./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 e8d55036 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-?-e8d5503-m [2023-02-15 19:21:46,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:21:46,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:21:46,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:21:46,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:21:46,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:21:46,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:21:46,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:21:46,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:21:46,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:21:46,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:21:46,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:21:46,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:21:46,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:21:46,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:21:46,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:21:46,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:21:46,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:21:46,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:21:46,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:21:46,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:21:46,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:21:46,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:21:46,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:21:46,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:21:46,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:21:46,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:21:46,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:21:46,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:21:46,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:21:46,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:21:46,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:21:46,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:21:46,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:21:46,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:21:46,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:21:46,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:21:46,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:21:46,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:21:46,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:21:46,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:21:46,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:21:46,253 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:21:46,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:21:46,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:21:46,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:21:46,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:21:46,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:21:46,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:21:46,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:21:46,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:21:46,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:21:46,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:21:46,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:21:46,257 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2023-02-15 19:21:46,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:21:46,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:21:46,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:21:46,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:21:46,474 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:21:46,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-15 19:21:47,538 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:21:47,749 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:21:47,751 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-15 19:21:47,757 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6b5728ee/dcce9544b00449f9aeff6f8d4d4947df/FLAGc44020056 [2023-02-15 19:21:47,770 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6b5728ee/dcce9544b00449f9aeff6f8d4d4947df [2023-02-15 19:21:47,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:21:47,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:21:47,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:21:47,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:21:47,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:21:47,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:21:47" (1/1) ... [2023-02-15 19:21:47,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166765de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:47, skipping insertion in model container [2023-02-15 19:21:47,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:21:47" (1/1) ... [2023-02-15 19:21:47,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:21:47,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:21:47,908 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-02-15 19:21:47,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:21:47,963 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:21:47,973 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-02-15 19:21:48,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:21:48,011 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:21:48,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48 WrapperNode [2023-02-15 19:21:48,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:21:48,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:21:48,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:21:48,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:21:48,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,039 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 201 [2023-02-15 19:21:48,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:21:48,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:21:48,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:21:48,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:21:48,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,064 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:21:48,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:21:48,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:21:48,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:21:48,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (1/1) ... [2023-02-15 19:21:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:21:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:48,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 19:21:48,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 19:21:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:21:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:21:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 19:21:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 19:21:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:21:48,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:21:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 19:21:48,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 19:21:48,171 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:21:48,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:21:48,526 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:21:48,531 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:21:48,531 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:21:48,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:21:48 BoogieIcfgContainer [2023-02-15 19:21:48,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:21:48,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:21:48,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:21:48,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:21:48,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:21:47" (1/3) ... [2023-02-15 19:21:48,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1e935d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:21:48, skipping insertion in model container [2023-02-15 19:21:48,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:48" (2/3) ... [2023-02-15 19:21:48,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1e935d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:21:48, skipping insertion in model container [2023-02-15 19:21:48,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:21:48" (3/3) ... [2023-02-15 19:21:48,539 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-02-15 19:21:48,551 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:21:48,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:21:48,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:21:48,589 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56a01c66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:21:48,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:21:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 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) [2023-02-15 19:21:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 19:21:48,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:48,600 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] [2023-02-15 19:21:48,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash 906811198, now seen corresponding path program 1 times [2023-02-15 19:21:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911161059] [2023-02-15 19:21:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:48,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:48,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:48,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:48,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911161059] [2023-02-15 19:21:48,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911161059] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:48,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:48,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:21:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513306067] [2023-02-15 19:21:48,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:21:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:21:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:48,870 INFO L87 Difference]: Start difference. First operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 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 3 states, 3 states have (on average 7.333333333333333) 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) [2023-02-15 19:21:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:48,922 INFO L93 Difference]: Finished difference Result 235 states and 390 transitions. [2023-02-15 19:21:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:21:48,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) 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 [2023-02-15 19:21:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:48,934 INFO L225 Difference]: With dead ends: 235 [2023-02-15 19:21:48,934 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 19:21:48,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:48,942 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:48,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 19:21:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-15 19:21:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 113 states have internal predecessors, (171), 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) [2023-02-15 19:21:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2023-02-15 19:21:48,980 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 37 [2023-02-15 19:21:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:48,983 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2023-02-15 19:21:48,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) 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) [2023-02-15 19:21:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2023-02-15 19:21:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 19:21:48,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:48,987 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] [2023-02-15 19:21:48,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:21:48,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 804838827, now seen corresponding path program 1 times [2023-02-15 19:21:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:48,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529934576] [2023-02-15 19:21:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529934576] [2023-02-15 19:21:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529934576] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:49,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:49,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:21:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012923951] [2023-02-15 19:21:49,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:21:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:21:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:49,053 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 8.0) 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) [2023-02-15 19:21:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:49,071 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2023-02-15 19:21:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:21:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) 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 [2023-02-15 19:21:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:49,073 INFO L225 Difference]: With dead ends: 228 [2023-02-15 19:21:49,077 INFO L226 Difference]: Without dead ends: 192 [2023-02-15 19:21:49,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:49,078 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:49,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-15 19:21:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2023-02-15 19:21:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 165 states have internal predecessors, (246), 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) [2023-02-15 19:21:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 280 transitions. [2023-02-15 19:21:49,106 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 280 transitions. Word has length 39 [2023-02-15 19:21:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:49,107 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 280 transitions. [2023-02-15 19:21:49,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) 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) [2023-02-15 19:21:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 280 transitions. [2023-02-15 19:21:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 19:21:49,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:49,108 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] [2023-02-15 19:21:49,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:21:49,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1821406099, now seen corresponding path program 1 times [2023-02-15 19:21:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974011685] [2023-02-15 19:21:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:49,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:49,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:49,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974011685] [2023-02-15 19:21:49,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974011685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:49,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845297804] [2023-02-15 19:21:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:49,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:49,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:49,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:49,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:21:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:21:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:21:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:49,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845297804] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:49,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:49,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2023-02-15 19:21:49,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167118803] [2023-02-15 19:21:49,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:49,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:21:49,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:21:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:21:49,446 INFO L87 Difference]: Start difference. First operand 183 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) 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) [2023-02-15 19:21:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:49,461 INFO L93 Difference]: Finished difference Result 319 states and 484 transitions. [2023-02-15 19:21:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:21:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) 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 [2023-02-15 19:21:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:49,463 INFO L225 Difference]: With dead ends: 319 [2023-02-15 19:21:49,463 INFO L226 Difference]: Without dead ends: 215 [2023-02-15 19:21:49,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:21:49,465 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 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 [2023-02-15 19:21:49,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-15 19:21:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2023-02-15 19:21:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 165 states have internal predecessors, (242), 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) [2023-02-15 19:21:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2023-02-15 19:21:49,477 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 40 [2023-02-15 19:21:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:49,477 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2023-02-15 19:21:49,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) 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) [2023-02-15 19:21:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2023-02-15 19:21:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 19:21:49,479 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:49,479 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] [2023-02-15 19:21:49,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:49,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:49,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash -363711082, now seen corresponding path program 1 times [2023-02-15 19:21:49,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:49,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809273035] [2023-02-15 19:21:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:49,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:49,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809273035] [2023-02-15 19:21:49,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809273035] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:49,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:49,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643796135] [2023-02-15 19:21:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:49,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:49,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:49,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:49,775 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 4 states, 4 states have (on average 6.25) 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) [2023-02-15 19:21:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:49,816 INFO L93 Difference]: Finished difference Result 291 states and 442 transitions. [2023-02-15 19:21:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) 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 [2023-02-15 19:21:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:49,819 INFO L225 Difference]: With dead ends: 291 [2023-02-15 19:21:49,819 INFO L226 Difference]: Without dead ends: 262 [2023-02-15 19:21:49,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:49,825 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:49,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 477 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-15 19:21:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2023-02-15 19:21:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.5) internal successors, (303), 206 states have internal predecessors, (303), 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) [2023-02-15 19:21:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 347 transitions. [2023-02-15 19:21:49,845 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 347 transitions. Word has length 40 [2023-02-15 19:21:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:49,846 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 347 transitions. [2023-02-15 19:21:49,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) 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) [2023-02-15 19:21:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 347 transitions. [2023-02-15 19:21:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 19:21:49,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:49,848 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] [2023-02-15 19:21:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:21:49,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1384779436, now seen corresponding path program 1 times [2023-02-15 19:21:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:49,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065632478] [2023-02-15 19:21:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:49,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065632478] [2023-02-15 19:21:49,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065632478] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:49,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:49,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:21:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164576972] [2023-02-15 19:21:49,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:21:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:21:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:49,889 INFO L87 Difference]: Start difference. First operand 228 states and 347 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) 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) [2023-02-15 19:21:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:49,898 INFO L93 Difference]: Finished difference Result 241 states and 363 transitions. [2023-02-15 19:21:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:21:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) 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 [2023-02-15 19:21:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:49,900 INFO L225 Difference]: With dead ends: 241 [2023-02-15 19:21:49,900 INFO L226 Difference]: Without dead ends: 234 [2023-02-15 19:21:49,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:49,901 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:49,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-15 19:21:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2023-02-15 19:21:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.4975369458128078) internal successors, (304), 207 states have internal predecessors, (304), 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) [2023-02-15 19:21:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2023-02-15 19:21:49,919 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 40 [2023-02-15 19:21:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:49,921 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2023-02-15 19:21:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) 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) [2023-02-15 19:21:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2023-02-15 19:21:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 19:21:49,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:49,926 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] [2023-02-15 19:21:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 19:21:49,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1398619051, now seen corresponding path program 1 times [2023-02-15 19:21:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:49,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106410370] [2023-02-15 19:21:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:50,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106410370] [2023-02-15 19:21:50,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106410370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241724018] [2023-02-15 19:21:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:50,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:50,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:50,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:21:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:21:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:50,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:50,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241724018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:50,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:50,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-15 19:21:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786530750] [2023-02-15 19:21:50,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 19:21:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 19:21:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:21:50,311 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 19:21:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:50,498 INFO L93 Difference]: Finished difference Result 762 states and 1158 transitions. [2023-02-15 19:21:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:21:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-02-15 19:21:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:50,502 INFO L225 Difference]: With dead ends: 762 [2023-02-15 19:21:50,502 INFO L226 Difference]: Without dead ends: 576 [2023-02-15 19:21:50,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-15 19:21:50,503 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 576 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:50,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1513 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-15 19:21:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2023-02-15 19:21:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 320 states have (on average 1.465625) internal successors, (469), 325 states have internal predecessors, (469), 35 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (37), 34 states have call predecessors, (37), 33 states have call successors, (37) [2023-02-15 19:21:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2023-02-15 19:21:50,515 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 41 [2023-02-15 19:21:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:50,516 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2023-02-15 19:21:50,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 19:21:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2023-02-15 19:21:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 19:21:50,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:50,517 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] [2023-02-15 19:21:50,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:50,722 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,SelfDestructingSolverStorable5 [2023-02-15 19:21:50,722 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1616484567, now seen corresponding path program 1 times [2023-02-15 19:21:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175146183] [2023-02-15 19:21:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:50,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175146183] [2023-02-15 19:21:50,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175146183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:50,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:50,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:21:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742037733] [2023-02-15 19:21:50,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:21:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:21:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:21:50,816 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2023-02-15 19:21:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:50,898 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2023-02-15 19:21:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:21:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 41 [2023-02-15 19:21:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:50,900 INFO L225 Difference]: With dead ends: 779 [2023-02-15 19:21:50,900 INFO L226 Difference]: Without dead ends: 473 [2023-02-15 19:21:50,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:21:50,901 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:50,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 735 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-15 19:21:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2023-02-15 19:21:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 424 states have (on average 1.4103773584905661) internal successors, (598), 430 states have internal predecessors, (598), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-15 19:21:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2023-02-15 19:21:50,915 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 41 [2023-02-15 19:21:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:50,915 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2023-02-15 19:21:50,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2023-02-15 19:21:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2023-02-15 19:21:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 19:21:50,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:50,916 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] [2023-02-15 19:21:50,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 19:21:50,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash 337909198, now seen corresponding path program 1 times [2023-02-15 19:21:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032787911] [2023-02-15 19:21:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:50,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:50,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032787911] [2023-02-15 19:21:50,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032787911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:50,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:50,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:21:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851377162] [2023-02-15 19:21:50,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:50,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:21:50,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:21:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:50,970 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-15 19:21:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,000 INFO L93 Difference]: Finished difference Result 476 states and 688 transitions. [2023-02-15 19:21:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:21:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 42 [2023-02-15 19:21:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,002 INFO L225 Difference]: With dead ends: 476 [2023-02-15 19:21:51,002 INFO L226 Difference]: Without dead ends: 469 [2023-02-15 19:21:51,002 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 [2023-02-15 19:21:51,003 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 528 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 [2023-02-15 19:21:51,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 528 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-15 19:21:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2023-02-15 19:21:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 422 states have (on average 1.40521327014218) internal successors, (593), 428 states have internal predecessors, (593), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-15 19:21:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 677 transitions. [2023-02-15 19:21:51,017 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 677 transitions. Word has length 42 [2023-02-15 19:21:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,018 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 677 transitions. [2023-02-15 19:21:51,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-15 19:21:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 677 transitions. [2023-02-15 19:21:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:21:51,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,019 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] [2023-02-15 19:21:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 19:21:51,019 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1951760518, now seen corresponding path program 1 times [2023-02-15 19:21:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842682635] [2023-02-15 19:21:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842682635] [2023-02-15 19:21:51,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842682635] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:51,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:51,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236530031] [2023-02-15 19:21:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:51,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:51,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:51,054 INFO L87 Difference]: Start difference. First operand 467 states and 677 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) [2023-02-15 19:21:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,079 INFO L93 Difference]: Finished difference Result 517 states and 742 transitions. [2023-02-15 19:21:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:51,080 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 [2023-02-15 19:21:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,082 INFO L225 Difference]: With dead ends: 517 [2023-02-15 19:21:51,082 INFO L226 Difference]: Without dead ends: 443 [2023-02-15 19:21:51,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:51,083 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:51,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 435 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-15 19:21:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2023-02-15 19:21:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 316 states have (on average 1.370253164556962) internal successors, (433), 318 states have internal predecessors, (433), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 28 states have call predecessors, (29), 25 states have call successors, (29) [2023-02-15 19:21:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 489 transitions. [2023-02-15 19:21:51,093 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 489 transitions. Word has length 43 [2023-02-15 19:21:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,093 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 489 transitions. [2023-02-15 19:21:51,094 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) [2023-02-15 19:21:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 489 transitions. [2023-02-15 19:21:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 19:21:51,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,094 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] [2023-02-15 19:21:51,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 19:21:51,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1645353096, now seen corresponding path program 1 times [2023-02-15 19:21:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049129730] [2023-02-15 19:21:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:51,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049129730] [2023-02-15 19:21:51,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049129730] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:51,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:51,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:21:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231150230] [2023-02-15 19:21:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:21:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:21:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:21:51,169 INFO L87 Difference]: Start difference. First operand 347 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-02-15 19:21:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,298 INFO L93 Difference]: Finished difference Result 876 states and 1271 transitions. [2023-02-15 19:21:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:21:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 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 [2023-02-15 19:21:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,300 INFO L225 Difference]: With dead ends: 876 [2023-02-15 19:21:51,301 INFO L226 Difference]: Without dead ends: 728 [2023-02-15 19:21:51,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:21:51,301 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 179 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:51,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-15 19:21:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2023-02-15 19:21:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 411 states have internal predecessors, (565), 27 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (33), 30 states have call predecessors, (33), 25 states have call successors, (33) [2023-02-15 19:21:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 625 transitions. [2023-02-15 19:21:51,316 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 625 transitions. Word has length 45 [2023-02-15 19:21:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,316 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 625 transitions. [2023-02-15 19:21:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-02-15 19:21:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 625 transitions. [2023-02-15 19:21:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 19:21:51,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,317 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] [2023-02-15 19:21:51,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 19:21:51,318 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash 836006470, now seen corresponding path program 1 times [2023-02-15 19:21:51,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195428846] [2023-02-15 19:21:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:51,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195428846] [2023-02-15 19:21:51,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195428846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973125179] [2023-02-15 19:21:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:51,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:51,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:21:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:21:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:21:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973125179] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:51,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:51,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2023-02-15 19:21:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418374736] [2023-02-15 19:21:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:51,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:21:51,570 INFO L87 Difference]: Start difference. First operand 442 states and 625 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) [2023-02-15 19:21:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,592 INFO L93 Difference]: Finished difference Result 646 states and 902 transitions. [2023-02-15 19:21:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:51,593 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 [2023-02-15 19:21:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,594 INFO L225 Difference]: With dead ends: 646 [2023-02-15 19:21:51,594 INFO L226 Difference]: Without dead ends: 414 [2023-02-15 19:21:51,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:21:51,595 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 98 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:51,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 318 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-02-15 19:21:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2023-02-15 19:21:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 326 states have (on average 1.3466257668711656) internal successors, (439), 328 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 19:21:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2023-02-15 19:21:51,607 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 45 [2023-02-15 19:21:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,608 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2023-02-15 19:21:51,608 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) [2023-02-15 19:21:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2023-02-15 19:21:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 19:21:51,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,609 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] [2023-02-15 19:21:51,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:51,813 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 [2023-02-15 19:21:51,814 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash 980602509, now seen corresponding path program 1 times [2023-02-15 19:21:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150681409] [2023-02-15 19:21:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:21:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:51,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150681409] [2023-02-15 19:21:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150681409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:51,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:51,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954992256] [2023-02-15 19:21:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:51,859 INFO L87 Difference]: Start difference. First operand 352 states and 487 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) [2023-02-15 19:21:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,897 INFO L93 Difference]: Finished difference Result 580 states and 799 transitions. [2023-02-15 19:21:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:21:51,897 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 [2023-02-15 19:21:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,900 INFO L225 Difference]: With dead ends: 580 [2023-02-15 19:21:51,900 INFO L226 Difference]: Without dead ends: 540 [2023-02-15 19:21:51,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:51,901 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 124 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:51,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 456 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-15 19:21:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2023-02-15 19:21:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3471074380165289) internal successors, (489), 364 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 19:21:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 539 transitions. [2023-02-15 19:21:51,916 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 539 transitions. Word has length 45 [2023-02-15 19:21:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,916 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 539 transitions. [2023-02-15 19:21:51,916 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) [2023-02-15 19:21:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 539 transitions. [2023-02-15 19:21:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 19:21:51,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,917 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] [2023-02-15 19:21:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 19:21:51,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,917 INFO L85 PathProgramCache]: Analyzing trace with hash 828308281, now seen corresponding path program 1 times [2023-02-15 19:21:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428753372] [2023-02-15 19:21:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:51,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428753372] [2023-02-15 19:21:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428753372] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:51,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101228094] [2023-02-15 19:21:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:51,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:51,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:51,956 INFO L87 Difference]: Start difference. First operand 390 states and 539 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) [2023-02-15 19:21:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:51,973 INFO L93 Difference]: Finished difference Result 406 states and 556 transitions. [2023-02-15 19:21:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:51,974 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 46 [2023-02-15 19:21:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:51,975 INFO L225 Difference]: With dead ends: 406 [2023-02-15 19:21:51,975 INFO L226 Difference]: Without dead ends: 390 [2023-02-15 19:21:51,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:51,976 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 393 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 [2023-02-15 19:21:51,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-15 19:21:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-15 19:21:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3415977961432506) internal successors, (487), 364 states have internal predecessors, (487), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 19:21:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 537 transitions. [2023-02-15 19:21:51,988 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 537 transitions. Word has length 46 [2023-02-15 19:21:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:51,988 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 537 transitions. [2023-02-15 19:21:51,988 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) [2023-02-15 19:21:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 537 transitions. [2023-02-15 19:21:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 19:21:51,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:51,989 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] [2023-02-15 19:21:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 19:21:51,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash 127243703, now seen corresponding path program 1 times [2023-02-15 19:21:51,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:51,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095959752] [2023-02-15 19:21:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:52,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:52,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:52,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:52,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095959752] [2023-02-15 19:21:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095959752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997905513] [2023-02-15 19:21:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:52,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:52,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:21:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:52,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 19:21:52,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:21:52,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:52,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997905513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:52,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:52,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-02-15 19:21:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160407213] [2023-02-15 19:21:52,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 19:21:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 19:21:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:21:52,365 INFO L87 Difference]: Start difference. First operand 390 states and 537 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 19:21:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:52,831 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2023-02-15 19:21:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 19:21:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2023-02-15 19:21:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:52,833 INFO L225 Difference]: With dead ends: 726 [2023-02-15 19:21:52,833 INFO L226 Difference]: Without dead ends: 339 [2023-02-15 19:21:52,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-15 19:21:52,834 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 320 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:52,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2042 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:21:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-15 19:21:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2023-02-15 19:21:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2023-02-15 19:21:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 364 transitions. [2023-02-15 19:21:52,843 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 364 transitions. Word has length 46 [2023-02-15 19:21:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:52,843 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 364 transitions. [2023-02-15 19:21:52,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 19:21:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 364 transitions. [2023-02-15 19:21:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:21:52,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:52,844 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] [2023-02-15 19:21:52,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 19:21:53,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:53,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash 705038931, now seen corresponding path program 1 times [2023-02-15 19:21:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:53,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424207917] [2023-02-15 19:21:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:53,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424207917] [2023-02-15 19:21:53,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424207917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207859247] [2023-02-15 19:21:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:53,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:53,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:53,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:21:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 19:21:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:53,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:53,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207859247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:53,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:53,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-15 19:21:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887594455] [2023-02-15 19:21:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:53,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:21:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:21:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:21:53,277 INFO L87 Difference]: Start difference. First operand 266 states and 364 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) [2023-02-15 19:21:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:53,408 INFO L93 Difference]: Finished difference Result 428 states and 595 transitions. [2023-02-15 19:21:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:21:53,408 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 [2023-02-15 19:21:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:53,409 INFO L225 Difference]: With dead ends: 428 [2023-02-15 19:21:53,409 INFO L226 Difference]: Without dead ends: 355 [2023-02-15 19:21:53,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-15 19:21:53,410 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 132 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:53,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 716 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-15 19:21:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2023-02-15 19:21:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 269 states have internal predecessors, (357), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2023-02-15 19:21:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 408 transitions. [2023-02-15 19:21:53,420 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 408 transitions. Word has length 48 [2023-02-15 19:21:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:53,420 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 408 transitions. [2023-02-15 19:21:53,420 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) [2023-02-15 19:21:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 408 transitions. [2023-02-15 19:21:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 19:21:53,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:53,420 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] [2023-02-15 19:21:53,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:53,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 19:21:53,625 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1641997822, now seen corresponding path program 1 times [2023-02-15 19:21:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036017385] [2023-02-15 19:21:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:21:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:21:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036017385] [2023-02-15 19:21:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036017385] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113127534] [2023-02-15 19:21:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:53,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:53,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:21:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 19:21:53,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:21:53,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:53,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113127534] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:53,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 14 [2023-02-15 19:21:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817660028] [2023-02-15 19:21:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:53,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 19:21:53,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 19:21:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:21:53,958 INFO L87 Difference]: Start difference. First operand 296 states and 408 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-02-15 19:21:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:54,302 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2023-02-15 19:21:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 19:21:54,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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 49 [2023-02-15 19:21:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:54,304 INFO L225 Difference]: With dead ends: 826 [2023-02-15 19:21:54,304 INFO L226 Difference]: Without dead ends: 582 [2023-02-15 19:21:54,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-02-15 19:21:54,305 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 516 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:54,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1098 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:21:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-15 19:21:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2023-02-15 19:21:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 480 states have (on average 1.3020833333333333) internal successors, (625), 484 states have internal predecessors, (625), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-15 19:21:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 720 transitions. [2023-02-15 19:21:54,323 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 720 transitions. Word has length 49 [2023-02-15 19:21:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:54,323 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 720 transitions. [2023-02-15 19:21:54,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-02-15 19:21:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 720 transitions. [2023-02-15 19:21:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 19:21:54,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:54,324 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] [2023-02-15 19:21:54,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:54,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 19:21:54,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 164141512, now seen corresponding path program 1 times [2023-02-15 19:21:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064261527] [2023-02-15 19:21:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064261527] [2023-02-15 19:21:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064261527] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:54,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:54,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:21:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431938948] [2023-02-15 19:21:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:54,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:21:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:54,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:21:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:21:54,666 INFO L87 Difference]: Start difference. First operand 532 states and 720 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) [2023-02-15 19:21:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:54,964 INFO L93 Difference]: Finished difference Result 655 states and 894 transitions. [2023-02-15 19:21:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:21:54,965 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 [2023-02-15 19:21:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:54,967 INFO L225 Difference]: With dead ends: 655 [2023-02-15 19:21:54,967 INFO L226 Difference]: Without dead ends: 637 [2023-02-15 19:21:54,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:21:54,967 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 279 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:54,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 807 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:21:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-02-15 19:21:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 568. [2023-02-15 19:21:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 512 states have (on average 1.298828125) internal successors, (665), 517 states have internal predecessors, (665), 50 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (53), 51 states have call predecessors, (53), 47 states have call successors, (53) [2023-02-15 19:21:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 768 transitions. [2023-02-15 19:21:54,996 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 768 transitions. Word has length 50 [2023-02-15 19:21:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:54,996 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 768 transitions. [2023-02-15 19:21:54,996 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) [2023-02-15 19:21:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 768 transitions. [2023-02-15 19:21:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:21:54,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:54,997 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] [2023-02-15 19:21:54,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 19:21:54,998 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:54,998 INFO L85 PathProgramCache]: Analyzing trace with hash 787153474, now seen corresponding path program 1 times [2023-02-15 19:21:54,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:54,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712575000] [2023-02-15 19:21:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712575000] [2023-02-15 19:21:55,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712575000] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764606892] [2023-02-15 19:21:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:55,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:55,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:55,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:21:55,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 19:21:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 19:21:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:55,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:55,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764606892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:55,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:55,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 20 [2023-02-15 19:21:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000439247] [2023-02-15 19:21:55,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:55,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:21:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:21:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:21:55,414 INFO L87 Difference]: Start difference. First operand 568 states and 768 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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) [2023-02-15 19:21:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:55,785 INFO L93 Difference]: Finished difference Result 1066 states and 1462 transitions. [2023-02-15 19:21:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 19:21:55,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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 52 [2023-02-15 19:21:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:55,791 INFO L225 Difference]: With dead ends: 1066 [2023-02-15 19:21:55,791 INFO L226 Difference]: Without dead ends: 908 [2023-02-15 19:21:55,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2023-02-15 19:21:55,792 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 439 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:55,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1256 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:21:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2023-02-15 19:21:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 748. [2023-02-15 19:21:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 672 states have (on average 1.2946428571428572) internal successors, (870), 678 states have internal predecessors, (870), 70 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (73), 72 states have call predecessors, (73), 67 states have call successors, (73) [2023-02-15 19:21:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2023-02-15 19:21:55,840 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 52 [2023-02-15 19:21:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:55,840 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2023-02-15 19:21:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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) [2023-02-15 19:21:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2023-02-15 19:21:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:21:55,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:55,842 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] [2023-02-15 19:21:55,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 19:21:56,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:56,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806460, now seen corresponding path program 1 times [2023-02-15 19:21:56,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671201716] [2023-02-15 19:21:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:21:56,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671201716] [2023-02-15 19:21:56,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671201716] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:56,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:56,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:56,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467835505] [2023-02-15 19:21:56,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:56,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:56,075 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:21:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:56,117 INFO L93 Difference]: Finished difference Result 757 states and 1021 transitions. [2023-02-15 19:21:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 19:21:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:56,120 INFO L225 Difference]: With dead ends: 757 [2023-02-15 19:21:56,120 INFO L226 Difference]: Without dead ends: 722 [2023-02-15 19:21:56,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:56,121 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 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 [2023-02-15 19:21:56,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2023-02-15 19:21:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 698. [2023-02-15 19:21:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 634 states have internal predecessors, (814), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2023-02-15 19:21:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 944 transitions. [2023-02-15 19:21:56,168 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 944 transitions. Word has length 52 [2023-02-15 19:21:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:56,169 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 944 transitions. [2023-02-15 19:21:56,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:21:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 944 transitions. [2023-02-15 19:21:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 19:21:56,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:56,170 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] [2023-02-15 19:21:56,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 19:21:56,170 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash -38305071, now seen corresponding path program 1 times [2023-02-15 19:21:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553078990] [2023-02-15 19:21:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:56,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553078990] [2023-02-15 19:21:56,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553078990] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:56,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:56,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:21:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476272521] [2023-02-15 19:21:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:21:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:21:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:21:56,228 INFO L87 Difference]: Start difference. First operand 698 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-02-15 19:21:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:56,291 INFO L93 Difference]: Finished difference Result 753 states and 1013 transitions. [2023-02-15 19:21:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:21:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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 54 [2023-02-15 19:21:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:56,294 INFO L225 Difference]: With dead ends: 753 [2023-02-15 19:21:56,294 INFO L226 Difference]: Without dead ends: 751 [2023-02-15 19:21:56,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:21:56,295 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:56,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 669 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-15 19:21:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2023-02-15 19:21:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 635 states have (on average 1.2929133858267716) internal successors, (821), 645 states have internal predecessors, (821), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (70), 65 states have call predecessors, (70), 65 states have call successors, (70) [2023-02-15 19:21:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 959 transitions. [2023-02-15 19:21:56,360 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 959 transitions. Word has length 54 [2023-02-15 19:21:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:56,360 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 959 transitions. [2023-02-15 19:21:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-02-15 19:21:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 959 transitions. [2023-02-15 19:21:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 19:21:56,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:56,362 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] [2023-02-15 19:21:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 19:21:56,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 18953231, now seen corresponding path program 1 times [2023-02-15 19:21:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222299246] [2023-02-15 19:21:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222299246] [2023-02-15 19:21:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222299246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:56,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:56,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:21:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2531927] [2023-02-15 19:21:56,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:21:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:21:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:21:56,427 INFO L87 Difference]: Start difference. First operand 710 states and 959 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-02-15 19:21:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:56,493 INFO L93 Difference]: Finished difference Result 775 states and 1043 transitions. [2023-02-15 19:21:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:21:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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 54 [2023-02-15 19:21:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:56,496 INFO L225 Difference]: With dead ends: 775 [2023-02-15 19:21:56,496 INFO L226 Difference]: Without dead ends: 773 [2023-02-15 19:21:56,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:21:56,496 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:56,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 697 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-02-15 19:21:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2023-02-15 19:21:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 638 states have (on average 1.29153605015674) internal successors, (824), 652 states have internal predecessors, (824), 72 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (74), 65 states have call predecessors, (74), 69 states have call successors, (74) [2023-02-15 19:21:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 970 transitions. [2023-02-15 19:21:56,538 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 970 transitions. Word has length 54 [2023-02-15 19:21:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:56,539 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 970 transitions. [2023-02-15 19:21:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-02-15 19:21:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 970 transitions. [2023-02-15 19:21:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 19:21:56,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:56,540 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] [2023-02-15 19:21:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 19:21:56,540 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -931744545, now seen corresponding path program 1 times [2023-02-15 19:21:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283571205] [2023-02-15 19:21:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:21:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:21:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283571205] [2023-02-15 19:21:56,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283571205] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:56,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:56,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 19:21:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066361502] [2023-02-15 19:21:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 19:21:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 19:21:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:21:56,884 INFO L87 Difference]: Start difference. First operand 718 states and 970 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 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) [2023-02-15 19:21:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:57,267 INFO L93 Difference]: Finished difference Result 755 states and 1013 transitions. [2023-02-15 19:21:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 19:21:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 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 54 [2023-02-15 19:21:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:57,269 INFO L225 Difference]: With dead ends: 755 [2023-02-15 19:21:57,270 INFO L226 Difference]: Without dead ends: 753 [2023-02-15 19:21:57,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:21:57,271 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 261 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:57,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1908 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:21:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-15 19:21:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2023-02-15 19:21:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 645 states have (on average 1.289922480620155) internal successors, (832), 660 states have internal predecessors, (832), 73 states have call successors, (73), 6 states have call predecessors, (73), 8 states have return successors, (75), 65 states have call predecessors, (75), 70 states have call successors, (75) [2023-02-15 19:21:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 980 transitions. [2023-02-15 19:21:57,343 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 980 transitions. Word has length 54 [2023-02-15 19:21:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:57,344 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 980 transitions. [2023-02-15 19:21:57,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 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) [2023-02-15 19:21:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 980 transitions. [2023-02-15 19:21:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:21:57,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:57,345 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] [2023-02-15 19:21:57,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 19:21:57,345 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1315627843, now seen corresponding path program 1 times [2023-02-15 19:21:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843958524] [2023-02-15 19:21:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843958524] [2023-02-15 19:21:57,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843958524] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327270433] [2023-02-15 19:21:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:57,649 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) [2023-02-15 19:21:57,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 19:21:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 19:21:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:57,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327270433] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:57,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:57,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 26 [2023-02-15 19:21:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886072735] [2023-02-15 19:21:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:57,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 19:21:57,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 19:21:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2023-02-15 19:21:57,870 INFO L87 Difference]: Start difference. First operand 727 states and 980 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 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) [2023-02-15 19:21:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:58,323 INFO L93 Difference]: Finished difference Result 1442 states and 1977 transitions. [2023-02-15 19:21:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:21:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 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 55 [2023-02-15 19:21:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:58,326 INFO L225 Difference]: With dead ends: 1442 [2023-02-15 19:21:58,327 INFO L226 Difference]: Without dead ends: 1135 [2023-02-15 19:21:58,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-02-15 19:21:58,329 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 280 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:58,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2296 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:21:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-02-15 19:21:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 851. [2023-02-15 19:21:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 765 states have (on average 1.2784313725490195) internal successors, (978), 780 states have internal predecessors, (978), 76 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (81), 69 states have call predecessors, (81), 73 states have call successors, (81) [2023-02-15 19:21:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1135 transitions. [2023-02-15 19:21:58,385 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1135 transitions. Word has length 55 [2023-02-15 19:21:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:58,386 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1135 transitions. [2023-02-15 19:21:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 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) [2023-02-15 19:21:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1135 transitions. [2023-02-15 19:21:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:21:58,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:58,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:58,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 19:21:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 19:21:58,592 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 997951512, now seen corresponding path program 1 times [2023-02-15 19:21:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063140585] [2023-02-15 19:21:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:21:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:58,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063140585] [2023-02-15 19:21:58,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063140585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:58,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862856384] [2023-02-15 19:21:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:58,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:58,934 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) [2023-02-15 19:21:58,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 19:21:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 19:21:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:21:59,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 19:21:59,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862856384] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:59,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:59,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 12] total 25 [2023-02-15 19:21:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733388237] [2023-02-15 19:21:59,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:21:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:21:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:21:59,350 INFO L87 Difference]: Start difference. First operand 851 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-15 19:21:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:59,515 INFO L93 Difference]: Finished difference Result 1050 states and 1379 transitions. [2023-02-15 19:21:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:21:59,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 55 [2023-02-15 19:21:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:59,518 INFO L225 Difference]: With dead ends: 1050 [2023-02-15 19:21:59,518 INFO L226 Difference]: Without dead ends: 977 [2023-02-15 19:21:59,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-02-15 19:21:59,519 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 273 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:59,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 490 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-02-15 19:21:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 851. [2023-02-15 19:21:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 765 states have (on average 1.2732026143790849) internal successors, (974), 780 states have internal predecessors, (974), 76 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (81), 69 states have call predecessors, (81), 73 states have call successors, (81) [2023-02-15 19:21:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2023-02-15 19:21:59,577 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 55 [2023-02-15 19:21:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:59,578 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2023-02-15 19:21:59,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-15 19:21:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2023-02-15 19:21:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 19:21:59,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:59,579 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] [2023-02-15 19:21:59,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:59,783 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,SelfDestructingSolverStorable23 [2023-02-15 19:21:59,783 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1754251371, now seen corresponding path program 1 times [2023-02-15 19:21:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464629900] [2023-02-15 19:21:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:59,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:21:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464629900] [2023-02-15 19:21:59,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464629900] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:59,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:59,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:59,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653988485] [2023-02-15 19:21:59,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:59,818 INFO L87 Difference]: Start difference. First operand 851 states and 1131 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2023-02-15 19:21:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:59,878 INFO L93 Difference]: Finished difference Result 1536 states and 2053 transitions. [2023-02-15 19:21:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 56 [2023-02-15 19:21:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:59,881 INFO L225 Difference]: With dead ends: 1536 [2023-02-15 19:21:59,881 INFO L226 Difference]: Without dead ends: 857 [2023-02-15 19:21:59,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:59,882 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:59,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 373 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-02-15 19:21:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 853. [2023-02-15 19:21:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 767 states have (on average 1.272490221642764) internal successors, (976), 782 states have internal predecessors, (976), 76 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (81), 69 states have call predecessors, (81), 73 states have call successors, (81) [2023-02-15 19:21:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1133 transitions. [2023-02-15 19:21:59,937 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1133 transitions. Word has length 56 [2023-02-15 19:21:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:59,938 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1133 transitions. [2023-02-15 19:21:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2023-02-15 19:21:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1133 transitions. [2023-02-15 19:21:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 19:21:59,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:59,939 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] [2023-02-15 19:21:59,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 19:21:59,939 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 396589989, now seen corresponding path program 1 times [2023-02-15 19:21:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38906819] [2023-02-15 19:21:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:22:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38906819] [2023-02-15 19:22:00,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38906819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:00,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:00,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:22:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424598251] [2023-02-15 19:22:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:22:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:22:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:22:00,036 INFO L87 Difference]: Start difference. First operand 853 states and 1133 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2023-02-15 19:22:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:00,327 INFO L93 Difference]: Finished difference Result 1262 states and 1664 transitions. [2023-02-15 19:22:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:22:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 57 [2023-02-15 19:22:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:00,330 INFO L225 Difference]: With dead ends: 1262 [2023-02-15 19:22:00,330 INFO L226 Difference]: Without dead ends: 1194 [2023-02-15 19:22:00,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:22:00,331 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 282 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:00,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 889 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:22:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2023-02-15 19:22:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 839. [2023-02-15 19:22:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 758 states have (on average 1.2638522427440633) internal successors, (958), 771 states have internal predecessors, (958), 71 states have call successors, (71), 6 states have call predecessors, (71), 9 states have return successors, (76), 65 states have call predecessors, (76), 68 states have call successors, (76) [2023-02-15 19:22:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1105 transitions. [2023-02-15 19:22:00,394 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1105 transitions. Word has length 57 [2023-02-15 19:22:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:00,394 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1105 transitions. [2023-02-15 19:22:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2023-02-15 19:22:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1105 transitions. [2023-02-15 19:22:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 19:22:00,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:00,396 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] [2023-02-15 19:22:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 19:22:00,396 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash 819291815, now seen corresponding path program 1 times [2023-02-15 19:22:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669439813] [2023-02-15 19:22:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:00,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669439813] [2023-02-15 19:22:00,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669439813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634497949] [2023-02-15 19:22:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:00,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:00,540 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) [2023-02-15 19:22:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 19:22:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 19:22:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:22:00,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:22:00,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634497949] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:00,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:22:00,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-02-15 19:22:00,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175149871] [2023-02-15 19:22:00,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:00,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:22:00,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:22:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:00,649 INFO L87 Difference]: Start difference. First operand 839 states and 1105 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2023-02-15 19:22:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:00,870 INFO L93 Difference]: Finished difference Result 1066 states and 1419 transitions. [2023-02-15 19:22:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:22:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 57 [2023-02-15 19:22:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:00,874 INFO L225 Difference]: With dead ends: 1066 [2023-02-15 19:22:00,874 INFO L226 Difference]: Without dead ends: 1012 [2023-02-15 19:22:00,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:22:00,875 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 207 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:00,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 840 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-02-15 19:22:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 749. [2023-02-15 19:22:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 676 states have (on average 1.2662721893491125) internal successors, (856), 689 states have internal predecessors, (856), 64 states have call successors, (64), 6 states have call predecessors, (64), 8 states have return successors, (67), 57 states have call predecessors, (67), 61 states have call successors, (67) [2023-02-15 19:22:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 987 transitions. [2023-02-15 19:22:00,937 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 987 transitions. Word has length 57 [2023-02-15 19:22:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:00,937 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 987 transitions. [2023-02-15 19:22:00,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2023-02-15 19:22:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 987 transitions. [2023-02-15 19:22:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 19:22:00,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:00,939 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] [2023-02-15 19:22:00,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 19:22:01,144 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1506046358, now seen corresponding path program 1 times [2023-02-15 19:22:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297232293] [2023-02-15 19:22:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297232293] [2023-02-15 19:22:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297232293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155371889] [2023-02-15 19:22:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:01,271 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) [2023-02-15 19:22:01,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 19:22:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 19:22:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:01,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:22:01,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155371889] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:01,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:22:01,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-15 19:22:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141163598] [2023-02-15 19:22:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:22:01,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:22:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:22:01,333 INFO L87 Difference]: Start difference. First operand 749 states and 987 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-15 19:22:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:01,383 INFO L93 Difference]: Finished difference Result 1063 states and 1422 transitions. [2023-02-15 19:22:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:22:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 57 [2023-02-15 19:22:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:01,385 INFO L225 Difference]: With dead ends: 1063 [2023-02-15 19:22:01,385 INFO L226 Difference]: Without dead ends: 789 [2023-02-15 19:22:01,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:22:01,386 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:01,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-02-15 19:22:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 769. [2023-02-15 19:22:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 696 states have (on average 1.2586206896551724) internal successors, (876), 709 states have internal predecessors, (876), 64 states have call successors, (64), 6 states have call predecessors, (64), 8 states have return successors, (67), 57 states have call predecessors, (67), 61 states have call successors, (67) [2023-02-15 19:22:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1007 transitions. [2023-02-15 19:22:01,444 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1007 transitions. Word has length 57 [2023-02-15 19:22:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:01,444 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1007 transitions. [2023-02-15 19:22:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-15 19:22:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1007 transitions. [2023-02-15 19:22:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 19:22:01,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:01,445 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] [2023-02-15 19:22:01,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 19:22:01,650 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,SelfDestructingSolverStorable27 [2023-02-15 19:22:01,651 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash 696699732, now seen corresponding path program 1 times [2023-02-15 19:22:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404577301] [2023-02-15 19:22:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:01,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404577301] [2023-02-15 19:22:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404577301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276893919] [2023-02-15 19:22:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:01,988 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) [2023-02-15 19:22:01,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 19:22:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 19:22:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:08,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276893919] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:08,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:08,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 46 [2023-02-15 19:22:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568800716] [2023-02-15 19:22:08,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 19:22:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 19:22:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 19:22:08,252 INFO L87 Difference]: Start difference. First operand 769 states and 1007 transitions. Second operand has 46 states, 43 states have (on average 2.488372093023256) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 19:22:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:11,444 INFO L93 Difference]: Finished difference Result 1377 states and 1827 transitions. [2023-02-15 19:22:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 19:22:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.488372093023256) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2023-02-15 19:22:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:11,448 INFO L225 Difference]: With dead ends: 1377 [2023-02-15 19:22:11,448 INFO L226 Difference]: Without dead ends: 1213 [2023-02-15 19:22:11,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=402, Invalid=4290, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 19:22:11,450 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1217 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 3966 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:11,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 3966 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 19:22:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-02-15 19:22:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 883. [2023-02-15 19:22:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 798 states have (on average 1.2593984962406015) internal successors, (1005), 811 states have internal predecessors, (1005), 74 states have call successors, (74), 7 states have call predecessors, (74), 10 states have return successors, (83), 68 states have call predecessors, (83), 71 states have call successors, (83) [2023-02-15 19:22:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1162 transitions. [2023-02-15 19:22:11,554 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1162 transitions. Word has length 57 [2023-02-15 19:22:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:11,555 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1162 transitions. [2023-02-15 19:22:11,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.488372093023256) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 19:22:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1162 transitions. [2023-02-15 19:22:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 19:22:11,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:11,558 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] [2023-02-15 19:22:11,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:11,762 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,SelfDestructingSolverStorable28 [2023-02-15 19:22:11,763 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1129526808, now seen corresponding path program 1 times [2023-02-15 19:22:11,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:11,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058808625] [2023-02-15 19:22:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058808625] [2023-02-15 19:22:12,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058808625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325779366] [2023-02-15 19:22:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:12,281 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) [2023-02-15 19:22:12,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 19:22:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 19:22:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:27,704 WARN L233 SmtUtils]: Spent 9.58s on a formula simplification. DAG size of input: 5912 DAG size of output: 5851 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)