41:32,495 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 64 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:32,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 601 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 209 Unchecked, 0.0s Time] [2022-07-11 23:41:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-11 23:41:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 208. [2022-07-11 23:41:32,513 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) [2022-07-11 23:41:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 257 transitions. [2022-07-11 23:41:32,514 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 257 transitions. Word has length 65 [2022-07-11 23:41:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:32,514 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 257 transitions. [2022-07-11 23:41:32,515 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) [2022-07-11 23:41:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 257 transitions. [2022-07-11 23:41:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:41:32,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:32,516 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] [2022-07-11 23:41:32,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:32,722 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash -957629534, now seen corresponding path program 1 times [2022-07-11 23:41:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639410409] [2022-07-11 23:41:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:32,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:32,724 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) [2022-07-11 23:41:32,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-11 23:41:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:32,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 23:41:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 23:41:33,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:34,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639410409] [2022-07-11 23:41:34,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639410409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552370134] [2022-07-11 23:41:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:34,079 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-11 23:41:34,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-11 23:41:34,081 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) [2022-07-11 23:41:34,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-11 23:41:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:41:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 23:41:44,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:44,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552370134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:44,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:44,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2022-07-11 23:41:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186595975] [2022-07-11 23:41:44,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:44,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:41:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:41:44,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=580, Unknown=4, NotChecked=0, Total=650 [2022-07-11 23:41:44,153 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) [2022-07-11 23:41:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:50,773 INFO L93 Difference]: Finished difference Result 358 states and 449 transitions. [2022-07-11 23:41:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:41:50,773 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 [2022-07-11 23:41:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:50,774 INFO L225 Difference]: With dead ends: 358 [2022-07-11 23:41:50,774 INFO L226 Difference]: Without dead ends: 338 [2022-07-11 23:41:50,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=94, Invalid=832, Unknown=4, NotChecked=0, Total=930 [2022-07-11 23:41:50,775 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 87 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:50,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1732 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 647 Unchecked, 0.1s Time] [2022-07-11 23:41:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-11 23:41:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 210. [2022-07-11 23:41:50,794 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) [2022-07-11 23:41:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2022-07-11 23:41:50,795 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 66 [2022-07-11 23:41:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:50,795 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2022-07-11 23:41:50,796 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) [2022-07-11 23:41:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2022-07-11 23:41:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:41:50,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:50,796 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] [2022-07-11 23:41:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:51,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-11 23:41:51,198 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 [2022-07-11 23:41:51,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -660447408, now seen corresponding path program 1 times [2022-07-11 23:41:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:51,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755191395] [2022-07-11 23:41:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:51,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:51,200 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) [2022-07-11 23:41:51,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-11 23:41:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:41:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:51,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:51,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755191395] [2022-07-11 23:41:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755191395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:51,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-11 23:41:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921461845] [2022-07-11 23:41:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:51,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:41:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:41:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:41:51,673 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) [2022-07-11 23:41:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:52,807 INFO L93 Difference]: Finished difference Result 313 states and 390 transitions. [2022-07-11 23:41:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:41:52,807 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 [2022-07-11 23:41:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:52,808 INFO L225 Difference]: With dead ends: 313 [2022-07-11 23:41:52,808 INFO L226 Difference]: Without dead ends: 305 [2022-07-11 23:41:52,809 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 [2022-07-11 23:41:52,809 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 126 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:52,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 914 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:41:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-11 23:41:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 211. [2022-07-11 23:41:52,833 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) [2022-07-11 23:41:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2022-07-11 23:41:52,833 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 66 [2022-07-11 23:41:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:52,834 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2022-07-11 23:41:52,834 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) [2022-07-11 23:41:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2022-07-11 23:41:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:41:52,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:52,835 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] [2022-07-11 23:41:52,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:53,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:53,042 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2022-07-11 23:41:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431691997] [2022-07-11 23:41:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:53,044 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) [2022-07-11 23:41:53,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-11 23:41:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:41:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:53,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:53,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431691997] [2022-07-11 23:41:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431691997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:53,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:53,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:41:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577727189] [2022-07-11 23:41:53,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:53,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:41:53,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:41:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:41:53,197 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) [2022-07-11 23:41:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:53,392 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2022-07-11 23:41:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:53,392 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 [2022-07-11 23:41:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:53,394 INFO L225 Difference]: With dead ends: 338 [2022-07-11 23:41:53,394 INFO L226 Difference]: Without dead ends: 318 [2022-07-11 23:41:53,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:41:53,395 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 77 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:53,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 732 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-07-11 23:41:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-11 23:41:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 201. [2022-07-11 23:41:53,419 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) [2022-07-11 23:41:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 245 transitions. [2022-07-11 23:41:53,420 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 245 transitions. Word has length 66 [2022-07-11 23:41:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:53,420 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 245 transitions. [2022-07-11 23:41:53,421 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) [2022-07-11 23:41:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 245 transitions. [2022-07-11 23:41:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:41:53,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:53,421 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] [2022-07-11 23:41:53,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:53,631 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1041931164, now seen corresponding path program 1 times [2022-07-11 23:41:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941297439] [2022-07-11 23:41:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:53,633 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) [2022-07-11 23:41:53,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-11 23:41:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:41:53,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:41:53,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:54,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:54,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941297439] [2022-07-11 23:41:54,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941297439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:54,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349751300] [2022-07-11 23:41:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:54,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-11 23:41:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-11 23:41:54,087 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) [2022-07-11 23:41:54,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-11 23:41:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:41:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:41:54,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:41:54,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349751300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:54,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:54,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 12 [2022-07-11 23:41:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495851122] [2022-07-11 23:41:54,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:54,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:41:54,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:41:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:41:54,230 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) [2022-07-11 23:41:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:54,386 INFO L93 Difference]: Finished difference Result 232 states and 273 transitions. [2022-07-11 23:41:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:41:54,386 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 [2022-07-11 23:41:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:54,387 INFO L225 Difference]: With dead ends: 232 [2022-07-11 23:41:54,387 INFO L226 Difference]: Without dead ends: 174 [2022-07-11 23:41:54,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:41:54,388 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 60 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 794 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 [2022-07-11 23:41:54,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 794 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-07-11 23:41:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-11 23:41:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-07-11 23:41:54,407 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) [2022-07-11 23:41:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-07-11 23:41:54,415 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 67 [2022-07-11 23:41:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:54,416 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-07-11 23:41:54,416 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) [2022-07-11 23:41:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-07-11 23:41:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:41:54,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:54,417 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] [2022-07-11 23:41:54,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:54,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-11 23:41:54,819 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 [2022-07-11 23:41:54,819 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2022-07-11 23:41:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070920707] [2022-07-11 23:41:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:54,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:54,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:54,821 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) [2022-07-11 23:41:54,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-11 23:41:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:54,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:54,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:54,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070920707] [2022-07-11 23:41:54,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070920707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:54,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:54,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:54,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099146339] [2022-07-11 23:41:54,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:54,880 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) [2022-07-11 23:41:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:54,943 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-07-11 23:41:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:54,944 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 [2022-07-11 23:41:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:54,944 INFO L225 Difference]: With dead ends: 209 [2022-07-11 23:41:54,944 INFO L226 Difference]: Without dead ends: 195 [2022-07-11 23:41:54,945 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 [2022-07-11 23:41:54,945 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 [2022-07-11 23:41:54,945 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] [2022-07-11 23:41:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-11 23:41:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-07-11 23:41:54,969 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) [2022-07-11 23:41:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 204 transitions. [2022-07-11 23:41:54,970 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 204 transitions. Word has length 68 [2022-07-11 23:41:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:54,970 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 204 transitions. [2022-07-11 23:41:54,970 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) [2022-07-11 23:41:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 204 transitions. [2022-07-11 23:41:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:41:54,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:54,971 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] [2022-07-11 23:41:54,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:55,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,177 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 106001302, now seen corresponding path program 1 times [2022-07-11 23:41:55,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:55,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772876903] [2022-07-11 23:41:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:55,179 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) [2022-07-11 23:41:55,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-11 23:41:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:55,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:55,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772876903] [2022-07-11 23:41:55,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772876903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:55,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:55,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:41:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011894657] [2022-07-11 23:41:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:41:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:41:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:41:55,238 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) [2022-07-11 23:41:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:55,301 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-07-11 23:41:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:55,301 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 [2022-07-11 23:41:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:55,302 INFO L225 Difference]: With dead ends: 199 [2022-07-11 23:41:55,302 INFO L226 Difference]: Without dead ends: 185 [2022-07-11 23:41:55,302 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 [2022-07-11 23:41:55,302 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 [2022-07-11 23:41:55,302 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] [2022-07-11 23:41:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-11 23:41:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2022-07-11 23:41:55,318 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) [2022-07-11 23:41:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-07-11 23:41:55,319 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 68 [2022-07-11 23:41:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:55,319 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-07-11 23:41:55,319 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) [2022-07-11 23:41:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-07-11 23:41:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:41:55,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:55,320 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] [2022-07-11 23:41:55,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,526 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1565040980, now seen corresponding path program 1 times [2022-07-11 23:41:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:55,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143537404] [2022-07-11 23:41:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:55,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:55,528 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) [2022-07-11 23:41:55,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-11 23:41:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:55,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:55,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143537404] [2022-07-11 23:41:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143537404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:55,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691973452] [2022-07-11 23:41:55,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:55,597 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) [2022-07-11 23:41:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:55,626 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2022-07-11 23:41:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:55,626 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 [2022-07-11 23:41:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:55,627 INFO L225 Difference]: With dead ends: 170 [2022-07-11 23:41:55,627 INFO L226 Difference]: Without dead ends: 115 [2022-07-11 23:41:55,627 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 [2022-07-11 23:41:55,628 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 233 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 [2022-07-11 23:41:55,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 233 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:41:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-11 23:41:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2022-07-11 23:41:55,638 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) [2022-07-11 23:41:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-07-11 23:41:55,638 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 70 [2022-07-11 23:41:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:55,638 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-07-11 23:41:55,638 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) [2022-07-11 23:41:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-07-11 23:41:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:41:55,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:55,639 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] [2022-07-11 23:41:55,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-11 23:41:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,840 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1885920814, now seen corresponding path program 1 times [2022-07-11 23:41:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931098449] [2022-07-11 23:41:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:55,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:55,841 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) [2022-07-11 23:41:55,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-11 23:41:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 23:41:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:41:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:56,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931098449] [2022-07-11 23:41:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931098449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977057690] [2022-07-11 23:41:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-11 23:41:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-11 23:41:56,449 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) [2022-07-11 23:41:56,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-11 23:41:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:41:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-11 23:41:56,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977057690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-11 23:41:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156025766] [2022-07-11 23:41:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:41:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:41:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:41:56,610 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) [2022-07-11 23:41:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:56,818 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2022-07-11 23:41:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:41:56,819 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 [2022-07-11 23:41:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:56,820 INFO L225 Difference]: With dead ends: 175 [2022-07-11 23:41:56,820 INFO L226 Difference]: Without dead ends: 127 [2022-07-11 23:41:56,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:41:56,820 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 125 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:56,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 244 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:41:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-11 23:41:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2022-07-11 23:41:56,834 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) [2022-07-11 23:41:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2022-07-11 23:41:56,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 70 [2022-07-11 23:41:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:56,835 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2022-07-11 23:41:56,835 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) [2022-07-11 23:41:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2022-07-11 23:41:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:41:56,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:56,837 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] [2022-07-11 23:41:56,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-11 23:41:57,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:57,243 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 [2022-07-11 23:41:57,243 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2134286868, now seen corresponding path program 1 times [2022-07-11 23:41:57,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:41:57,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009482166] [2022-07-11 23:41:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:57,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:41:57,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:41:57,244 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) [2022-07-11 23:41:57,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-11 23:41:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:57,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:41:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 23:41:59,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:59,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:41:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009482166] [2022-07-11 23:41:59,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009482166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:59,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:59,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:41:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173689967] [2022-07-11 23:41:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:41:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:41:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:41:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-11 23:41:59,832 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) [2022-07-11 23:41:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:59,931 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-07-11 23:41:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:41:59,932 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 [2022-07-11 23:41:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:59,932 INFO L225 Difference]: With dead ends: 140 [2022-07-11 23:41:59,933 INFO L226 Difference]: Without dead ends: 130 [2022-07-11 23:41:59,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-11 23:41:59,933 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 402 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2022-07-11 23:41:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-11 23:41:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2022-07-11 23:41:59,948 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) [2022-07-11 23:41:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2022-07-11 23:41:59,948 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 70 [2022-07-11 23:41:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:59,948 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2022-07-11 23:41:59,949 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) [2022-07-11 23:41:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2022-07-11 23:41:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:41:59,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:59,949 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] [2022-07-11 23:41:59,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-11 23:42:00,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:00,150 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2022-07-11 23:42:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:00,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483167874] [2022-07-11 23:42:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:00,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:00,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:00,151 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) [2022-07-11 23:42:00,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-11 23:42:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:42:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:42:00,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:42:00,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:00,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483167874] [2022-07-11 23:42:00,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483167874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:42:00,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2068018884] [2022-07-11 23:42:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:00,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-11 23:42:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-11 23:42:00,515 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) [2022-07-11 23:42:00,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-11 23:42:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:42:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:42:00,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:42:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:42:00,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2068018884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:42:00,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:42:00,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 11 [2022-07-11 23:42:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822675083] [2022-07-11 23:42:00,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:42:00,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:42:00,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:42:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:42:00,635 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) [2022-07-11 23:42:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:00,720 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-07-11 23:42:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:42:00,721 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 [2022-07-11 23:42:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:00,721 INFO L225 Difference]: With dead ends: 128 [2022-07-11 23:42:00,721 INFO L226 Difference]: Without dead ends: 68 [2022-07-11 23:42:00,722 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 [2022-07-11 23:42:00,722 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 [2022-07-11 23:42:00,722 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] [2022-07-11 23:42:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-11 23:42:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-11 23:42:00,727 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) [2022-07-11 23:42:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-07-11 23:42:00,728 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 69 [2022-07-11 23:42:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:00,728 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-07-11 23:42:00,728 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) [2022-07-11 23:42:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-07-11 23:42:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 23:42:00,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:00,729 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] [2022-07-11 23:42:00,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:00,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:01,140 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 [2022-07-11 23:42:01,140 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2022-07-11 23:42:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258972240] [2022-07-11 23:42:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:01,142 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) [2022-07-11 23:42:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-11 23:42:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:42:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 23:42:03,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:03,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258972240] [2022-07-11 23:42:03,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258972240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:03,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:03,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:42:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952130373] [2022-07-11 23:42:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:03,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:42:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:42:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2022-07-11 23:42:03,687 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) [2022-07-11 23:42:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:03,919 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-07-11 23:42:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:42:03,920 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 [2022-07-11 23:42:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:03,920 INFO L225 Difference]: With dead ends: 104 [2022-07-11 23:42:03,920 INFO L226 Difference]: Without dead ends: 96 [2022-07-11 23:42:03,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2022-07-11 23:42:03,921 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 22 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 431 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 [2022-07-11 23:42:03,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 431 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 114 Unchecked, 0.0s Time] [2022-07-11 23:42:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-11 23:42:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2022-07-11 23:42:03,929 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) [2022-07-11 23:42:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-07-11 23:42:03,929 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 73 [2022-07-11 23:42:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:03,930 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-07-11 23:42:03,930 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) [2022-07-11 23:42:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-07-11 23:42:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 23:42:03,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:03,930 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] [2022-07-11 23:42:03,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:04,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:04,137 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash 696504559, now seen corresponding path program 1 times [2022-07-11 23:42:04,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:04,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559669084] [2022-07-11 23:42:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:04,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:04,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:04,139 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) [2022-07-11 23:42:04,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-11 23:42:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 23:42:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:42:04,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:04,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559669084] [2022-07-11 23:42:04,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559669084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:04,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:04,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-11 23:42:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901366942] [2022-07-11 23:42:04,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:04,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:42:04,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:42:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:42:04,856 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) [2022-07-11 23:42:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:04,954 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-07-11 23:42:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:42:04,955 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 [2022-07-11 23:42:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:04,956 INFO L225 Difference]: With dead ends: 108 [2022-07-11 23:42:04,956 INFO L226 Difference]: Without dead ends: 88 [2022-07-11 23:42:04,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:42:04,957 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 20 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:04,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 589 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 244 Unchecked, 0.1s Time] [2022-07-11 23:42:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-11 23:42:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-07-11 23:42:04,963 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) [2022-07-11 23:42:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-07-11 23:42:04,963 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 73 [2022-07-11 23:42:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:04,963 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-07-11 23:42:04,964 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) [2022-07-11 23:42:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-07-11 23:42:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 23:42:04,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:04,964 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] [2022-07-11 23:42:04,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:05,171 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -405666381, now seen corresponding path program 1 times [2022-07-11 23:42:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:05,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277183572] [2022-07-11 23:42:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:05,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:05,172 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) [2022-07-11 23:42:05,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-11 23:42:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 23:42:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 23:42:06,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:06,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:06,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277183572] [2022-07-11 23:42:06,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277183572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:06,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:06,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-11 23:42:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081896911] [2022-07-11 23:42:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:42:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:42:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:42:06,266 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) [2022-07-11 23:42:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:08,027 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2022-07-11 23:42:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:42:08,028 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 [2022-07-11 23:42:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:08,029 INFO L225 Difference]: With dead ends: 107 [2022-07-11 23:42:08,029 INFO L226 Difference]: Without dead ends: 88 [2022-07-11 23:42:08,029 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 [2022-07-11 23:42:08,029 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 75 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 494 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 306 Invalid, 0 Unknown, 43 Unchecked, 0.8s Time] [2022-07-11 23:42:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-11 23:42:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-07-11 23:42:08,035 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) [2022-07-11 23:42:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-07-11 23:42:08,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 73 [2022-07-11 23:42:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:08,036 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-07-11 23:42:08,036 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) [2022-07-11 23:42:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-07-11 23:42:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:42:08,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:08,037 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] [2022-07-11 23:42:08,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-11 23:42:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:08,248 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1028998347, now seen corresponding path program 1 times [2022-07-11 23:42:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803680141] [2022-07-11 23:42:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:08,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:08,250 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) [2022-07-11 23:42:08,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-11 23:42:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:42:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 23:42:08,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:08,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803680141] [2022-07-11 23:42:08,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803680141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:08,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:08,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:42:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969774187] [2022-07-11 23:42:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:42:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:42:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:42:08,472 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) [2022-07-11 23:42:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:08,631 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-11 23:42:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:42:08,635 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 [2022-07-11 23:42:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:08,636 INFO L225 Difference]: With dead ends: 96 [2022-07-11 23:42:08,636 INFO L226 Difference]: Without dead ends: 88 [2022-07-11 23:42:08,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:42:08,637 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 26 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:08,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 492 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-07-11 23:42:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-11 23:42:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-07-11 23:42:08,649 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) [2022-07-11 23:42:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-07-11 23:42:08,649 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 74 [2022-07-11 23:42:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:08,650 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-07-11 23:42:08,650 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) [2022-07-11 23:42:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-07-11 23:42:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:42:08,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:08,650 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] [2022-07-11 23:42:08,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:08,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:08,860 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash -770832909, now seen corresponding path program 1 times [2022-07-11 23:42:08,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120016475] [2022-07-11 23:42:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:08,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:08,877 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) [2022-07-11 23:42:08,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-11 23:42:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:42:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:42:09,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:09,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120016475] [2022-07-11 23:42:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120016475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:09,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-11 23:42:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630446421] [2022-07-11 23:42:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:42:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:42:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:42:09,616 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) [2022-07-11 23:42:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:09,713 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-11 23:42:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:42:09,714 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 [2022-07-11 23:42:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:09,714 INFO L225 Difference]: With dead ends: 96 [2022-07-11 23:42:09,714 INFO L226 Difference]: Without dead ends: 68 [2022-07-11 23:42:09,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:42:09,715 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, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:09,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 632 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 189 Unchecked, 0.0s Time] [2022-07-11 23:42:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-11 23:42:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-11 23:42:09,721 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) [2022-07-11 23:42:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-07-11 23:42:09,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 74 [2022-07-11 23:42:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:09,722 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-07-11 23:42:09,722 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) [2022-07-11 23:42:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-07-11 23:42:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:42:09,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:09,723 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] [2022-07-11 23:42:09,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-07-11 23:42:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:09,932 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2022-07-11 23:42:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135704305] [2022-07-11 23:42:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:09,934 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) [2022-07-11 23:42:09,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-11 23:42:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:42:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 23:42:10,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:10,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135704305] [2022-07-11 23:42:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135704305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:10,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:10,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-11 23:42:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943611569] [2022-07-11 23:42:10,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:42:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:42:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:42:10,994 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) [2022-07-11 23:42:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:12,055 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-07-11 23:42:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:42:12,056 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 [2022-07-11 23:42:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:12,057 INFO L225 Difference]: With dead ends: 76 [2022-07-11 23:42:12,057 INFO L226 Difference]: Without dead ends: 68 [2022-07-11 23:42:12,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:42:12,057 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:42:12,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 492 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2022-07-11 23:42:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-11 23:42:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-11 23:42:12,063 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) [2022-07-11 23:42:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-07-11 23:42:12,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 74 [2022-07-11 23:42:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-07-11 23:42:12,064 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) [2022-07-11 23:42:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-07-11 23:42:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:42:12,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:42:12,065 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] [2022-07-11 23:42:12,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:12,272 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:42:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:42:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1165199695, now seen corresponding path program 1 times [2022-07-11 23:42:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:42:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839352586] [2022-07-11 23:42:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:42:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:42:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:42:12,274 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) [2022-07-11 23:42:12,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-11 23:42:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:42:12,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:42:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:42:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:42:12,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:42:12,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:42:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839352586] [2022-07-11 23:42:12,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839352586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:42:12,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:42:12,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:42:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068843721] [2022-07-11 23:42:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:42:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:42:12,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:42:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:42:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:42:12,448 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) [2022-07-11 23:42:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:42:12,545 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-07-11 23:42:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:42:12,545 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 [2022-07-11 23:42:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:42:12,545 INFO L225 Difference]: With dead ends: 68 [2022-07-11 23:42:12,545 INFO L226 Difference]: Without dead ends: 0 [2022-07-11 23:42:12,546 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 [2022-07-11 23:42:12,546 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 [2022-07-11 23:42:12,546 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] [2022-07-11 23:42:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-11 23:42:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-11 23:42:12,547 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) [2022-07-11 23:42:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-11 23:42:12,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-07-11 23:42:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:42:12,547 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-11 23:42:12,547 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) [2022-07-11 23:42:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-11 23:42:12,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-11 23:42:12,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:42:12,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-11 23:42:12,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:42:12,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-11 23:43:07,099 WARN L233 SmtUtils]: Spent 54.34s 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)