./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-3a.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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:26:14,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:26:14,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:26:14,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:26:14,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:26:14,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:26:14,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:26:14,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:26:14,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:26:14,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:26:14,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:26:14,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:26:14,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:26:14,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:26:14,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:26:14,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:26:14,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:26:14,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:26:14,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:26:14,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:26:14,103 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:26:14,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:26:14,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:26:14,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:26:14,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:26:14,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:26:14,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:26:14,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:26:14,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:26:14,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:26:14,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:26:14,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:26:14,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:26:14,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:26:14,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:26:14,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:26:14,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:26:14,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:26:14,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:26:14,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:26:14,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:26:14,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:26:14,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:26:14,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:26:14,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:26:14,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:26:14,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:26:14,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:26:14,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:26:14,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:26:14,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:26:14,158 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:26:14,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:26:14,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:26:14,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:26:14,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:26:14,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:26:14,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:26:14,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:26:14,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:26:14,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:26:14,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:26:14,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:26:14,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:26:14,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:26:14,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:26:14,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:26:14,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:14,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:26:14,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:26:14,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:26:14,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:26:14,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:26:14,165 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:26:14,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:26:14,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:26:14,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-07-20 22:26:14,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:26:14,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:26:14,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:26:14,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:26:14,432 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:26:14,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-20 22:26:14,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0399feac8/2b974fe9f0824bc994b5c46716e97721/FLAG63f7c1c3c [2022-07-20 22:26:14,873 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:26:14,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-20 22:26:14,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0399feac8/2b974fe9f0824bc994b5c46716e97721/FLAG63f7c1c3c [2022-07-20 22:26:14,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0399feac8/2b974fe9f0824bc994b5c46716e97721 [2022-07-20 22:26:14,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:26:14,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:26:14,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:14,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:26:14,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:26:14,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:14" (1/1) ... [2022-07-20 22:26:14,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6296e925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:14, skipping insertion in model container [2022-07-20 22:26:14,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:14" (1/1) ... [2022-07-20 22:26:14,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:26:14,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:26:15,128 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_1-3a.c.cil.c[730,743] [2022-07-20 22:26:15,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:15,228 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:26:15,240 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_1-3a.c.cil.c[730,743] [2022-07-20 22:26:15,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:15,311 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:26:15,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15 WrapperNode [2022-07-20 22:26:15,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:15,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:15,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:26:15,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:26:15,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,381 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 213 [2022-07-20 22:26:15,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:15,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:26:15,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:26:15,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:26:15,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:26:15,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:26:15,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:26:15,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:26:15,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (1/1) ... [2022-07-20 22:26:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:15,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:26:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:26:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:26:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:26:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-20 22:26:15,504 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-20 22:26:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:26:15,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:26:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 22:26:15,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 22:26:15,627 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:26:15,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:26:16,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:26:16,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:26:16,069 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 22:26:16,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:16 BoogieIcfgContainer [2022-07-20 22:26:16,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:26:16,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:26:16,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:26:16,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:26:16,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:26:14" (1/3) ... [2022-07-20 22:26:16,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70603ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:16, skipping insertion in model container [2022-07-20 22:26:16,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:15" (2/3) ... [2022-07-20 22:26:16,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70603ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:16, skipping insertion in model container [2022-07-20 22:26:16,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:16" (3/3) ... [2022-07-20 22:26:16,079 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-07-20 22:26:16,093 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:26:16,093 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:26:16,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:26:16,173 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@2c8291a0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ed9b4ec [2022-07-20 22:26:16,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:26:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 22:26:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 22:26:16,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:16,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:16,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 814386124, now seen corresponding path program 1 times [2022-07-20 22:26:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:16,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865231302] [2022-07-20 22:26:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:16,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865231302] [2022-07-20 22:26:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865231302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:16,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:16,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689874033] [2022-07-20 22:26:16,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:16,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:16,527 INFO L87 Difference]: Start difference. First operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:16,663 INFO L93 Difference]: Finished difference Result 276 states and 481 transitions. [2022-07-20 22:26:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-20 22:26:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:16,675 INFO L225 Difference]: With dead ends: 276 [2022-07-20 22:26:16,675 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 22:26:16,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:16,682 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 110 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:16,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 419 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 22:26:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2022-07-20 22:26:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.5) internal successors, (198), 134 states have internal predecessors, (198), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 22:26:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 221 transitions. [2022-07-20 22:26:16,731 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 221 transitions. Word has length 37 [2022-07-20 22:26:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:16,732 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 221 transitions. [2022-07-20 22:26:16,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 221 transitions. [2022-07-20 22:26:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 22:26:16,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:16,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:16,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:26:16,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2116308935, now seen corresponding path program 1 times [2022-07-20 22:26:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:16,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665673196] [2022-07-20 22:26:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665673196] [2022-07-20 22:26:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665673196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:16,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:16,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248025948] [2022-07-20 22:26:16,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:16,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:16,811 INFO L87 Difference]: Start difference. First operand 147 states and 221 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:16,876 INFO L93 Difference]: Finished difference Result 275 states and 414 transitions. [2022-07-20 22:26:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-20 22:26:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:16,879 INFO L225 Difference]: With dead ends: 275 [2022-07-20 22:26:16,879 INFO L226 Difference]: Without dead ends: 236 [2022-07-20 22:26:16,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:16,881 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 102 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:16,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 436 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-20 22:26:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-07-20 22:26:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 198 states have (on average 1.4595959595959596) internal successors, (289), 201 states have internal predecessors, (289), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 22:26:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 323 transitions. [2022-07-20 22:26:16,900 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 323 transitions. Word has length 39 [2022-07-20 22:26:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:16,901 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 323 transitions. [2022-07-20 22:26:16,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 323 transitions. [2022-07-20 22:26:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:26:16,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:16,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:26:16,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1123536244, now seen corresponding path program 1 times [2022-07-20 22:26:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924170978] [2022-07-20 22:26:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:16,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924170978] [2022-07-20 22:26:17,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924170978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:17,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:17,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417864351] [2022-07-20 22:26:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:17,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:17,038 INFO L87 Difference]: Start difference. First operand 219 states and 323 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:17,126 INFO L93 Difference]: Finished difference Result 353 states and 525 transitions. [2022-07-20 22:26:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 22:26:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:17,129 INFO L225 Difference]: With dead ends: 353 [2022-07-20 22:26:17,129 INFO L226 Difference]: Without dead ends: 321 [2022-07-20 22:26:17,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:17,131 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 206 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:17,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 702 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-20 22:26:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-07-20 22:26:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.4615384615384615) internal successors, (361), 251 states have internal predecessors, (361), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 22:26:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 405 transitions. [2022-07-20 22:26:17,158 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 405 transitions. Word has length 40 [2022-07-20 22:26:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:17,158 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 405 transitions. [2022-07-20 22:26:17,159 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) [2022-07-20 22:26:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 405 transitions. [2022-07-20 22:26:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:26:17,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:17,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:26:17,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 102467890, now seen corresponding path program 1 times [2022-07-20 22:26:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:17,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506663107] [2022-07-20 22:26:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:17,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:17,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506663107] [2022-07-20 22:26:17,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506663107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:17,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:17,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047766564] [2022-07-20 22:26:17,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:17,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:17,219 INFO L87 Difference]: Start difference. First operand 273 states and 405 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:17,273 INFO L93 Difference]: Finished difference Result 294 states and 435 transitions. [2022-07-20 22:26:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 22:26:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:17,277 INFO L225 Difference]: With dead ends: 294 [2022-07-20 22:26:17,277 INFO L226 Difference]: Without dead ends: 287 [2022-07-20 22:26:17,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:17,283 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:17,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 402 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-20 22:26:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-07-20 22:26:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 252 states have internal predecessors, (362), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 22:26:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 406 transitions. [2022-07-20 22:26:17,301 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 406 transitions. Word has length 40 [2022-07-20 22:26:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:17,301 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 406 transitions. [2022-07-20 22:26:17,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 406 transitions. [2022-07-20 22:26:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 22:26:17,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:17,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:17,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:26:17,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 991244780, now seen corresponding path program 1 times [2022-07-20 22:26:17,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:17,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188227465] [2022-07-20 22:26:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:17,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188227465] [2022-07-20 22:26:17,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188227465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:17,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371209313] [2022-07-20 22:26:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:17,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:17,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:17,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:26:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:26:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:26:17,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:17,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371209313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:17,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:17,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-07-20 22:26:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451677993] [2022-07-20 22:26:17,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:17,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 22:26:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 22:26:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:17,957 INFO L87 Difference]: Start difference. First operand 274 states and 406 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 22:26:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:18,635 INFO L93 Difference]: Finished difference Result 561 states and 855 transitions. [2022-07-20 22:26:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:26:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-07-20 22:26:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:18,653 INFO L225 Difference]: With dead ends: 561 [2022-07-20 22:26:18,653 INFO L226 Difference]: Without dead ends: 290 [2022-07-20 22:26:18,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-07-20 22:26:18,659 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 467 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:18,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1545 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:26:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-20 22:26:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-07-20 22:26:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 156 states have internal predecessors, (220), 15 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-20 22:26:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2022-07-20 22:26:18,675 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 41 [2022-07-20 22:26:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:18,677 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2022-07-20 22:26:18,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 22:26:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2022-07-20 22:26:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:18,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:18,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:18,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:18,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 493844178, now seen corresponding path program 1 times [2022-07-20 22:26:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596964645] [2022-07-20 22:26:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:18,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:18,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596964645] [2022-07-20 22:26:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596964645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:18,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:18,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646268085] [2022-07-20 22:26:18,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:18,972 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:19,030 INFO L93 Difference]: Finished difference Result 205 states and 303 transitions. [2022-07-20 22:26:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-20 22:26:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:19,032 INFO L225 Difference]: With dead ends: 205 [2022-07-20 22:26:19,032 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 22:26:19,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:19,033 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 174 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:19,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 576 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 22:26:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-07-20 22:26:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 147 states have internal predecessors, (206), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-20 22:26:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2022-07-20 22:26:19,041 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 43 [2022-07-20 22:26:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:19,042 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2022-07-20 22:26:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2022-07-20 22:26:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:19,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:19,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:26:19,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1964302618, now seen corresponding path program 1 times [2022-07-20 22:26:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:19,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740681452] [2022-07-20 22:26:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740681452] [2022-07-20 22:26:19,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740681452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:19,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:19,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:19,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927561849] [2022-07-20 22:26:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:19,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:19,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:19,092 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:19,138 INFO L93 Difference]: Finished difference Result 185 states and 268 transitions. [2022-07-20 22:26:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:19,143 INFO L225 Difference]: With dead ends: 185 [2022-07-20 22:26:19,143 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 22:26:19,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:19,146 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:19,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 536 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 22:26:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-07-20 22:26:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 146 states have (on average 1.417808219178082) internal successors, (207), 148 states have internal predecessors, (207), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-20 22:26:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 238 transitions. [2022-07-20 22:26:19,154 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 238 transitions. Word has length 44 [2022-07-20 22:26:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:19,154 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 238 transitions. [2022-07-20 22:26:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 238 transitions. [2022-07-20 22:26:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:19,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:19,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:26:19,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash -189295256, now seen corresponding path program 1 times [2022-07-20 22:26:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:19,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704639494] [2022-07-20 22:26:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:19,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:19,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704639494] [2022-07-20 22:26:19,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704639494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:19,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:19,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957586145] [2022-07-20 22:26:19,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:19,202 INFO L87 Difference]: Start difference. First operand 164 states and 238 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:19,259 INFO L93 Difference]: Finished difference Result 179 states and 258 transitions. [2022-07-20 22:26:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:19,260 INFO L225 Difference]: With dead ends: 179 [2022-07-20 22:26:19,260 INFO L226 Difference]: Without dead ends: 172 [2022-07-20 22:26:19,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:19,261 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 42 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:19,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 678 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-20 22:26:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2022-07-20 22:26:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 144 states have (on average 1.4097222222222223) internal successors, (203), 146 states have internal predecessors, (203), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-20 22:26:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-07-20 22:26:19,269 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-07-20 22:26:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:19,269 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-07-20 22:26:19,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-07-20 22:26:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:19,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:19,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:19,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:26:19,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1232722459, now seen corresponding path program 1 times [2022-07-20 22:26:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:19,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227669796] [2022-07-20 22:26:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227669796] [2022-07-20 22:26:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227669796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304996412] [2022-07-20 22:26:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:19,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:19,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:26:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:26:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:26:19,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304996412] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:19,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:19,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2022-07-20 22:26:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485335004] [2022-07-20 22:26:19,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:19,685 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:19,760 INFO L93 Difference]: Finished difference Result 392 states and 564 transitions. [2022-07-20 22:26:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:19,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:19,762 INFO L225 Difference]: With dead ends: 392 [2022-07-20 22:26:19,763 INFO L226 Difference]: Without dead ends: 280 [2022-07-20 22:26:19,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:19,765 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 85 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:19,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 707 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-20 22:26:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-07-20 22:26:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 250 states have (on average 1.392) internal successors, (348), 251 states have internal predecessors, (348), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-20 22:26:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 395 transitions. [2022-07-20 22:26:19,778 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 395 transitions. Word has length 45 [2022-07-20 22:26:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:19,779 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 395 transitions. [2022-07-20 22:26:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 395 transitions. [2022-07-20 22:26:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:19,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:19,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:19,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 22:26:19,995 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,SelfDestructingSolverStorable8 [2022-07-20 22:26:19,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 221605209, now seen corresponding path program 1 times [2022-07-20 22:26:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788175993] [2022-07-20 22:26:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:19,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:20,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788175993] [2022-07-20 22:26:20,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788175993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:20,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546685996] [2022-07-20 22:26:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:20,034 INFO L87 Difference]: Start difference. First operand 276 states and 395 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,096 INFO L93 Difference]: Finished difference Result 422 states and 604 transitions. [2022-07-20 22:26:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:20,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,098 INFO L225 Difference]: With dead ends: 422 [2022-07-20 22:26:20,098 INFO L226 Difference]: Without dead ends: 382 [2022-07-20 22:26:20,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:20,099 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 186 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 538 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-20 22:26:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 311. [2022-07-20 22:26:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 284 states have (on average 1.3873239436619718) internal successors, (394), 284 states have internal predecessors, (394), 22 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (27), 24 states have call predecessors, (27), 21 states have call successors, (27) [2022-07-20 22:26:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 443 transitions. [2022-07-20 22:26:20,112 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 443 transitions. Word has length 45 [2022-07-20 22:26:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,112 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 443 transitions. [2022-07-20 22:26:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 443 transitions. [2022-07-20 22:26:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:20,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:20,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:26:20,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2044635565, now seen corresponding path program 1 times [2022-07-20 22:26:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462214366] [2022-07-20 22:26:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:20,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462214366] [2022-07-20 22:26:20,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462214366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:20,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837645234] [2022-07-20 22:26:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:20,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:20,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:26:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:26:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:20,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:20,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837645234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:20,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-20 22:26:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779502676] [2022-07-20 22:26:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:20,342 INFO L87 Difference]: Start difference. First operand 311 states and 443 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,498 INFO L93 Difference]: Finished difference Result 613 states and 868 transitions. [2022-07-20 22:26:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,501 INFO L225 Difference]: With dead ends: 613 [2022-07-20 22:26:20,501 INFO L226 Difference]: Without dead ends: 587 [2022-07-20 22:26:20,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:20,502 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 181 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 745 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-07-20 22:26:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 467. [2022-07-20 22:26:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 428 states have (on average 1.3574766355140186) internal successors, (581), 429 states have internal predecessors, (581), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2022-07-20 22:26:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 654 transitions. [2022-07-20 22:26:20,520 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 654 transitions. Word has length 48 [2022-07-20 22:26:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,521 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 654 transitions. [2022-07-20 22:26:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 654 transitions. [2022-07-20 22:26:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:20,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:20,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:20,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:20,745 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1343570987, now seen corresponding path program 1 times [2022-07-20 22:26:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:20,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786726816] [2022-07-20 22:26:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:20,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786726816] [2022-07-20 22:26:20,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786726816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:20,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890606382] [2022-07-20 22:26:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:20,785 INFO L87 Difference]: Start difference. First operand 467 states and 654 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,835 INFO L93 Difference]: Finished difference Result 491 states and 685 transitions. [2022-07-20 22:26:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,837 INFO L225 Difference]: With dead ends: 491 [2022-07-20 22:26:20,837 INFO L226 Difference]: Without dead ends: 451 [2022-07-20 22:26:20,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:20,838 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 38 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-20 22:26:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 443. [2022-07-20 22:26:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 404 states have (on average 1.3514851485148516) internal successors, (546), 405 states have internal predecessors, (546), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-07-20 22:26:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 618 transitions. [2022-07-20 22:26:20,854 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 618 transitions. Word has length 48 [2022-07-20 22:26:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,855 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 618 transitions. [2022-07-20 22:26:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 618 transitions. [2022-07-20 22:26:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:20,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:26:20,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 502143871, now seen corresponding path program 1 times [2022-07-20 22:26:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:20,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578041615] [2022-07-20 22:26:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578041615] [2022-07-20 22:26:20,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578041615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:20,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:20,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:20,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106296904] [2022-07-20 22:26:20,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:20,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:20,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:20,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:20,886 INFO L87 Difference]: Start difference. First operand 443 states and 618 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:20,955 INFO L93 Difference]: Finished difference Result 840 states and 1171 transitions. [2022-07-20 22:26:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:20,957 INFO L225 Difference]: With dead ends: 840 [2022-07-20 22:26:20,958 INFO L226 Difference]: Without dead ends: 524 [2022-07-20 22:26:20,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:20,959 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 75 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:20,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 426 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-07-20 22:26:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 448. [2022-07-20 22:26:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 409 states have (on average 1.3227383863080684) internal successors, (541), 410 states have internal predecessors, (541), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-07-20 22:26:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 613 transitions. [2022-07-20 22:26:20,975 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 613 transitions. Word has length 48 [2022-07-20 22:26:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:20,975 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 613 transitions. [2022-07-20 22:26:20,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 613 transitions. [2022-07-20 22:26:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:20,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:20,977 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:20,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:26:20,977 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -50490859, now seen corresponding path program 1 times [2022-07-20 22:26:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:20,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812508308] [2022-07-20 22:26:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:20,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:21,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812508308] [2022-07-20 22:26:21,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812508308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:21,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:21,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:26:21,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174177008] [2022-07-20 22:26:21,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:21,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:21,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:21,099 INFO L87 Difference]: Start difference. First operand 448 states and 613 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:21,302 INFO L93 Difference]: Finished difference Result 622 states and 846 transitions. [2022-07-20 22:26:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-07-20 22:26:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:21,304 INFO L225 Difference]: With dead ends: 622 [2022-07-20 22:26:21,305 INFO L226 Difference]: Without dead ends: 533 [2022-07-20 22:26:21,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:26:21,305 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 122 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:21,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1660 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-20 22:26:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 445. [2022-07-20 22:26:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 408 states have internal predecessors, (538), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (36), 34 states have call predecessors, (36), 32 states have call successors, (36) [2022-07-20 22:26:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 608 transitions. [2022-07-20 22:26:21,320 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 608 transitions. Word has length 48 [2022-07-20 22:26:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:21,321 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 608 transitions. [2022-07-20 22:26:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 608 transitions. [2022-07-20 22:26:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 22:26:21,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:21,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:26:21,322 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1297236278, now seen corresponding path program 1 times [2022-07-20 22:26:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:21,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216008450] [2022-07-20 22:26:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:21,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:21,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216008450] [2022-07-20 22:26:21,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216008450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480221185] [2022-07-20 22:26:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:21,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:26:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 22:26:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:21,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480221185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:21,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:21,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-07-20 22:26:21,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314247718] [2022-07-20 22:26:21,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:21,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:26:21,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:26:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:21,659 INFO L87 Difference]: Start difference. First operand 445 states and 608 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:22,233 INFO L93 Difference]: Finished difference Result 1186 states and 1619 transitions. [2022-07-20 22:26:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-07-20 22:26:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:22,236 INFO L225 Difference]: With dead ends: 1186 [2022-07-20 22:26:22,237 INFO L226 Difference]: Without dead ends: 808 [2022-07-20 22:26:22,238 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 [2022-07-20 22:26:22,238 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 551 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:22,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 2129 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:26:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-20 22:26:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 644. [2022-07-20 22:26:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 589 states have (on average 1.2767402376910018) internal successors, (752), 592 states have internal predecessors, (752), 49 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (56), 50 states have call predecessors, (56), 46 states have call successors, (56) [2022-07-20 22:26:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 857 transitions. [2022-07-20 22:26:22,269 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 857 transitions. Word has length 49 [2022-07-20 22:26:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:22,269 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 857 transitions. [2022-07-20 22:26:22,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 857 transitions. [2022-07-20 22:26:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:22,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:22,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:22,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 22:26:22,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2012462520, now seen corresponding path program 1 times [2022-07-20 22:26:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311281535] [2022-07-20 22:26:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:26:22,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311281535] [2022-07-20 22:26:22,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311281535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041692417] [2022-07-20 22:26:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:22,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:22,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:22,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:26:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 22:26:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:23,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:23,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041692417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:23,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:23,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-07-20 22:26:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183883699] [2022-07-20 22:26:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-07-20 22:26:23,095 INFO L87 Difference]: Start difference. First operand 644 states and 857 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:23,378 INFO L93 Difference]: Finished difference Result 842 states and 1127 transitions. [2022-07-20 22:26:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-20 22:26:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:23,381 INFO L225 Difference]: With dead ends: 842 [2022-07-20 22:26:23,381 INFO L226 Difference]: Without dead ends: 823 [2022-07-20 22:26:23,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-20 22:26:23,382 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 284 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:23,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1167 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-20 22:26:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 673. [2022-07-20 22:26:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 616 states have (on average 1.271103896103896) internal successors, (783), 620 states have internal predecessors, (783), 51 states have call successors, (51), 3 states have call predecessors, (51), 5 states have return successors, (58), 52 states have call predecessors, (58), 48 states have call successors, (58) [2022-07-20 22:26:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 892 transitions. [2022-07-20 22:26:23,412 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 892 transitions. Word has length 50 [2022-07-20 22:26:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:23,412 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 892 transitions. [2022-07-20 22:26:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 892 transitions. [2022-07-20 22:26:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 22:26:23,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:23,413 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:23,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:23,628 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,SelfDestructingSolverStorable15 [2022-07-20 22:26:23,629 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1388940720, now seen corresponding path program 1 times [2022-07-20 22:26:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:23,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479278646] [2022-07-20 22:26:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:23,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479278646] [2022-07-20 22:26:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479278646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:23,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:23,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384184801] [2022-07-20 22:26:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:23,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:23,678 INFO L87 Difference]: Start difference. First operand 673 states and 892 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:23,784 INFO L93 Difference]: Finished difference Result 726 states and 965 transitions. [2022-07-20 22:26:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-20 22:26:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:23,787 INFO L225 Difference]: With dead ends: 726 [2022-07-20 22:26:23,788 INFO L226 Difference]: Without dead ends: 724 [2022-07-20 22:26:23,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:23,789 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 78 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 840 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-20 22:26:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 682. [2022-07-20 22:26:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 621 states have (on average 1.2689210950080516) internal successors, (788), 628 states have internal predecessors, (788), 54 states have call successors, (54), 4 states have call predecessors, (54), 6 states have return successors, (61), 52 states have call predecessors, (61), 51 states have call successors, (61) [2022-07-20 22:26:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 903 transitions. [2022-07-20 22:26:23,832 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 903 transitions. Word has length 51 [2022-07-20 22:26:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 903 transitions. [2022-07-20 22:26:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 903 transitions. [2022-07-20 22:26:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:26:23,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:23,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:26:23,835 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1800205628, now seen corresponding path program 1 times [2022-07-20 22:26:23,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:23,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384374359] [2022-07-20 22:26:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384374359] [2022-07-20 22:26:23,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384374359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:23,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:23,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689856554] [2022-07-20 22:26:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:23,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:23,870 INFO L87 Difference]: Start difference. First operand 682 states and 903 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:23,928 INFO L93 Difference]: Finished difference Result 699 states and 926 transitions. [2022-07-20 22:26:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:23,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-20 22:26:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:23,931 INFO L225 Difference]: With dead ends: 699 [2022-07-20 22:26:23,931 INFO L226 Difference]: Without dead ends: 673 [2022-07-20 22:26:23,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:23,932 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 38 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:23,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 516 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-20 22:26:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 567. [2022-07-20 22:26:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 515 states have (on average 1.2757281553398059) internal successors, (657), 521 states have internal predecessors, (657), 45 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (52), 43 states have call predecessors, (52), 42 states have call successors, (52) [2022-07-20 22:26:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 754 transitions. [2022-07-20 22:26:23,957 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 754 transitions. Word has length 52 [2022-07-20 22:26:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:23,957 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 754 transitions. [2022-07-20 22:26:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 754 transitions. [2022-07-20 22:26:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 22:26:23,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:23,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:26:23,959 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2067118233, now seen corresponding path program 1 times [2022-07-20 22:26:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713853035] [2022-07-20 22:26:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 22:26:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:24,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713853035] [2022-07-20 22:26:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713853035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:24,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:24,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:24,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533093354] [2022-07-20 22:26:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:24,057 INFO L87 Difference]: Start difference. First operand 567 states and 754 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:24,304 INFO L93 Difference]: Finished difference Result 1253 states and 1690 transitions. [2022-07-20 22:26:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-20 22:26:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:24,309 INFO L225 Difference]: With dead ends: 1253 [2022-07-20 22:26:24,309 INFO L226 Difference]: Without dead ends: 1047 [2022-07-20 22:26:24,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:24,311 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 184 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:24,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1360 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-07-20 22:26:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 916. [2022-07-20 22:26:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 840 states have (on average 1.2642857142857142) internal successors, (1062), 847 states have internal predecessors, (1062), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-07-20 22:26:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1207 transitions. [2022-07-20 22:26:24,358 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1207 transitions. Word has length 57 [2022-07-20 22:26:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:24,359 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1207 transitions. [2022-07-20 22:26:24,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1207 transitions. [2022-07-20 22:26:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:24,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:24,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:24,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:26:24,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1155927203, now seen corresponding path program 1 times [2022-07-20 22:26:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996848203] [2022-07-20 22:26:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:24,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996848203] [2022-07-20 22:26:24,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996848203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026853068] [2022-07-20 22:26:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:24,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:24,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:24,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:26:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:26:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:24,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:24,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026853068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:24,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:24,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-20 22:26:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5526532] [2022-07-20 22:26:24,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:26:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:26:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:24,638 INFO L87 Difference]: Start difference. First operand 916 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:24,916 INFO L93 Difference]: Finished difference Result 1645 states and 2177 transitions. [2022-07-20 22:26:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-20 22:26:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:24,922 INFO L225 Difference]: With dead ends: 1645 [2022-07-20 22:26:24,922 INFO L226 Difference]: Without dead ends: 1543 [2022-07-20 22:26:24,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:24,923 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 301 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:24,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 2254 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-07-20 22:26:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 928. [2022-07-20 22:26:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 852 states have (on average 1.2629107981220657) internal successors, (1076), 859 states have internal predecessors, (1076), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-07-20 22:26:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1221 transitions. [2022-07-20 22:26:24,997 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1221 transitions. Word has length 58 [2022-07-20 22:26:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:24,997 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1221 transitions. [2022-07-20 22:26:24,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1221 transitions. [2022-07-20 22:26:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:24,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:24,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:25,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:25,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:25,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1021913697, now seen corresponding path program 1 times [2022-07-20 22:26:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17918680] [2022-07-20 22:26:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 22:26:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:25,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:25,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17918680] [2022-07-20 22:26:25,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17918680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:25,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093016934] [2022-07-20 22:26:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:25,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:25,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:25,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:25,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:26:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:25,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:25,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:25,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093016934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:25,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:25,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-20 22:26:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801230576] [2022-07-20 22:26:25,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:25,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 22:26:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 22:26:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:26:25,538 INFO L87 Difference]: Start difference. First operand 928 states and 1221 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:25,938 INFO L93 Difference]: Finished difference Result 2168 states and 2928 transitions. [2022-07-20 22:26:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:26:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-20 22:26:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:25,947 INFO L225 Difference]: With dead ends: 2168 [2022-07-20 22:26:25,947 INFO L226 Difference]: Without dead ends: 2046 [2022-07-20 22:26:25,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-20 22:26:25,949 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 257 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:25,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 3240 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-20 22:26:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 908. [2022-07-20 22:26:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 833 states have (on average 1.2665066026410565) internal successors, (1055), 842 states have internal predecessors, (1055), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (72), 65 states have call predecessors, (72), 65 states have call successors, (72) [2022-07-20 22:26:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1195 transitions. [2022-07-20 22:26:26,000 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1195 transitions. Word has length 58 [2022-07-20 22:26:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,000 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1195 transitions. [2022-07-20 22:26:26,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1195 transitions. [2022-07-20 22:26:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:26:26,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:26,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:26,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:26,217 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1110635549, now seen corresponding path program 1 times [2022-07-20 22:26:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:26,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678198198] [2022-07-20 22:26:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678198198] [2022-07-20 22:26:26,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678198198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:26,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:26,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:26:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954087695] [2022-07-20 22:26:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:26,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:26,277 INFO L87 Difference]: Start difference. First operand 908 states and 1195 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:26,418 INFO L93 Difference]: Finished difference Result 958 states and 1256 transitions. [2022-07-20 22:26:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-07-20 22:26:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:26,421 INFO L225 Difference]: With dead ends: 958 [2022-07-20 22:26:26,421 INFO L226 Difference]: Without dead ends: 752 [2022-07-20 22:26:26,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:26,422 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 44 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:26,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 869 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-20 22:26:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2022-07-20 22:26:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 679 states have (on average 1.2709867452135493) internal successors, (863), 689 states have internal predecessors, (863), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-07-20 22:26:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 981 transitions. [2022-07-20 22:26:26,468 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 981 transitions. Word has length 58 [2022-07-20 22:26:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,469 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 981 transitions. [2022-07-20 22:26:26,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 981 transitions. [2022-07-20 22:26:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 22:26:26,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:26:26,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1691045042, now seen corresponding path program 1 times [2022-07-20 22:26:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:26,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261869560] [2022-07-20 22:26:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 22:26:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261869560] [2022-07-20 22:26:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261869560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:26,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:26,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925239894] [2022-07-20 22:26:26,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:26,512 INFO L87 Difference]: Start difference. First operand 744 states and 981 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:26,601 INFO L93 Difference]: Finished difference Result 1373 states and 1824 transitions. [2022-07-20 22:26:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-20 22:26:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:26,605 INFO L225 Difference]: With dead ends: 1373 [2022-07-20 22:26:26,605 INFO L226 Difference]: Without dead ends: 764 [2022-07-20 22:26:26,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:26,607 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 55 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:26,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 355 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-20 22:26:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 745. [2022-07-20 22:26:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 680 states have (on average 1.2705882352941176) internal successors, (864), 690 states have internal predecessors, (864), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-07-20 22:26:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 982 transitions. [2022-07-20 22:26:26,638 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 982 transitions. Word has length 59 [2022-07-20 22:26:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:26,638 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 982 transitions. [2022-07-20 22:26:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 982 transitions. [2022-07-20 22:26:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:26:26,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:26,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:26:26,640 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1304426309, now seen corresponding path program 1 times [2022-07-20 22:26:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057180601] [2022-07-20 22:26:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:26,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057180601] [2022-07-20 22:26:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057180601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323884268] [2022-07-20 22:26:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:26,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:26,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:26,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:26,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:26:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 22:26:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:27,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:27,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323884268] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:27,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:27,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 26 [2022-07-20 22:26:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460370836] [2022-07-20 22:26:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:27,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:27,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:27,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:26:27,660 INFO L87 Difference]: Start difference. First operand 745 states and 982 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:28,151 INFO L93 Difference]: Finished difference Result 1182 states and 1559 transitions. [2022-07-20 22:26:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:26:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-07-20 22:26:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:28,156 INFO L225 Difference]: With dead ends: 1182 [2022-07-20 22:26:28,156 INFO L226 Difference]: Without dead ends: 1147 [2022-07-20 22:26:28,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 22:26:28,157 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 242 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:28,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1707 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-20 22:26:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1000. [2022-07-20 22:26:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 912 states have (on average 1.2763157894736843) internal successors, (1164), 923 states have internal predecessors, (1164), 81 states have call successors, (81), 4 states have call predecessors, (81), 6 states have return successors, (84), 77 states have call predecessors, (84), 78 states have call successors, (84) [2022-07-20 22:26:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1329 transitions. [2022-07-20 22:26:28,221 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1329 transitions. Word has length 60 [2022-07-20 22:26:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:28,221 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1329 transitions. [2022-07-20 22:26:28,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1329 transitions. [2022-07-20 22:26:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:28,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:28,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:28,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:28,447 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,SelfDestructingSolverStorable23 [2022-07-20 22:26:28,448 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -339625375, now seen corresponding path program 1 times [2022-07-20 22:26:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615292728] [2022-07-20 22:26:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615292728] [2022-07-20 22:26:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615292728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:28,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:28,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307478377] [2022-07-20 22:26:28,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:28,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:28,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:28,498 INFO L87 Difference]: Start difference. First operand 1000 states and 1329 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:28,616 INFO L93 Difference]: Finished difference Result 1038 states and 1377 transitions. [2022-07-20 22:26:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-20 22:26:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:28,620 INFO L225 Difference]: With dead ends: 1038 [2022-07-20 22:26:28,620 INFO L226 Difference]: Without dead ends: 1034 [2022-07-20 22:26:28,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:28,621 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:28,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-07-20 22:26:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 995. [2022-07-20 22:26:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 906 states have (on average 1.2759381898454747) internal successors, (1156), 919 states have internal predecessors, (1156), 81 states have call successors, (81), 5 states have call predecessors, (81), 7 states have return successors, (84), 75 states have call predecessors, (84), 78 states have call successors, (84) [2022-07-20 22:26:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1321 transitions. [2022-07-20 22:26:28,670 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1321 transitions. Word has length 62 [2022-07-20 22:26:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:28,671 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1321 transitions. [2022-07-20 22:26:28,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1321 transitions. [2022-07-20 22:26:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:28,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:28,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:28,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:26:28,673 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash -282367073, now seen corresponding path program 1 times [2022-07-20 22:26:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:28,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438152974] [2022-07-20 22:26:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 22:26:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:28,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438152974] [2022-07-20 22:26:28,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438152974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:28,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194091318] [2022-07-20 22:26:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:28,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:28,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:28,721 INFO L87 Difference]: Start difference. First operand 995 states and 1321 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:28,854 INFO L93 Difference]: Finished difference Result 1028 states and 1362 transitions. [2022-07-20 22:26:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-20 22:26:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:28,858 INFO L225 Difference]: With dead ends: 1028 [2022-07-20 22:26:28,858 INFO L226 Difference]: Without dead ends: 1014 [2022-07-20 22:26:28,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:28,859 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:28,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-20 22:26:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 980. [2022-07-20 22:26:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2706935123042506) internal successors, (1136), 905 states have internal predecessors, (1136), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-20 22:26:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1294 transitions. [2022-07-20 22:26:28,906 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1294 transitions. Word has length 62 [2022-07-20 22:26:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:28,906 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1294 transitions. [2022-07-20 22:26:28,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 22:26:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1294 transitions. [2022-07-20 22:26:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:28,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:28,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:28,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:26:28,908 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1649289642, now seen corresponding path program 1 times [2022-07-20 22:26:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94846967] [2022-07-20 22:26:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-20 22:26:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:29,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94846967] [2022-07-20 22:26:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94846967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125080620] [2022-07-20 22:26:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:29,047 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:29,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:26:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 22:26:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 22:26:29,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:29,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125080620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:29,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:29,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-20 22:26:29,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285427268] [2022-07-20 22:26:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:29,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:29,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:29,241 INFO L87 Difference]: Start difference. First operand 980 states and 1294 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:29,441 INFO L93 Difference]: Finished difference Result 1229 states and 1635 transitions. [2022-07-20 22:26:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-07-20 22:26:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:29,446 INFO L225 Difference]: With dead ends: 1229 [2022-07-20 22:26:29,446 INFO L226 Difference]: Without dead ends: 1213 [2022-07-20 22:26:29,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:29,447 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 218 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:29,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 527 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-20 22:26:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 980. [2022-07-20 22:26:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2684563758389262) internal successors, (1134), 905 states have internal predecessors, (1134), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-20 22:26:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1292 transitions. [2022-07-20 22:26:29,500 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1292 transitions. Word has length 62 [2022-07-20 22:26:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:29,500 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1292 transitions. [2022-07-20 22:26:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 22:26:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1292 transitions. [2022-07-20 22:26:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:29,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:29,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:29,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 22:26:29,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 22:26:29,715 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1828096048, now seen corresponding path program 1 times [2022-07-20 22:26:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684920023] [2022-07-20 22:26:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:29,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:29,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684920023] [2022-07-20 22:26:29,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684920023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:29,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:29,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:26:29,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742222796] [2022-07-20 22:26:29,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:29,780 INFO L87 Difference]: Start difference. First operand 980 states and 1292 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:30,031 INFO L93 Difference]: Finished difference Result 1643 states and 2220 transitions. [2022-07-20 22:26:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:26:30,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 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 62 [2022-07-20 22:26:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:30,035 INFO L225 Difference]: With dead ends: 1643 [2022-07-20 22:26:30,035 INFO L226 Difference]: Without dead ends: 1189 [2022-07-20 22:26:30,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:30,037 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 211 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:30,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1060 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-07-20 22:26:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2022-07-20 22:26:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 969 states have (on average 1.2445820433436532) internal successors, (1206), 980 states have internal predecessors, (1206), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-20 22:26:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1364 transitions. [2022-07-20 22:26:30,095 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1364 transitions. Word has length 62 [2022-07-20 22:26:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:30,095 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1364 transitions. [2022-07-20 22:26:30,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1364 transitions. [2022-07-20 22:26:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:26:30,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:30,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:30,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:26:30,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1826249006, now seen corresponding path program 1 times [2022-07-20 22:26:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483997011] [2022-07-20 22:26:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:30,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483997011] [2022-07-20 22:26:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483997011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:30,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:30,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 22:26:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926609789] [2022-07-20 22:26:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:26:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:26:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:30,297 INFO L87 Difference]: Start difference. First operand 1055 states and 1364 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:30,856 INFO L93 Difference]: Finished difference Result 1118 states and 1440 transitions. [2022-07-20 22:26:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-20 22:26:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:30,860 INFO L225 Difference]: With dead ends: 1118 [2022-07-20 22:26:30,860 INFO L226 Difference]: Without dead ends: 1116 [2022-07-20 22:26:30,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:26:30,862 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 380 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:30,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1998 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:26:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-20 22:26:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1065. [2022-07-20 22:26:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 977 states have (on average 1.2425793244626406) internal successors, (1214), 989 states have internal predecessors, (1214), 79 states have call successors, (79), 6 states have call predecessors, (79), 8 states have return successors, (81), 74 states have call predecessors, (81), 75 states have call successors, (81) [2022-07-20 22:26:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1374 transitions. [2022-07-20 22:26:30,916 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1374 transitions. Word has length 62 [2022-07-20 22:26:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:30,916 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1374 transitions. [2022-07-20 22:26:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1374 transitions. [2022-07-20 22:26:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:30,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:30,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:26:30,919 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -654456506, now seen corresponding path program 1 times [2022-07-20 22:26:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:30,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581970840] [2022-07-20 22:26:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581970840] [2022-07-20 22:26:30,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581970840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243327639] [2022-07-20 22:26:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:30,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:30,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:30,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:26:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:31,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243327639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:31,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-20 22:26:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257521623] [2022-07-20 22:26:31,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:31,168 INFO L87 Difference]: Start difference. First operand 1065 states and 1374 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:31,603 INFO L93 Difference]: Finished difference Result 3170 states and 4156 transitions. [2022-07-20 22:26:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:26:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:31,613 INFO L225 Difference]: With dead ends: 3170 [2022-07-20 22:26:31,613 INFO L226 Difference]: Without dead ends: 2732 [2022-07-20 22:26:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:31,616 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 286 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1824 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2022-07-20 22:26:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1170. [2022-07-20 22:26:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1080 states have (on average 1.2361111111111112) internal successors, (1335), 1090 states have internal predecessors, (1335), 80 states have call successors, (80), 6 states have call predecessors, (80), 9 states have return successors, (88), 78 states have call predecessors, (88), 76 states have call successors, (88) [2022-07-20 22:26:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1503 transitions. [2022-07-20 22:26:31,687 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1503 transitions. Word has length 65 [2022-07-20 22:26:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:31,687 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1503 transitions. [2022-07-20 22:26:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1503 transitions. [2022-07-20 22:26:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:31,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:31,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:31,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:31,904 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1951567048, now seen corresponding path program 1 times [2022-07-20 22:26:31,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:31,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978261685] [2022-07-20 22:26:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:31,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:31,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:31,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978261685] [2022-07-20 22:26:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978261685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104008505] [2022-07-20 22:26:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:31,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:31,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:31,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:26:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:32,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:26:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:32,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:32,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104008505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:32,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:32,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-07-20 22:26:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135177219] [2022-07-20 22:26:32,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 22:26:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 22:26:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:32,316 INFO L87 Difference]: Start difference. First operand 1170 states and 1503 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:33,222 INFO L93 Difference]: Finished difference Result 3318 states and 4373 transitions. [2022-07-20 22:26:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 22:26:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-20 22:26:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:33,232 INFO L225 Difference]: With dead ends: 3318 [2022-07-20 22:26:33,232 INFO L226 Difference]: Without dead ends: 2835 [2022-07-20 22:26:33,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 22:26:33,234 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 610 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:33,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2300 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:26:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-20 22:26:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1230. [2022-07-20 22:26:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1138 states have (on average 1.2319859402460458) internal successors, (1402), 1146 states have internal predecessors, (1402), 81 states have call successors, (81), 6 states have call predecessors, (81), 10 states have return successors, (97), 82 states have call predecessors, (97), 77 states have call successors, (97) [2022-07-20 22:26:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1580 transitions. [2022-07-20 22:26:33,313 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1580 transitions. Word has length 65 [2022-07-20 22:26:33,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:33,313 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1580 transitions. [2022-07-20 22:26:33,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1580 transitions. [2022-07-20 22:26:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:33,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:33,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:33,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:33,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-20 22:26:33,531 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -520443000, now seen corresponding path program 1 times [2022-07-20 22:26:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122217195] [2022-07-20 22:26:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122217195] [2022-07-20 22:26:33,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122217195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629934216] [2022-07-20 22:26:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:33,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:33,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 22:26:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:26:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:33,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:33,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629934216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:33,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:33,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-20 22:26:33,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374400915] [2022-07-20 22:26:33,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:33,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:26:33,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:26:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:26:33,808 INFO L87 Difference]: Start difference. First operand 1230 states and 1580 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:34,429 INFO L93 Difference]: Finished difference Result 3599 states and 4859 transitions. [2022-07-20 22:26:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 22:26:34,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:34,437 INFO L225 Difference]: With dead ends: 3599 [2022-07-20 22:26:34,438 INFO L226 Difference]: Without dead ends: 3274 [2022-07-20 22:26:34,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-20 22:26:34,444 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 491 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:34,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2439 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 22:26:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-07-20 22:26:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1356. [2022-07-20 22:26:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1264 states have (on average 1.2231012658227849) internal successors, (1546), 1272 states have internal predecessors, (1546), 81 states have call successors, (81), 6 states have call predecessors, (81), 10 states have return successors, (97), 82 states have call predecessors, (97), 77 states have call successors, (97) [2022-07-20 22:26:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1724 transitions. [2022-07-20 22:26:34,538 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1724 transitions. Word has length 65 [2022-07-20 22:26:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:34,538 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1724 transitions. [2022-07-20 22:26:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1724 transitions. [2022-07-20 22:26:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:34,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:34,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:34,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:34,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 22:26:34,765 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash -915317052, now seen corresponding path program 1 times [2022-07-20 22:26:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:34,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407314375] [2022-07-20 22:26:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:34,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:34,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407314375] [2022-07-20 22:26:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407314375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226518273] [2022-07-20 22:26:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:34,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:34,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:34,840 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 22:26:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:26:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:35,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:26:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226518273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:35,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:26:35,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-20 22:26:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081445784] [2022-07-20 22:26:35,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 22:26:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 22:26:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:35,190 INFO L87 Difference]: Start difference. First operand 1356 states and 1724 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:36,452 INFO L93 Difference]: Finished difference Result 4186 states and 5617 transitions. [2022-07-20 22:26:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 22:26:36,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-20 22:26:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:36,460 INFO L225 Difference]: With dead ends: 4186 [2022-07-20 22:26:36,461 INFO L226 Difference]: Without dead ends: 3598 [2022-07-20 22:26:36,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 22:26:36,464 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 948 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:36,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 2562 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:26:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-20 22:26:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 1272. [2022-07-20 22:26:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1181 states have (on average 1.2277730736663843) internal successors, (1450), 1192 states have internal predecessors, (1450), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 78 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-20 22:26:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1621 transitions. [2022-07-20 22:26:36,552 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1621 transitions. Word has length 65 [2022-07-20 22:26:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:36,553 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1621 transitions. [2022-07-20 22:26:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 22:26:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1621 transitions. [2022-07-20 22:26:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:36,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:36,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:36,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:36,779 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,SelfDestructingSolverStorable32 [2022-07-20 22:26:36,779 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1548806121, now seen corresponding path program 1 times [2022-07-20 22:26:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656547769] [2022-07-20 22:26:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 22:26:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 22:26:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656547769] [2022-07-20 22:26:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656547769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339389944] [2022-07-20 22:26:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:36,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:36,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:36,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:36,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 22:26:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:26:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:36,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:36,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339389944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:36,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:36,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-20 22:26:36,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069360319] [2022-07-20 22:26:36,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:36,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:36,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:36,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:36,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:36,948 INFO L87 Difference]: Start difference. First operand 1272 states and 1621 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:37,103 INFO L93 Difference]: Finished difference Result 2435 states and 3135 transitions. [2022-07-20 22:26:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-20 22:26:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:37,107 INFO L225 Difference]: With dead ends: 2435 [2022-07-20 22:26:37,107 INFO L226 Difference]: Without dead ends: 1306 [2022-07-20 22:26:37,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:37,110 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 27 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 385 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 [2022-07-20 22:26:37,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 385 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-07-20 22:26:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1281. [2022-07-20 22:26:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1190 states have (on average 1.2285714285714286) internal successors, (1462), 1201 states have internal predecessors, (1462), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 78 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-20 22:26:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1633 transitions. [2022-07-20 22:26:37,181 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1633 transitions. Word has length 65 [2022-07-20 22:26:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:37,181 INFO L495 AbstractCegarLoop]: Abstraction has 1281 states and 1633 transitions. [2022-07-20 22:26:37,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1633 transitions. [2022-07-20 22:26:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:37,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:37,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:37,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:37,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:37,403 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -267248656, now seen corresponding path program 2 times [2022-07-20 22:26:37,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305955723] [2022-07-20 22:26:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305955723] [2022-07-20 22:26:37,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305955723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:37,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:37,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 22:26:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118974254] [2022-07-20 22:26:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:26:37,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:26:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:26:37,471 INFO L87 Difference]: Start difference. First operand 1281 states and 1633 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:37,821 INFO L93 Difference]: Finished difference Result 2456 states and 3239 transitions. [2022-07-20 22:26:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:26:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-20 22:26:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:37,825 INFO L225 Difference]: With dead ends: 2456 [2022-07-20 22:26:37,826 INFO L226 Difference]: Without dead ends: 2247 [2022-07-20 22:26:37,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:26:37,827 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 319 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:37,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1798 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-07-20 22:26:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1434. [2022-07-20 22:26:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1343 states have (on average 1.2204020848845867) internal successors, (1639), 1351 states have internal predecessors, (1639), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 81 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-20 22:26:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1810 transitions. [2022-07-20 22:26:37,910 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1810 transitions. Word has length 65 [2022-07-20 22:26:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:37,911 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1810 transitions. [2022-07-20 22:26:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1810 transitions. [2022-07-20 22:26:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:26:37,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:37,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:37,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:26:37,914 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash -662122708, now seen corresponding path program 1 times [2022-07-20 22:26:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896964201] [2022-07-20 22:26:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 22:26:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:37,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896964201] [2022-07-20 22:26:37,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896964201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:37,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:37,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:26:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641595120] [2022-07-20 22:26:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:37,982 INFO L87 Difference]: Start difference. First operand 1434 states and 1810 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:38,354 INFO L93 Difference]: Finished difference Result 2768 states and 3629 transitions. [2022-07-20 22:26:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 22:26:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-20 22:26:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:38,359 INFO L225 Difference]: With dead ends: 2768 [2022-07-20 22:26:38,359 INFO L226 Difference]: Without dead ends: 2306 [2022-07-20 22:26:38,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:26:38,361 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 312 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:38,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 942 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:26:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-07-20 22:26:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1432. [2022-07-20 22:26:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1341 states have (on average 1.2192393736017897) internal successors, (1635), 1347 states have internal predecessors, (1635), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (90), 83 states have call predecessors, (90), 76 states have call successors, (90) [2022-07-20 22:26:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1805 transitions. [2022-07-20 22:26:38,442 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1805 transitions. Word has length 65 [2022-07-20 22:26:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:38,442 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 1805 transitions. [2022-07-20 22:26:38,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1805 transitions. [2022-07-20 22:26:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:26:38,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:38,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:26:38,446 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -560142362, now seen corresponding path program 1 times [2022-07-20 22:26:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376781629] [2022-07-20 22:26:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:26:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:26:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-20 22:26:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 22:26:38,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:26:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376781629] [2022-07-20 22:26:38,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376781629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505924103] [2022-07-20 22:26:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:38,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:26:38,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:38,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:26:38,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 22:26:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:38,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:38,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505924103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:38,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:38,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-20 22:26:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925060073] [2022-07-20 22:26:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:26:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:38,550 INFO L87 Difference]: Start difference. First operand 1432 states and 1805 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:38,637 INFO L93 Difference]: Finished difference Result 2428 states and 3070 transitions. [2022-07-20 22:26:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-07-20 22:26:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:38,640 INFO L225 Difference]: With dead ends: 2428 [2022-07-20 22:26:38,640 INFO L226 Difference]: Without dead ends: 1443 [2022-07-20 22:26:38,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:38,642 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 14 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:38,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 410 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-07-20 22:26:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2022-07-20 22:26:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1342 states have (on average 1.2198211624441133) internal successors, (1637), 1348 states have internal predecessors, (1637), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (90), 83 states have call predecessors, (90), 76 states have call successors, (90) [2022-07-20 22:26:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1807 transitions. [2022-07-20 22:26:38,718 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1807 transitions. Word has length 66 [2022-07-20 22:26:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:38,719 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1807 transitions. [2022-07-20 22:26:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1807 transitions. [2022-07-20 22:26:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 22:26:38,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:38,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:38,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 22:26:38,944 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1378433375, now seen corresponding path program 1 times [2022-07-20 22:26:38,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:26:38,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334931227] [2022-07-20 22:26:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:38,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:26:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:38,968 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:26:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:39,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 22:26:39,048 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:26:39,050 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:26:39,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:26:39,055 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, 1] [2022-07-20 22:26:39,058 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 22:26:39,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:26:39 BoogieIcfgContainer [2022-07-20 22:26:39,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 22:26:39,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 22:26:39,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 22:26:39,146 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 22:26:39,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:16" (3/4) ... [2022-07-20 22:26:39,150 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-20 22:26:39,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 22:26:39,153 INFO L158 Benchmark]: Toolchain (without parser) took 24254.83ms. Allocated memory was 98.6MB in the beginning and 302.0MB in the end (delta: 203.4MB). Free memory was 71.0MB in the beginning and 153.4MB in the end (delta: -82.5MB). Peak memory consumption was 120.4MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,156 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 81.8MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:39,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.82ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 68.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,157 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.83ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 66.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,158 INFO L158 Benchmark]: Boogie Preprocessor took 30.12ms. Allocated memory is still 98.6MB. Free memory was 66.7MB in the beginning and 64.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,159 INFO L158 Benchmark]: RCFGBuilder took 657.34ms. Allocated memory is still 98.6MB. Free memory was 64.8MB in the beginning and 45.2MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,159 INFO L158 Benchmark]: TraceAbstraction took 23056.87ms. Allocated memory was 98.6MB in the beginning and 302.0MB in the end (delta: 203.4MB). Free memory was 44.7MB in the beginning and 154.5MB in the end (delta: -109.8MB). Peak memory consumption was 94.7MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,159 INFO L158 Benchmark]: Witness Printer took 20.58ms. Allocated memory is still 302.0MB. Free memory was 154.5MB in the beginning and 153.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:26:39,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 81.8MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.82ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 68.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.83ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 66.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.12ms. Allocated memory is still 98.6MB. Free memory was 66.7MB in the beginning and 64.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 657.34ms. Allocated memory is still 98.6MB. Free memory was 64.8MB in the beginning and 45.2MB in the end (delta: 19.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 23056.87ms. Allocated memory was 98.6MB in the beginning and 302.0MB in the end (delta: 203.4MB). Free memory was 44.7MB in the beginning and 154.5MB in the end (delta: -109.8MB). Peak memory consumption was 94.7MB. Max. memory is 16.1GB. * Witness Printer took 20.58ms. Allocated memory is still 302.0MB. Free memory was 154.5MB in the beginning and 153.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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: 17]: 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 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=-125, eb=127] [L251] 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))=144115188075855873, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L80] return (__retres4); VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, \result=0, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L251] 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)=144115188075855873] [L251] zero = base2flt(0, 0) [L252] 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))=144115188075855873, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L29] COND FALSE !(! m) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L35] 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))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L57] COND TRUE 1 VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L59] 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))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L76] 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))=144115188075855873, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L77] 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))=144115188075855873, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L78] __retres4 = res VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L80] return (__retres4); VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, \result=144115188075855871, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L252] 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] [L252] a = base2flt(ma, ea) [L253] 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] [L25] unsigned int res ; [L26] 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] [L29] 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] [L35] 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] [L57] 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] [L59] 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] [L64] COND TRUE e >= 127 [L65] __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] [L80] 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] [L253] 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] [L253] b = base2flt(mb, eb) [L255] 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] [L258] COND TRUE a > zero [L259] 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] [L263] 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] [L265] 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] [L268] COND TRUE b > zero [L269] 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] [L273] 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] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] 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] [L94] 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] [L101] 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] [L108] 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] [L109] 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] [L110] 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] [L111] 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] [L112] 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] [L113] 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=2, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L114] 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] [L16] 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] [L17] 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: 22.9s, OverallIterations: 38, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8057 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7863 mSDsluCounter, 42220 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 35138 mSDsCounter, 955 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9268 IncrementalHoareTripleChecker+Invalid, 10223 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 955 mSolverCounterUnsat, 7082 mSDtfsCounter, 9268 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2105 GetRequests, 1621 SyntacticMatches, 15 SemanticMatches, 469 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1434occurred in iteration=35, InterpolantAutomatonStates: 362, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 37 MinimizatonAttempts, 12764 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2922 NumberOfCodeBlocks, 2922 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 3364 ConstructedInterpolants, 0 QuantifiedInterpolants, 9323 SizeOfPredicates, 88 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 62 InterpolantComputations, 29 PerfectInterpolantSequences, 916/1054 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-20 22:26:39,183 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_1-3a.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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:26:41,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:26:41,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:26:41,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:26:41,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:26:41,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:26:41,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:26:41,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:26:41,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:26:41,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:26:41,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:26:41,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:26:41,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:26:41,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:26:41,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:26:41,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:26:41,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:26:41,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:26:41,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:26:41,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:26:41,269 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:26:41,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:26:41,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:26:41,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:26:41,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:26:41,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:26:41,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:26:41,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:26:41,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:26:41,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:26:41,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:26:41,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:26:41,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:26:41,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:26:41,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:26:41,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:26:41,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:26:41,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:26:41,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:26:41,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:26:41,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:26:41,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:26:41,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-20 22:26:41,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:26:41,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:26:41,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:26:41,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:26:41,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:26:41,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:26:41,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:26:41,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:26:41,335 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:26:41,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:26:41,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:26:41,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:26:41,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:26:41,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:26:41,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:26:41,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:26:41,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:26:41,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:26:41,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:26:41,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:26:41,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:26:41,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:41,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:26:41,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:26:41,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:26:41,340 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 22:26:41,340 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 22:26:41,341 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:26:41,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:26:41,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:26:41,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 22:26:41,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-07-20 22:26:41,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:26:41,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:26:41,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:26:41,692 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:26:41,692 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:26:41,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-20 22:26:41,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16f0f9af/f41fe5ff7a474431a8aa06474a164714/FLAG35baeeede [2022-07-20 22:26:42,231 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:26:42,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-20 22:26:42,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16f0f9af/f41fe5ff7a474431a8aa06474a164714/FLAG35baeeede [2022-07-20 22:26:42,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16f0f9af/f41fe5ff7a474431a8aa06474a164714 [2022-07-20 22:26:42,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:26:42,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:26:42,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:42,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:26:42,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:26:42,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:42" (1/1) ... [2022-07-20 22:26:42,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27fef64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:42, skipping insertion in model container [2022-07-20 22:26:42,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:26:42" (1/1) ... [2022-07-20 22:26:42,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:26:42,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:26:42,903 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_1-3a.c.cil.c[730,743] [2022-07-20 22:26:42,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:42,963 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:26:42,973 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_1-3a.c.cil.c[730,743] [2022-07-20 22:26:43,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:26:43,039 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:26:43,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43 WrapperNode [2022-07-20 22:26:43,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:26:43,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:43,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:26:43,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:26:43,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,072 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 145 [2022-07-20 22:26:43,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:26:43,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:26:43,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:26:43,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:26:43,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:26:43,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:26:43,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:26:43,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:26:43,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (1/1) ... [2022-07-20 22:26:43,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:26:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:26:43,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:26:43,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:26:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:26:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 22:26:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-20 22:26:43,172 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-20 22:26:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:26:43,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:26:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 22:26:43,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 22:26:43,232 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:26:43,233 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:26:43,558 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:26:43,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:26:43,565 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 22:26:43,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:43 BoogieIcfgContainer [2022-07-20 22:26:43,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:26:43,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:26:43,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:26:43,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:26:43,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:26:42" (1/3) ... [2022-07-20 22:26:43,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1858bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:43, skipping insertion in model container [2022-07-20 22:26:43,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:26:43" (2/3) ... [2022-07-20 22:26:43,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1858bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:26:43, skipping insertion in model container [2022-07-20 22:26:43,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:43" (3/3) ... [2022-07-20 22:26:43,574 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-07-20 22:26:43,587 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:26:43,599 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:26:43,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:26:43,678 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@7bc1a981, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@36a48017 [2022-07-20 22:26:43,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:26:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 22:26:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:26:43,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:43,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:43,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2022-07-20 22:26:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:43,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458994075] [2022-07-20 22:26:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:43,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:43,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:43,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 22:26:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:44,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458994075] [2022-07-20 22:26:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458994075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:44,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:44,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-20 22:26:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664163910] [2022-07-20 22:26:44,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:44,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:44,076 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:44,222 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2022-07-20 22:26:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-07-20 22:26:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:44,243 INFO L225 Difference]: With dead ends: 194 [2022-07-20 22:26:44,243 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 22:26:44,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:44,253 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 61 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 738 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 [2022-07-20 22:26:44,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 738 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 22:26:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2022-07-20 22:26:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 67 states have internal predecessors, (95), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-20 22:26:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 121 transitions. [2022-07-20 22:26:44,319 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 121 transitions. Word has length 32 [2022-07-20 22:26:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:44,320 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 121 transitions. [2022-07-20 22:26:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 121 transitions. [2022-07-20 22:26:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:26:44,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:44,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:44,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:44,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:44,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash 861184615, now seen corresponding path program 1 times [2022-07-20 22:26:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:44,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027075074] [2022-07-20 22:26:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:44,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:44,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:44,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 22:26:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:26:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:44,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:44,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027075074] [2022-07-20 22:26:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027075074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:44,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:44,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582567028] [2022-07-20 22:26:44,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:44,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:44,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:44,679 INFO L87 Difference]: Start difference. First operand 80 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:44,770 INFO L93 Difference]: Finished difference Result 169 states and 260 transitions. [2022-07-20 22:26:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-20 22:26:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:44,776 INFO L225 Difference]: With dead ends: 169 [2022-07-20 22:26:44,777 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 22:26:44,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:44,780 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 52 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:44,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 457 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 22:26:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-07-20 22:26:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.4660194174757282) internal successors, (151), 104 states have internal predecessors, (151), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (20), 18 states have call predecessors, (20), 15 states have call successors, (20) [2022-07-20 22:26:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 187 transitions. [2022-07-20 22:26:44,809 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 187 transitions. Word has length 36 [2022-07-20 22:26:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:44,810 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 187 transitions. [2022-07-20 22:26:44,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 187 transitions. [2022-07-20 22:26:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:26:44,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:44,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:44,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-20 22:26:45,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:45,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1541242985, now seen corresponding path program 1 times [2022-07-20 22:26:45,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:45,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780026911] [2022-07-20 22:26:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:45,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:45,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 22:26:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 22:26:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:45,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:45,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:45,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780026911] [2022-07-20 22:26:45,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780026911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:45,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:45,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:26:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71673295] [2022-07-20 22:26:45,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:26:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:26:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:45,108 INFO L87 Difference]: Start difference. First operand 123 states and 187 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:45,226 INFO L93 Difference]: Finished difference Result 180 states and 274 transitions. [2022-07-20 22:26:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-20 22:26:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:45,228 INFO L225 Difference]: With dead ends: 180 [2022-07-20 22:26:45,229 INFO L226 Difference]: Without dead ends: 141 [2022-07-20 22:26:45,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:45,230 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:45,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-20 22:26:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2022-07-20 22:26:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.443298969072165) internal successors, (140), 98 states have internal predecessors, (140), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-20 22:26:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2022-07-20 22:26:45,249 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 36 [2022-07-20 22:26:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:45,249 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2022-07-20 22:26:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2022-07-20 22:26:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:26:45,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:45,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:45,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:45,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1860643154, now seen corresponding path program 1 times [2022-07-20 22:26:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:45,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538079053] [2022-07-20 22:26:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:45,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:45,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:45,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:45,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 22:26:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:26:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:45,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538079053] [2022-07-20 22:26:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538079053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:45,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:45,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 22:26:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982708194] [2022-07-20 22:26:45,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:26:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:26:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:45,624 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:45,784 INFO L93 Difference]: Finished difference Result 312 states and 476 transitions. [2022-07-20 22:26:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:26:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-07-20 22:26:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:45,787 INFO L225 Difference]: With dead ends: 312 [2022-07-20 22:26:45,787 INFO L226 Difference]: Without dead ends: 237 [2022-07-20 22:26:45,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:26:45,789 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:45,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 645 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-20 22:26:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2022-07-20 22:26:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.3870967741935485) internal successors, (215), 154 states have internal predecessors, (215), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2022-07-20 22:26:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 259 transitions. [2022-07-20 22:26:45,817 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 259 transitions. Word has length 40 [2022-07-20 22:26:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:45,819 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 259 transitions. [2022-07-20 22:26:45,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 259 transitions. [2022-07-20 22:26:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:45,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:45,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:45,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:46,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:46,033 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2022-07-20 22:26:46,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:46,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678374098] [2022-07-20 22:26:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:46,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:46,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 22:26:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:46,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:46,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678374098] [2022-07-20 22:26:46,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678374098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:46,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:46,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737217889] [2022-07-20 22:26:46,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:46,124 INFO L87 Difference]: Start difference. First operand 178 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:46,172 INFO L93 Difference]: Finished difference Result 331 states and 489 transitions. [2022-07-20 22:26:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-20 22:26:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:46,175 INFO L225 Difference]: With dead ends: 331 [2022-07-20 22:26:46,175 INFO L226 Difference]: Without dead ends: 265 [2022-07-20 22:26:46,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:46,176 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 66 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:46,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 344 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:46,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-20 22:26:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-07-20 22:26:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 207 states have (on average 1.3478260869565217) internal successors, (279), 206 states have internal predecessors, (279), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2022-07-20 22:26:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 329 transitions. [2022-07-20 22:26:46,199 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 329 transitions. Word has length 43 [2022-07-20 22:26:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:46,199 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 329 transitions. [2022-07-20 22:26:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 329 transitions. [2022-07-20 22:26:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:26:46,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:46,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:46,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:46,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1682069059, now seen corresponding path program 1 times [2022-07-20 22:26:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:46,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891185498] [2022-07-20 22:26:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:46,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:46,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:46,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 22:26:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:26:46,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:46,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:46,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891185498] [2022-07-20 22:26:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891185498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:46,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:46,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706987483] [2022-07-20 22:26:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:46,485 INFO L87 Difference]: Start difference. First operand 233 states and 329 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:46,543 INFO L93 Difference]: Finished difference Result 408 states and 573 transitions. [2022-07-20 22:26:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-20 22:26:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:46,546 INFO L225 Difference]: With dead ends: 408 [2022-07-20 22:26:46,552 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 22:26:46,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:46,556 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:46,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 22:26:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-07-20 22:26:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 146 states have (on average 1.3082191780821917) internal successors, (191), 148 states have internal predecessors, (191), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-20 22:26:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2022-07-20 22:26:46,563 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 43 [2022-07-20 22:26:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:46,563 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2022-07-20 22:26:46,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:26:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2022-07-20 22:26:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:46,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:46,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:46,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-20 22:26:46,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -690232792, now seen corresponding path program 1 times [2022-07-20 22:26:46,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:46,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943373205] [2022-07-20 22:26:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:46,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:46,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:46,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:46,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 22:26:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 22:26:46,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:47,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:47,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943373205] [2022-07-20 22:26:47,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943373205] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:47,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:47,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-20 22:26:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702610808] [2022-07-20 22:26:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:26:47,051 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:47,389 INFO L93 Difference]: Finished difference Result 316 states and 459 transitions. [2022-07-20 22:26:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:26:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:47,392 INFO L225 Difference]: With dead ends: 316 [2022-07-20 22:26:47,392 INFO L226 Difference]: Without dead ends: 280 [2022-07-20 22:26:47,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:47,393 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 193 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:47,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 502 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 22:26:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-20 22:26:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2022-07-20 22:26:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.303370786516854) internal successors, (232), 181 states have internal predecessors, (232), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-20 22:26:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 279 transitions. [2022-07-20 22:26:47,404 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 279 transitions. Word has length 44 [2022-07-20 22:26:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:47,404 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 279 transitions. [2022-07-20 22:26:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 279 transitions. [2022-07-20 22:26:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:47,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:47,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:47,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:47,615 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2022-07-20 22:26:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288819926] [2022-07-20 22:26:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:47,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:47,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 22:26:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:47,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:26:47,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:47,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:47,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288819926] [2022-07-20 22:26:47,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288819926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:47,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:47,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738016079] [2022-07-20 22:26:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:47,680 INFO L87 Difference]: Start difference. First operand 204 states and 279 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:47,718 INFO L93 Difference]: Finished difference Result 211 states and 285 transitions. [2022-07-20 22:26:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:47,722 INFO L225 Difference]: With dead ends: 211 [2022-07-20 22:26:47,722 INFO L226 Difference]: Without dead ends: 204 [2022-07-20 22:26:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:47,723 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:47,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 380 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-20 22:26:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-20 22:26:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.2865168539325842) internal successors, (229), 181 states have internal predecessors, (229), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-20 22:26:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 276 transitions. [2022-07-20 22:26:47,733 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 276 transitions. Word has length 44 [2022-07-20 22:26:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:47,734 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 276 transitions. [2022-07-20 22:26:47,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 276 transitions. [2022-07-20 22:26:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:47,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:47,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:47,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:47,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1077808761, now seen corresponding path program 2 times [2022-07-20 22:26:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605995930] [2022-07-20 22:26:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:26:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:47,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:47,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 22:26:47,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 22:26:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:26:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:26:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:48,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:48,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605995930] [2022-07-20 22:26:48,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605995930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:48,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:26:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618672628] [2022-07-20 22:26:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:48,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:26:48,094 INFO L87 Difference]: Start difference. First operand 204 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:48,174 INFO L93 Difference]: Finished difference Result 247 states and 337 transitions. [2022-07-20 22:26:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:48,176 INFO L225 Difference]: With dead ends: 247 [2022-07-20 22:26:48,176 INFO L226 Difference]: Without dead ends: 245 [2022-07-20 22:26:48,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:26:48,177 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:48,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 597 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-20 22:26:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-20 22:26:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 208. [2022-07-20 22:26:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.281767955801105) internal successors, (232), 184 states have internal predecessors, (232), 21 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-20 22:26:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 279 transitions. [2022-07-20 22:26:48,189 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 279 transitions. Word has length 44 [2022-07-20 22:26:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:48,189 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 279 transitions. [2022-07-20 22:26:48,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 279 transitions. [2022-07-20 22:26:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:26:48,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:48,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:48,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:48,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:48,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:48,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1020550459, now seen corresponding path program 1 times [2022-07-20 22:26:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:48,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407803600] [2022-07-20 22:26:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:48,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:48,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 22:26:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:26:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:48,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:48,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407803600] [2022-07-20 22:26:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407803600] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:26:48,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:26:48,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-20 22:26:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663877801] [2022-07-20 22:26:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:26:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:26:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:26:48,719 INFO L87 Difference]: Start difference. First operand 208 states and 279 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:48,859 INFO L93 Difference]: Finished difference Result 265 states and 359 transitions. [2022-07-20 22:26:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:26:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-20 22:26:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:48,862 INFO L225 Difference]: With dead ends: 265 [2022-07-20 22:26:48,862 INFO L226 Difference]: Without dead ends: 263 [2022-07-20 22:26:48,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-20 22:26:48,863 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 84 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 508 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 [2022-07-20 22:26:48,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 508 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-20 22:26:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 212. [2022-07-20 22:26:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 184 states have (on average 1.2771739130434783) internal successors, (235), 187 states have internal predecessors, (235), 21 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-20 22:26:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 282 transitions. [2022-07-20 22:26:48,879 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 282 transitions. Word has length 44 [2022-07-20 22:26:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:48,879 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 282 transitions. [2022-07-20 22:26:48,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 282 transitions. [2022-07-20 22:26:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:26:48,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:48,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:48,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2022-07-20 22:26:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804870529] [2022-07-20 22:26:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:49,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:49,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 22:26:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:49,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:49,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:49,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804870529] [2022-07-20 22:26:49,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804870529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:49,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:49,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010518492] [2022-07-20 22:26:49,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:49,163 INFO L87 Difference]: Start difference. First operand 212 states and 282 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:49,199 INFO L93 Difference]: Finished difference Result 351 states and 481 transitions. [2022-07-20 22:26:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:26:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 22:26:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:49,201 INFO L225 Difference]: With dead ends: 351 [2022-07-20 22:26:49,201 INFO L226 Difference]: Without dead ends: 299 [2022-07-20 22:26:49,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:49,202 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 75 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:49,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 309 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-20 22:26:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2022-07-20 22:26:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 200 states have (on average 1.285) internal successors, (257), 202 states have internal predecessors, (257), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2022-07-20 22:26:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 310 transitions. [2022-07-20 22:26:49,230 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 310 transitions. Word has length 45 [2022-07-20 22:26:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 310 transitions. [2022-07-20 22:26:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 310 transitions. [2022-07-20 22:26:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:26:49,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:49,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:49,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:49,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2022-07-20 22:26:49,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:49,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8297170] [2022-07-20 22:26:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:49,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:49,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:49,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 22:26:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:26:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:49,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:49,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:49,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8297170] [2022-07-20 22:26:49,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8297170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:49,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:49,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:26:49,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290310637] [2022-07-20 22:26:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:26:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:26:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:26:49,504 INFO L87 Difference]: Start difference. First operand 231 states and 310 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:49,527 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2022-07-20 22:26:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:26:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-20 22:26:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:49,529 INFO L225 Difference]: With dead ends: 246 [2022-07-20 22:26:49,529 INFO L226 Difference]: Without dead ends: 207 [2022-07-20 22:26:49,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:49,530 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:49,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-20 22:26:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-07-20 22:26:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 176 states have (on average 1.3011363636363635) internal successors, (229), 179 states have internal predecessors, (229), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2022-07-20 22:26:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 280 transitions. [2022-07-20 22:26:49,547 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 280 transitions. Word has length 48 [2022-07-20 22:26:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:49,547 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 280 transitions. [2022-07-20 22:26:49,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 280 transitions. [2022-07-20 22:26:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:49,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:49,549 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] [2022-07-20 22:26:49,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:49,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,758 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1948634931, now seen corresponding path program 1 times [2022-07-20 22:26:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:49,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369307170] [2022-07-20 22:26:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:49,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:49,761 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:49,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 22:26:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:26:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:26:49,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:26:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:26:49,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369307170] [2022-07-20 22:26:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369307170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:26:49,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:26:49,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-20 22:26:49,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279219291] [2022-07-20 22:26:49,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:26:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:26:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:26:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:26:49,958 INFO L87 Difference]: Start difference. First operand 207 states and 280 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:50,105 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2022-07-20 22:26:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:26:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-07-20 22:26:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:50,107 INFO L225 Difference]: With dead ends: 298 [2022-07-20 22:26:50,107 INFO L226 Difference]: Without dead ends: 232 [2022-07-20 22:26:50,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:26:50,108 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 174 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:50,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 634 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:26:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-20 22:26:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 166. [2022-07-20 22:26:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 143 states have internal predecessors, (184), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-07-20 22:26:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2022-07-20 22:26:50,120 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 50 [2022-07-20 22:26:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:50,120 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2022-07-20 22:26:50,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 22:26:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2022-07-20 22:26:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 22:26:50,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:50,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:50,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:50,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:50,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1060673824, now seen corresponding path program 1 times [2022-07-20 22:26:50,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799519911] [2022-07-20 22:26:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:50,333 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 22:26:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:26:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:26:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:26:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:26:50,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:26:50,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:26:50,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799519911] [2022-07-20 22:26:50,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799519911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:26:50,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:26:50,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:26:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411039756] [2022-07-20 22:26:50,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:26:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:26:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:26:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:26:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:26:50,399 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:26:50,481 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2022-07-20 22:26:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:26:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-20 22:26:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:26:50,483 INFO L225 Difference]: With dead ends: 241 [2022-07-20 22:26:50,483 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 22:26:50,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:26:50,484 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 128 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:26:50,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 345 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:26:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 22:26:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-07-20 22:26:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3) internal successors, (182), 143 states have internal predecessors, (182), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-07-20 22:26:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 223 transitions. [2022-07-20 22:26:50,511 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 223 transitions. Word has length 49 [2022-07-20 22:26:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:26:50,512 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 223 transitions. [2022-07-20 22:26:50,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 22:26:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 223 transitions. [2022-07-20 22:26:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 22:26:50,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:26:50,513 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] [2022-07-20 22:26:50,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:50,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:26:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:26:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2022-07-20 22:26:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:26:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241420713] [2022-07-20 22:26:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:26:50,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:26:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:26:50,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:26:50,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 22:26:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:50,770 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:26:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:26:50,829 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-20 22:26:50,829 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:26:50,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:26:50,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 22:26:51,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:26:51,035 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:26:51,037 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 22:26:51,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:26:51 BoogieIcfgContainer [2022-07-20 22:26:51,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 22:26:51,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 22:26:51,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 22:26:51,072 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 22:26:51,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:26:43" (3/4) ... [2022-07-20 22:26:51,074 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-20 22:26:51,128 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-20 22:26:51,128 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 22:26:51,129 INFO L158 Benchmark]: Toolchain (without parser) took 8366.43ms. Allocated memory was 56.6MB in the beginning and 100.7MB in the end (delta: 44.0MB). Free memory was 34.8MB in the beginning and 62.9MB in the end (delta: -28.1MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,129 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 38.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:51,130 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.86ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 38.8MB in the end (delta: -4.1MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,130 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.22ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 36.8MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,130 INFO L158 Benchmark]: Boogie Preprocessor took 26.26ms. Allocated memory is still 56.6MB. Free memory was 36.8MB in the beginning and 35.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:26:51,130 INFO L158 Benchmark]: RCFGBuilder took 466.34ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 48.1MB in the end (delta: -13.0MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,131 INFO L158 Benchmark]: TraceAbstraction took 7503.12ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 47.7MB in the beginning and 67.1MB in the end (delta: -19.4MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,131 INFO L158 Benchmark]: Witness Printer took 56.86ms. Allocated memory is still 100.7MB. Free memory was 67.1MB in the beginning and 62.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-20 22:26:51,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 38.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.86ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 38.8MB in the end (delta: -4.1MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.22ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 36.8MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.26ms. Allocated memory is still 56.6MB. Free memory was 36.8MB in the beginning and 35.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 466.34ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 48.1MB in the end (delta: -13.0MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7503.12ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 47.7MB in the beginning and 67.1MB in the end (delta: -19.4MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * Witness Printer took 56.86ms. Allocated memory is still 100.7MB. Free memory was 67.1MB in the beginning and 62.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L253] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1236 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1204 mSDsluCounter, 6533 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 4976 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 858 IncrementalHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 1557 mSDtfsCounter, 858 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 818 GetRequests, 717 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=5, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 502 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 648 NumberOfCodeBlocks, 630 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 789 ConstructedInterpolants, 2 QuantifiedInterpolants, 1312 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1139 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 19 InterpolantComputations, 11 PerfectInterpolantSequences, 274/313 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 proved your program to be incorrect! [2022-07-20 22:26:51,169 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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE