./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_4-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:26:27,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:26:27,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:26:27,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:26:27,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:26:27,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:26:27,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:26:27,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:26:27,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:26:27,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:26:27,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:26:27,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:26:27,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:26:27,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:26:27,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:26:27,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:26:27,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:26:27,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:26:27,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:26:27,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:26:27,400 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:26:27,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:26:27,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:26:27,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:26:27,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:26:27,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:26:27,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:26:27,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:26:27,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:26:27,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:26:27,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:26:27,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:26:27,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:26:27,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:26:27,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:26:27,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:26:27,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:26:27,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:26:27,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:26:27,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:26:27,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:26:27,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:26:27,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:26:27,443 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:26:27,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:26:27,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:26:27,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:26:27,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:26:27,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:26:27,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:26:27,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:26:27,445 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:26:27,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:26:27,446 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:26:27,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:26:27,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:26:27,447 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:26:27,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:26:27,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:26:27,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:26:27,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:26:27,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:26:27,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:26:27,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:26:27,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-07-13 11:26:27,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:26:27,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:26:27,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:26:27,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:26:27,655 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:26:27,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-13 11:26:27,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c837deb94/78f3b338bf39436a8a8e64b654a7d7ea/FLAG0143fd253 [2022-07-13 11:26:27,979 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:26:27,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-13 11:26:27,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c837deb94/78f3b338bf39436a8a8e64b654a7d7ea/FLAG0143fd253 [2022-07-13 11:26:28,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c837deb94/78f3b338bf39436a8a8e64b654a7d7ea [2022-07-13 11:26:28,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:26:28,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:26:28,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:26:28,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:26:28,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:26:28,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b46de8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28, skipping insertion in model container [2022-07-13 11:26:28,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:26:28,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:26:28,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-13 11:26:28,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:26:28,635 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:26:28,647 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-13 11:26:28,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:26:28,700 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:26:28,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28 WrapperNode [2022-07-13 11:26:28,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:26:28,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:26:28,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:26:28,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:26:28,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,743 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-07-13 11:26:28,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:26:28,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:26:28,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:26:28,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:26:28,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:26:28,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:26:28,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:26:28,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:26:28,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (1/1) ... [2022-07-13 11:26:28,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:26:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:28,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:26:28,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:26:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:26:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:26:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-13 11:26:28,843 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-13 11:26:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:26:28,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:26:28,844 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-13 11:26:28,844 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-13 11:26:28,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 11:26:28,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 11:26:28,922 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:26:28,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:26:29,225 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:26:29,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:26:29,230 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:26:29,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:29 BoogieIcfgContainer [2022-07-13 11:26:29,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:26:29,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:26:29,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:26:29,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:26:29,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:26:28" (1/3) ... [2022-07-13 11:26:29,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7a9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:29, skipping insertion in model container [2022-07-13 11:26:29,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:28" (2/3) ... [2022-07-13 11:26:29,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7a9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:29, skipping insertion in model container [2022-07-13 11:26:29,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:29" (3/3) ... [2022-07-13 11:26:29,238 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-07-13 11:26:29,256 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:26:29,256 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:26:29,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:26:29,297 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f5604a6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67d01deb [2022-07-13 11:26:29,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:26:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 76 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 11:26:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 11:26:29,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:29,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:29,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1197400178, now seen corresponding path program 1 times [2022-07-13 11:26:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168057726] [2022-07-13 11:26:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168057726] [2022-07-13 11:26:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168057726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:29,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:29,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:26:29,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570178966] [2022-07-13 11:26:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:29,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:26:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:26:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:26:29,572 INFO L87 Difference]: Start difference. First operand has 88 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 76 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:29,661 INFO L93 Difference]: Finished difference Result 181 states and 304 transitions. [2022-07-13 11:26:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:26:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-13 11:26:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:29,672 INFO L225 Difference]: With dead ends: 181 [2022-07-13 11:26:29,673 INFO L226 Difference]: Without dead ends: 92 [2022-07-13 11:26:29,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:26:29,682 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 91 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:29,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-13 11:26:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2022-07-13 11:26:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 11:26:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2022-07-13 11:26:29,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 37 [2022-07-13 11:26:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:29,724 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2022-07-13 11:26:29,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2022-07-13 11:26:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:26:29,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:29,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:26:29,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1825768574, now seen corresponding path program 1 times [2022-07-13 11:26:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:29,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908275284] [2022-07-13 11:26:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:29,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:26:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908275284] [2022-07-13 11:26:30,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908275284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087599270] [2022-07-13 11:26:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:30,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:30,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:26:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 11:26:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:26:30,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:30,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087599270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:30,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 24 [2022-07-13 11:26:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490044229] [2022-07-13 11:26:30,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:30,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:26:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:26:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:26:30,476 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 11:26:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:32,664 INFO L93 Difference]: Finished difference Result 419 states and 662 transitions. [2022-07-13 11:26:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 11:26:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 44 [2022-07-13 11:26:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:32,672 INFO L225 Difference]: With dead ends: 419 [2022-07-13 11:26:32,672 INFO L226 Difference]: Without dead ends: 338 [2022-07-13 11:26:32,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 11:26:32,675 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1123 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:32,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 527 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 11:26:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-13 11:26:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-07-13 11:26:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 99 states have internal predecessors, (133), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-13 11:26:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 167 transitions. [2022-07-13 11:26:32,705 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 167 transitions. Word has length 44 [2022-07-13 11:26:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:32,706 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 167 transitions. [2022-07-13 11:26:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 11:26:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 167 transitions. [2022-07-13 11:26:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 11:26:32,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:32,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:32,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:32,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:32,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 48277341, now seen corresponding path program 1 times [2022-07-13 11:26:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915746569] [2022-07-13 11:26:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:32,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915746569] [2022-07-13 11:26:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915746569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:32,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:32,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:26:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653697400] [2022-07-13 11:26:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:32,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:33,000 INFO L87 Difference]: Start difference. First operand 116 states and 167 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:33,079 INFO L93 Difference]: Finished difference Result 212 states and 304 transitions. [2022-07-13 11:26:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-13 11:26:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:33,081 INFO L225 Difference]: With dead ends: 212 [2022-07-13 11:26:33,081 INFO L226 Difference]: Without dead ends: 132 [2022-07-13 11:26:33,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:26:33,082 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:33,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 192 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-13 11:26:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2022-07-13 11:26:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 100 states have internal predecessors, (132), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-13 11:26:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2022-07-13 11:26:33,105 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 43 [2022-07-13 11:26:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:33,106 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2022-07-13 11:26:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2022-07-13 11:26:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:26:33,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:33,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:26:33,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1481319558, now seen corresponding path program 1 times [2022-07-13 11:26:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:33,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341135996] [2022-07-13 11:26:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:26:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341135996] [2022-07-13 11:26:33,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341135996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:33,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:33,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-13 11:26:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657084540] [2022-07-13 11:26:33,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:33,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 11:26:33,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 11:26:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:26:33,342 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 11:26:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:34,474 INFO L93 Difference]: Finished difference Result 250 states and 358 transitions. [2022-07-13 11:26:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:26:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-07-13 11:26:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:34,477 INFO L225 Difference]: With dead ends: 250 [2022-07-13 11:26:34,477 INFO L226 Difference]: Without dead ends: 242 [2022-07-13 11:26:34,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-07-13 11:26:34,478 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 309 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:34,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 416 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2559 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:26:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-13 11:26:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 122. [2022-07-13 11:26:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 103 states have internal predecessors, (136), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (22), 14 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-13 11:26:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2022-07-13 11:26:34,499 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 44 [2022-07-13 11:26:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:34,500 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2022-07-13 11:26:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 11:26:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2022-07-13 11:26:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:26:34,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:34,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:34,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:26:34,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2095142826, now seen corresponding path program 1 times [2022-07-13 11:26:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191556988] [2022-07-13 11:26:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:26:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 11:26:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191556988] [2022-07-13 11:26:34,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191556988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:34,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:34,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:26:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942374212] [2022-07-13 11:26:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:26:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:26:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:26:34,555 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-13 11:26:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:34,873 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2022-07-13 11:26:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:26:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-07-13 11:26:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:34,875 INFO L225 Difference]: With dead ends: 179 [2022-07-13 11:26:34,875 INFO L226 Difference]: Without dead ends: 168 [2022-07-13 11:26:34,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:26:34,876 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 218 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:34,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 225 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:26:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-13 11:26:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2022-07-13 11:26:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.346938775510204) internal successors, (132), 101 states have internal predecessors, (132), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-13 11:26:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2022-07-13 11:26:34,885 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 46 [2022-07-13 11:26:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:34,885 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2022-07-13 11:26:34,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-13 11:26:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2022-07-13 11:26:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:26:34,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:34,886 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] [2022-07-13 11:26:34,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:26:34,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -937140365, now seen corresponding path program 1 times [2022-07-13 11:26:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656818920] [2022-07-13 11:26:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:26:34,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656818920] [2022-07-13 11:26:34,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656818920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:34,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:34,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:26:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698217247] [2022-07-13 11:26:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:26:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:26:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:26:34,950 INFO L87 Difference]: Start difference. First operand 119 states and 167 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:35,233 INFO L93 Difference]: Finished difference Result 222 states and 310 transitions. [2022-07-13 11:26:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:26:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-07-13 11:26:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:35,235 INFO L225 Difference]: With dead ends: 222 [2022-07-13 11:26:35,235 INFO L226 Difference]: Without dead ends: 166 [2022-07-13 11:26:35,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:26:35,236 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 160 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:35,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 488 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:26:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-13 11:26:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2022-07-13 11:26:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 106 states have internal predecessors, (137), 14 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-13 11:26:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-07-13 11:26:35,244 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 46 [2022-07-13 11:26:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:35,244 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-07-13 11:26:35,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-07-13 11:26:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:26:35,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:35,245 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] [2022-07-13 11:26:35,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:26:35,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash -783122765, now seen corresponding path program 1 times [2022-07-13 11:26:35,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:35,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131651055] [2022-07-13 11:26:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:35,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:26:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:26:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131651055] [2022-07-13 11:26:35,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131651055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922476939] [2022-07-13 11:26:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:35,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:35,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:35,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:35,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:26:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 11:26:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:35,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922476939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:36,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 13] total 34 [2022-07-13 11:26:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521177524] [2022-07-13 11:26:36,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 11:26:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 11:26:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 11:26:36,128 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:26:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:41,429 INFO L93 Difference]: Finished difference Result 483 states and 761 transitions. [2022-07-13 11:26:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 11:26:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-07-13 11:26:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:41,435 INFO L225 Difference]: With dead ends: 483 [2022-07-13 11:26:41,435 INFO L226 Difference]: Without dead ends: 472 [2022-07-13 11:26:41,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=739, Invalid=6233, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 11:26:41,442 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 874 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 9013 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 9206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 9013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:41,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 741 Invalid, 9206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 9013 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-13 11:26:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-07-13 11:26:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 164. [2022-07-13 11:26:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 131 states have (on average 1.282442748091603) internal successors, (168), 137 states have internal predecessors, (168), 21 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (58), 21 states have call predecessors, (58), 19 states have call successors, (58) [2022-07-13 11:26:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 247 transitions. [2022-07-13 11:26:41,470 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 247 transitions. Word has length 48 [2022-07-13 11:26:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 247 transitions. [2022-07-13 11:26:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:26:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 247 transitions. [2022-07-13 11:26:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:26:41,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:41,472 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] [2022-07-13 11:26:41,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-13 11:26:41,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1231057781, now seen corresponding path program 2 times [2022-07-13 11:26:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905341887] [2022-07-13 11:26:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:26:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:26:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:26:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:41,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905341887] [2022-07-13 11:26:41,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905341887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265478751] [2022-07-13 11:26:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:26:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:41,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:41,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:26:41,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:26:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:26:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 11:26:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:42,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:42,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265478751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:42,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:42,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-07-13 11:26:42,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294974830] [2022-07-13 11:26:42,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:42,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 11:26:42,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 11:26:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2022-07-13 11:26:42,290 INFO L87 Difference]: Start difference. First operand 164 states and 247 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-13 11:26:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:45,107 INFO L93 Difference]: Finished difference Result 348 states and 666 transitions. [2022-07-13 11:26:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 11:26:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) Word has length 48 [2022-07-13 11:26:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:45,109 INFO L225 Difference]: With dead ends: 348 [2022-07-13 11:26:45,109 INFO L226 Difference]: Without dead ends: 341 [2022-07-13 11:26:45,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 11:26:45,111 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 784 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 5160 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 5160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:45,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 466 Invalid, 5352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 5160 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:26:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-13 11:26:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 172. [2022-07-13 11:26:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 141 states have internal predecessors, (172), 25 states have call successors, (25), 5 states have call predecessors, (25), 11 states have return successors, (73), 25 states have call predecessors, (73), 23 states have call successors, (73) [2022-07-13 11:26:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 270 transitions. [2022-07-13 11:26:45,134 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 270 transitions. Word has length 48 [2022-07-13 11:26:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:45,135 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 270 transitions. [2022-07-13 11:26:45,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-13 11:26:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 270 transitions. [2022-07-13 11:26:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:26:45,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:45,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:45,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:45,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:45,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -415034277, now seen corresponding path program 1 times [2022-07-13 11:26:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529030222] [2022-07-13 11:26:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:26:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:26:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:45,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:45,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529030222] [2022-07-13 11:26:45,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529030222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292237264] [2022-07-13 11:26:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:45,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:45,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:26:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 11:26:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:26:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:45,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292237264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:45,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:45,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 24 [2022-07-13 11:26:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319726525] [2022-07-13 11:26:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:26:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:26:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:26:45,766 INFO L87 Difference]: Start difference. First operand 172 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:26:47,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:47,427 INFO L93 Difference]: Finished difference Result 342 states and 587 transitions. [2022-07-13 11:26:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 11:26:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2022-07-13 11:26:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:47,429 INFO L225 Difference]: With dead ends: 342 [2022-07-13 11:26:47,429 INFO L226 Difference]: Without dead ends: 331 [2022-07-13 11:26:47,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 11:26:47,431 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 384 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:47,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 536 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 11:26:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-13 11:26:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 172. [2022-07-13 11:26:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 141 states have internal predecessors, (172), 25 states have call successors, (25), 5 states have call predecessors, (25), 11 states have return successors, (73), 25 states have call predecessors, (73), 23 states have call successors, (73) [2022-07-13 11:26:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 270 transitions. [2022-07-13 11:26:47,444 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 270 transitions. Word has length 50 [2022-07-13 11:26:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:47,445 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 270 transitions. [2022-07-13 11:26:47,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:26:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 270 transitions. [2022-07-13 11:26:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:26:47,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:47,446 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] [2022-07-13 11:26:47,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:47,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2054485403, now seen corresponding path program 1 times [2022-07-13 11:26:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965909248] [2022-07-13 11:26:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:26:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:26:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:26:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:47,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965909248] [2022-07-13 11:26:47,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965909248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777238237] [2022-07-13 11:26:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:47,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:47,816 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:47,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:26:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:47,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:26:47,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:48,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777238237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:48,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:48,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 31 [2022-07-13 11:26:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670950060] [2022-07-13 11:26:48,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 11:26:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 11:26:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-07-13 11:26:48,235 INFO L87 Difference]: Start difference. First operand 172 states and 270 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 11:26:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:50,882 INFO L93 Difference]: Finished difference Result 343 states and 632 transitions. [2022-07-13 11:26:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 11:26:50,883 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) Word has length 50 [2022-07-13 11:26:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:50,884 INFO L225 Difference]: With dead ends: 343 [2022-07-13 11:26:50,885 INFO L226 Difference]: Without dead ends: 320 [2022-07-13 11:26:50,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=4107, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 11:26:50,886 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 760 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 4582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:50,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 457 Invalid, 4582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 11:26:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-13 11:26:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 180. [2022-07-13 11:26:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 145 states have internal predecessors, (177), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-13 11:26:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 287 transitions. [2022-07-13 11:26:50,902 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 287 transitions. Word has length 50 [2022-07-13 11:26:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:50,902 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 287 transitions. [2022-07-13 11:26:50,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 11:26:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 287 transitions. [2022-07-13 11:26:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:26:50,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:50,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:50,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:51,119 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,SelfDestructingSolverStorable9 [2022-07-13 11:26:51,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 904908130, now seen corresponding path program 1 times [2022-07-13 11:26:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345696170] [2022-07-13 11:26:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345696170] [2022-07-13 11:26:51,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345696170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:51,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:26:51,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647789771] [2022-07-13 11:26:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:51,165 INFO L87 Difference]: Start difference. First operand 180 states and 287 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:51,231 INFO L93 Difference]: Finished difference Result 304 states and 499 transitions. [2022-07-13 11:26:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-13 11:26:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:51,233 INFO L225 Difference]: With dead ends: 304 [2022-07-13 11:26:51,233 INFO L226 Difference]: Without dead ends: 188 [2022-07-13 11:26:51,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:26:51,235 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 94 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:51,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 191 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-13 11:26:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2022-07-13 11:26:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.2571428571428571) internal successors, (176), 145 states have internal predecessors, (176), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-13 11:26:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 286 transitions. [2022-07-13 11:26:51,246 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 286 transitions. Word has length 50 [2022-07-13 11:26:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:51,246 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 286 transitions. [2022-07-13 11:26:51,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:26:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 286 transitions. [2022-07-13 11:26:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:26:51,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:51,248 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] [2022-07-13 11:26:51,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:26:51,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1570607968, now seen corresponding path program 1 times [2022-07-13 11:26:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420649651] [2022-07-13 11:26:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 11:26:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:51,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420649651] [2022-07-13 11:26:51,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420649651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:51,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:51,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:26:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132961510] [2022-07-13 11:26:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:51,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:26:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:26:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:26:51,294 INFO L87 Difference]: Start difference. First operand 180 states and 286 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:26:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:51,491 INFO L93 Difference]: Finished difference Result 426 states and 699 transitions. [2022-07-13 11:26:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:26:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-07-13 11:26:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:51,498 INFO L225 Difference]: With dead ends: 426 [2022-07-13 11:26:51,499 INFO L226 Difference]: Without dead ends: 263 [2022-07-13 11:26:51,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:26:51,501 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 226 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:51,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 183 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:26:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-13 11:26:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 181. [2022-07-13 11:26:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 141 states have (on average 1.2553191489361701) internal successors, (177), 146 states have internal predecessors, (177), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-13 11:26:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2022-07-13 11:26:51,516 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 52 [2022-07-13 11:26:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:51,517 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2022-07-13 11:26:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:26:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2022-07-13 11:26:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:26:51,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:51,519 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] [2022-07-13 11:26:51,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:26:51,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:51,520 INFO L85 PathProgramCache]: Analyzing trace with hash -258774659, now seen corresponding path program 1 times [2022-07-13 11:26:51,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:51,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863805878] [2022-07-13 11:26:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 11:26:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-13 11:26:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:51,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:51,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863805878] [2022-07-13 11:26:51,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863805878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:51,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359112076] [2022-07-13 11:26:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:51,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:51,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:26:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 11:26:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:51,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:26:52,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359112076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:52,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:52,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-07-13 11:26:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110536931] [2022-07-13 11:26:52,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:52,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 11:26:52,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 11:26:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 11:26:52,169 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-13 11:26:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:57,675 INFO L93 Difference]: Finished difference Result 673 states and 1211 transitions. [2022-07-13 11:26:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 11:26:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 53 [2022-07-13 11:26:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:57,684 INFO L225 Difference]: With dead ends: 673 [2022-07-13 11:26:57,684 INFO L226 Difference]: Without dead ends: 553 [2022-07-13 11:26:57,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=836, Invalid=8284, Unknown=0, NotChecked=0, Total=9120 [2022-07-13 11:26:57,687 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1227 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 9109 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 9365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 9109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:57,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 833 Invalid, 9365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 9109 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-13 11:26:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-13 11:26:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 226. [2022-07-13 11:26:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 179 states have internal predecessors, (214), 40 states have call successors, (40), 5 states have call predecessors, (40), 14 states have return successors, (153), 41 states have call predecessors, (153), 38 states have call successors, (153) [2022-07-13 11:26:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 407 transitions. [2022-07-13 11:26:57,712 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 407 transitions. Word has length 53 [2022-07-13 11:26:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:57,712 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 407 transitions. [2022-07-13 11:26:57,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-13 11:26:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 407 transitions. [2022-07-13 11:26:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:26:57,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:57,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:57,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:57,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:57,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1119045026, now seen corresponding path program 1 times [2022-07-13 11:26:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346483979] [2022-07-13 11:26:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 11:26:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-13 11:26:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:26:57,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:57,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346483979] [2022-07-13 11:26:57,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346483979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:57,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377886358] [2022-07-13 11:26:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:57,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:57,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:57,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:26:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 11:26:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:58,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:58,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377886358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:58,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:58,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 20 [2022-07-13 11:26:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384361869] [2022-07-13 11:26:58,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:58,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 11:26:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 11:26:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:26:58,241 INFO L87 Difference]: Start difference. First operand 226 states and 407 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 11:26:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:59,808 INFO L93 Difference]: Finished difference Result 607 states and 1262 transitions. [2022-07-13 11:26:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 11:26:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 53 [2022-07-13 11:26:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:59,812 INFO L225 Difference]: With dead ends: 607 [2022-07-13 11:26:59,812 INFO L226 Difference]: Without dead ends: 396 [2022-07-13 11:26:59,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:26:59,815 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 535 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:59,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 529 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:26:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-13 11:26:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 257. [2022-07-13 11:26:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 201 states have internal predecessors, (238), 49 states have call successors, (49), 5 states have call predecessors, (49), 15 states have return successors, (206), 50 states have call predecessors, (206), 47 states have call successors, (206) [2022-07-13 11:26:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 493 transitions. [2022-07-13 11:26:59,841 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 493 transitions. Word has length 53 [2022-07-13 11:26:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:59,841 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 493 transitions. [2022-07-13 11:26:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 11:26:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 493 transitions. [2022-07-13 11:26:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:26:59,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:59,843 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] [2022-07-13 11:26:59,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 11:27:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:00,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash 960202435, now seen corresponding path program 1 times [2022-07-13 11:27:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:00,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128660922] [2022-07-13 11:27:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:00,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:27:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:00,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128660922] [2022-07-13 11:27:00,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128660922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851294779] [2022-07-13 11:27:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:00,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:00,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:27:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:27:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:00,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851294779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:00,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:00,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 11:27:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134276953] [2022-07-13 11:27:00,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:00,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 11:27:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 11:27:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:27:00,322 INFO L87 Difference]: Start difference. First operand 257 states and 493 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:01,032 INFO L93 Difference]: Finished difference Result 612 states and 1340 transitions. [2022-07-13 11:27:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:27:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-07-13 11:27:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:01,038 INFO L225 Difference]: With dead ends: 612 [2022-07-13 11:27:01,038 INFO L226 Difference]: Without dead ends: 495 [2022-07-13 11:27:01,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:27:01,042 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 237 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:01,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 848 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:27:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-13 11:27:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 269. [2022-07-13 11:27:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 203 states have (on average 1.2315270935960592) internal successors, (250), 213 states have internal predecessors, (250), 47 states have call successors, (47), 7 states have call predecessors, (47), 18 states have return successors, (196), 48 states have call predecessors, (196), 45 states have call successors, (196) [2022-07-13 11:27:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 493 transitions. [2022-07-13 11:27:01,079 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 493 transitions. Word has length 53 [2022-07-13 11:27:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:01,079 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 493 transitions. [2022-07-13 11:27:01,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 493 transitions. [2022-07-13 11:27:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:27:01,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:01,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:01,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:01,303 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,SelfDestructingSolverStorable14 [2022-07-13 11:27:01,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash 896532657, now seen corresponding path program 1 times [2022-07-13 11:27:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:01,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014054313] [2022-07-13 11:27:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 11:27:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:27:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 11:27:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:27:01,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014054313] [2022-07-13 11:27:01,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014054313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687655811] [2022-07-13 11:27:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:01,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:01,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:27:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:27:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:27:01,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:01,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687655811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:01,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:27:01,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-13 11:27:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062669206] [2022-07-13 11:27:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:27:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:27:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:27:01,417 INFO L87 Difference]: Start difference. First operand 269 states and 493 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:01,464 INFO L93 Difference]: Finished difference Result 496 states and 883 transitions. [2022-07-13 11:27:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:27:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-07-13 11:27:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:01,466 INFO L225 Difference]: With dead ends: 496 [2022-07-13 11:27:01,466 INFO L226 Difference]: Without dead ends: 276 [2022-07-13 11:27:01,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:27:01,468 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 14 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:01,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 334 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-13 11:27:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-07-13 11:27:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 214 states have internal predecessors, (252), 47 states have call successors, (47), 7 states have call predecessors, (47), 18 states have return successors, (196), 48 states have call predecessors, (196), 45 states have call successors, (196) [2022-07-13 11:27:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 495 transitions. [2022-07-13 11:27:01,501 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 495 transitions. Word has length 54 [2022-07-13 11:27:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:01,501 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 495 transitions. [2022-07-13 11:27:01,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 495 transitions. [2022-07-13 11:27:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:27:01,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:01,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:01,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 11:27:01,715 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1591568488, now seen corresponding path program 1 times [2022-07-13 11:27:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391993034] [2022-07-13 11:27:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 11:27:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 11:27:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:27:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:27:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391993034] [2022-07-13 11:27:01,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391993034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:01,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:01,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 11:27:01,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980971444] [2022-07-13 11:27:01,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:01,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 11:27:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 11:27:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:27:01,958 INFO L87 Difference]: Start difference. First operand 270 states and 495 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:03,176 INFO L93 Difference]: Finished difference Result 399 states and 824 transitions. [2022-07-13 11:27:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:27:03,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2022-07-13 11:27:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:03,179 INFO L225 Difference]: With dead ends: 399 [2022-07-13 11:27:03,179 INFO L226 Difference]: Without dead ends: 388 [2022-07-13 11:27:03,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-07-13 11:27:03,180 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 328 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:03,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 297 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 11:27:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-13 11:27:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 268. [2022-07-13 11:27:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 203 states have (on average 1.2364532019704433) internal successors, (251), 213 states have internal predecessors, (251), 46 states have call successors, (46), 7 states have call predecessors, (46), 18 states have return successors, (195), 47 states have call predecessors, (195), 44 states have call successors, (195) [2022-07-13 11:27:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 492 transitions. [2022-07-13 11:27:03,212 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 492 transitions. Word has length 55 [2022-07-13 11:27:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:03,212 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 492 transitions. [2022-07-13 11:27:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 492 transitions. [2022-07-13 11:27:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:03,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:03,213 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-13 11:27:03,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:27:03,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1366808055, now seen corresponding path program 1 times [2022-07-13 11:27:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375859713] [2022-07-13 11:27:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:03,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:27:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375859713] [2022-07-13 11:27:03,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375859713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127365832] [2022-07-13 11:27:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:03,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 11:27:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:27:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:03,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127365832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:03,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:27:03,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2022-07-13 11:27:03,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125647682] [2022-07-13 11:27:03,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:03,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:27:03,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:27:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:03,427 INFO L87 Difference]: Start difference. First operand 268 states and 492 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:03,629 INFO L93 Difference]: Finished difference Result 713 states and 1456 transitions. [2022-07-13 11:27:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:27:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-13 11:27:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:03,633 INFO L225 Difference]: With dead ends: 713 [2022-07-13 11:27:03,633 INFO L226 Difference]: Without dead ends: 656 [2022-07-13 11:27:03,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:27:03,635 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 447 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:03,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1209 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-07-13 11:27:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 367. [2022-07-13 11:27:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 289 states have (on average 1.245674740484429) internal successors, (360), 303 states have internal predecessors, (360), 54 states have call successors, (54), 8 states have call predecessors, (54), 23 states have return successors, (208), 55 states have call predecessors, (208), 51 states have call successors, (208) [2022-07-13 11:27:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 622 transitions. [2022-07-13 11:27:03,679 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 622 transitions. Word has length 57 [2022-07-13 11:27:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:03,679 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 622 transitions. [2022-07-13 11:27:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 622 transitions. [2022-07-13 11:27:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:03,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:03,681 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-13 11:27:03,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:03,898 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,SelfDestructingSolverStorable17 [2022-07-13 11:27:03,898 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1759835065, now seen corresponding path program 1 times [2022-07-13 11:27:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593069835] [2022-07-13 11:27:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:27:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:03,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593069835] [2022-07-13 11:27:03,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593069835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464962497] [2022-07-13 11:27:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:03,975 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:03,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 11:27:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:04,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:04,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464962497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:04,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:27:04,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-07-13 11:27:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988998085] [2022-07-13 11:27:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:04,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:27:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:27:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:27:04,126 INFO L87 Difference]: Start difference. First operand 367 states and 622 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:04,322 INFO L93 Difference]: Finished difference Result 940 states and 1800 transitions. [2022-07-13 11:27:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:27:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-13 11:27:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:04,326 INFO L225 Difference]: With dead ends: 940 [2022-07-13 11:27:04,326 INFO L226 Difference]: Without dead ends: 759 [2022-07-13 11:27:04,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:27:04,328 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 376 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:04,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1123 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-07-13 11:27:04,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 429. [2022-07-13 11:27:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 339 states have (on average 1.247787610619469) internal successors, (423), 355 states have internal predecessors, (423), 63 states have call successors, (63), 9 states have call predecessors, (63), 26 states have return successors, (223), 64 states have call predecessors, (223), 59 states have call successors, (223) [2022-07-13 11:27:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 709 transitions. [2022-07-13 11:27:04,380 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 709 transitions. Word has length 57 [2022-07-13 11:27:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:04,380 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 709 transitions. [2022-07-13 11:27:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 709 transitions. [2022-07-13 11:27:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:04,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:04,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-13 11:27:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:04,599 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1500821561, now seen corresponding path program 1 times [2022-07-13 11:27:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466901677] [2022-07-13 11:27:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:27:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:04,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466901677] [2022-07-13 11:27:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466901677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505106703] [2022-07-13 11:27:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:04,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:04,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:04,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:04,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 11:27:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:04,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:04,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:04,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505106703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:04,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:27:04,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-07-13 11:27:04,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936657204] [2022-07-13 11:27:04,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:04,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:27:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:27:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:27:04,795 INFO L87 Difference]: Start difference. First operand 429 states and 709 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:04,892 INFO L93 Difference]: Finished difference Result 567 states and 1011 transitions. [2022-07-13 11:27:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:27:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-13 11:27:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:04,908 INFO L225 Difference]: With dead ends: 567 [2022-07-13 11:27:04,909 INFO L226 Difference]: Without dead ends: 476 [2022-07-13 11:27:04,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:27:04,910 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 53 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:04,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1163 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-13 11:27:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2022-07-13 11:27:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 278 states have (on average 1.2625899280575539) internal successors, (351), 292 states have internal predecessors, (351), 53 states have call successors, (53), 6 states have call predecessors, (53), 21 states have return successors, (201), 54 states have call predecessors, (201), 50 states have call successors, (201) [2022-07-13 11:27:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 605 transitions. [2022-07-13 11:27:04,945 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 605 transitions. Word has length 57 [2022-07-13 11:27:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:04,945 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 605 transitions. [2022-07-13 11:27:04,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 605 transitions. [2022-07-13 11:27:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:04,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:04,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:04,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:05,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:05,159 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -267239054, now seen corresponding path program 2 times [2022-07-13 11:27:05,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:05,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287138321] [2022-07-13 11:27:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:05,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:05,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:05,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287138321] [2022-07-13 11:27:05,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287138321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:05,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:05,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:27:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867218290] [2022-07-13 11:27:05,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:05,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:05,229 INFO L87 Difference]: Start difference. First operand 353 states and 605 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:05,723 INFO L93 Difference]: Finished difference Result 797 states and 1460 transitions. [2022-07-13 11:27:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:27:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-07-13 11:27:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:05,735 INFO L225 Difference]: With dead ends: 797 [2022-07-13 11:27:05,735 INFO L226 Difference]: Without dead ends: 548 [2022-07-13 11:27:05,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:05,738 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 432 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:05,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 593 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:27:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-13 11:27:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 454. [2022-07-13 11:27:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 371 states have (on average 1.2425876010781671) internal successors, (461), 388 states have internal predecessors, (461), 56 states have call successors, (56), 8 states have call predecessors, (56), 26 states have return successors, (191), 57 states have call predecessors, (191), 53 states have call successors, (191) [2022-07-13 11:27:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 708 transitions. [2022-07-13 11:27:05,774 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 708 transitions. Word has length 57 [2022-07-13 11:27:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:05,774 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 708 transitions. [2022-07-13 11:27:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 708 transitions. [2022-07-13 11:27:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:05,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:05,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:27:05,776 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1278356304, now seen corresponding path program 1 times [2022-07-13 11:27:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377999250] [2022-07-13 11:27:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:05,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377999250] [2022-07-13 11:27:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377999250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616970542] [2022-07-13 11:27:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:05,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:05,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 11:27:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:27:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:05,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616970542] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:05,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:05,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11, 10] total 12 [2022-07-13 11:27:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970005575] [2022-07-13 11:27:05,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:05,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:27:05,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:05,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:27:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:27:05,970 INFO L87 Difference]: Start difference. First operand 454 states and 708 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:06,010 INFO L93 Difference]: Finished difference Result 773 states and 1323 transitions. [2022-07-13 11:27:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:27:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-07-13 11:27:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:06,013 INFO L225 Difference]: With dead ends: 773 [2022-07-13 11:27:06,013 INFO L226 Difference]: Without dead ends: 474 [2022-07-13 11:27:06,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:27:06,018 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:06,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 225 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-13 11:27:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-07-13 11:27:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 391 states have (on average 1.225063938618926) internal successors, (479), 408 states have internal predecessors, (479), 56 states have call successors, (56), 8 states have call predecessors, (56), 26 states have return successors, (191), 57 states have call predecessors, (191), 53 states have call successors, (191) [2022-07-13 11:27:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 726 transitions. [2022-07-13 11:27:06,056 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 726 transitions. Word has length 57 [2022-07-13 11:27:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:06,057 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 726 transitions. [2022-07-13 11:27:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 726 transitions. [2022-07-13 11:27:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:06,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:06,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:06,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:06,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 11:27:06,276 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1276509262, now seen corresponding path program 1 times [2022-07-13 11:27:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072134050] [2022-07-13 11:27:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:06,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072134050] [2022-07-13 11:27:06,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072134050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:06,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:06,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:27:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853666426] [2022-07-13 11:27:06,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:06,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:06,398 INFO L87 Difference]: Start difference. First operand 474 states and 726 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:06,876 INFO L93 Difference]: Finished difference Result 788 states and 1126 transitions. [2022-07-13 11:27:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:27:06,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-07-13 11:27:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:06,879 INFO L225 Difference]: With dead ends: 788 [2022-07-13 11:27:06,879 INFO L226 Difference]: Without dead ends: 614 [2022-07-13 11:27:06,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:27:06,880 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 210 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:06,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 684 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:27:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-07-13 11:27:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 576. [2022-07-13 11:27:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 484 states have (on average 1.225206611570248) internal successors, (593), 503 states have internal predecessors, (593), 61 states have call successors, (61), 10 states have call predecessors, (61), 30 states have return successors, (192), 62 states have call predecessors, (192), 58 states have call successors, (192) [2022-07-13 11:27:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 846 transitions. [2022-07-13 11:27:06,926 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 846 transitions. Word has length 57 [2022-07-13 11:27:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:06,926 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 846 transitions. [2022-07-13 11:27:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 846 transitions. [2022-07-13 11:27:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:27:06,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:06,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:27:06,929 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1410522768, now seen corresponding path program 1 times [2022-07-13 11:27:06,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:06,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992387095] [2022-07-13 11:27:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992387095] [2022-07-13 11:27:07,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992387095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:07,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:07,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 11:27:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546127747] [2022-07-13 11:27:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:07,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:27:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:27:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:27:07,092 INFO L87 Difference]: Start difference. First operand 576 states and 846 transitions. Second operand has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:07,701 INFO L93 Difference]: Finished difference Result 715 states and 1031 transitions. [2022-07-13 11:27:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:27:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-07-13 11:27:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:07,705 INFO L225 Difference]: With dead ends: 715 [2022-07-13 11:27:07,706 INFO L226 Difference]: Without dead ends: 608 [2022-07-13 11:27:07,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:27:07,707 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 268 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:07,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 860 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:27:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-13 11:27:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 570. [2022-07-13 11:27:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 477 states have (on average 1.220125786163522) internal successors, (582), 496 states have internal predecessors, (582), 61 states have call successors, (61), 11 states have call predecessors, (61), 31 states have return successors, (192), 62 states have call predecessors, (192), 58 states have call successors, (192) [2022-07-13 11:27:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 835 transitions. [2022-07-13 11:27:07,753 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 835 transitions. Word has length 57 [2022-07-13 11:27:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:07,754 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 835 transitions. [2022-07-13 11:27:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 835 transitions. [2022-07-13 11:27:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:27:07,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:07,757 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, 1, 1, 1, 1] [2022-07-13 11:27:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:27:07,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1069512791, now seen corresponding path program 1 times [2022-07-13 11:27:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:07,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025186048] [2022-07-13 11:27:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 11:27:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:27:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:27:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 11:27:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:07,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025186048] [2022-07-13 11:27:07,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025186048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:07,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625959546] [2022-07-13 11:27:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:07,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:07,848 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:07,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 11:27:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 11:27:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:07,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:08,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625959546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:08,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:08,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-13 11:27:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000504067] [2022-07-13 11:27:08,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:08,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 11:27:08,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 11:27:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:27:08,141 INFO L87 Difference]: Start difference. First operand 570 states and 835 transitions. Second operand has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:27:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:10,599 INFO L93 Difference]: Finished difference Result 980 states and 1544 transitions. [2022-07-13 11:27:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 11:27:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 59 [2022-07-13 11:27:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:10,607 INFO L225 Difference]: With dead ends: 980 [2022-07-13 11:27:10,607 INFO L226 Difference]: Without dead ends: 793 [2022-07-13 11:27:10,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 11:27:10,611 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 616 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4643 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 4752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:10,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 530 Invalid, 4752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4643 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:27:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-07-13 11:27:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 566. [2022-07-13 11:27:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 475 states have (on average 1.2147368421052631) internal successors, (577), 494 states have internal predecessors, (577), 59 states have call successors, (59), 11 states have call predecessors, (59), 31 states have return successors, (182), 60 states have call predecessors, (182), 56 states have call successors, (182) [2022-07-13 11:27:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 818 transitions. [2022-07-13 11:27:10,672 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 818 transitions. Word has length 59 [2022-07-13 11:27:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:10,672 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 818 transitions. [2022-07-13 11:27:10,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 11:27:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 818 transitions. [2022-07-13 11:27:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:10,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:10,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2022-07-13 11:27:10,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:10,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:10,889 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2004112473, now seen corresponding path program 1 times [2022-07-13 11:27:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654373810] [2022-07-13 11:27:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 11:27:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 11:27:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654373810] [2022-07-13 11:27:10,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654373810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266616734] [2022-07-13 11:27:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:10,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:10,992 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:10,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 11:27:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 11:27:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 11:27:11,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 11:27:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266616734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:11,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:11,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-07-13 11:27:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656122250] [2022-07-13 11:27:11,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:27:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:27:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:11,221 INFO L87 Difference]: Start difference. First operand 566 states and 818 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:27:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:12,849 INFO L93 Difference]: Finished difference Result 1166 states and 1747 transitions. [2022-07-13 11:27:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 11:27:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-07-13 11:27:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:12,852 INFO L225 Difference]: With dead ends: 1166 [2022-07-13 11:27:12,852 INFO L226 Difference]: Without dead ends: 871 [2022-07-13 11:27:12,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:27:12,854 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 913 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:12,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 539 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:27:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-13 11:27:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 646. [2022-07-13 11:27:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 550 states have (on average 1.2054545454545456) internal successors, (663), 572 states have internal predecessors, (663), 59 states have call successors, (59), 13 states have call predecessors, (59), 36 states have return successors, (148), 60 states have call predecessors, (148), 56 states have call successors, (148) [2022-07-13 11:27:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 870 transitions. [2022-07-13 11:27:12,912 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 870 transitions. Word has length 60 [2022-07-13 11:27:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:12,913 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 870 transitions. [2022-07-13 11:27:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:27:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 870 transitions. [2022-07-13 11:27:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 11:27:12,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:12,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:12,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 11:27:13,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -912833732, now seen corresponding path program 1 times [2022-07-13 11:27:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:13,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910610158] [2022-07-13 11:27:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:27:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:27:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910610158] [2022-07-13 11:27:13,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910610158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901307772] [2022-07-13 11:27:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:13,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:13,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:13,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 11:27:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:13,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:13,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901307772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:13,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:13,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2022-07-13 11:27:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936631727] [2022-07-13 11:27:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:13,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:27:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:27:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:13,419 INFO L87 Difference]: Start difference. First operand 646 states and 870 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:14,556 INFO L93 Difference]: Finished difference Result 1353 states and 1960 transitions. [2022-07-13 11:27:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:27:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 61 [2022-07-13 11:27:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:14,562 INFO L225 Difference]: With dead ends: 1353 [2022-07-13 11:27:14,562 INFO L226 Difference]: Without dead ends: 1130 [2022-07-13 11:27:14,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-07-13 11:27:14,563 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 358 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:14,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 408 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:27:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-13 11:27:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 619. [2022-07-13 11:27:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 531 states have (on average 1.2090395480225988) internal successors, (642), 551 states have internal predecessors, (642), 55 states have call successors, (55), 11 states have call predecessors, (55), 32 states have return successors, (138), 56 states have call predecessors, (138), 52 states have call successors, (138) [2022-07-13 11:27:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 835 transitions. [2022-07-13 11:27:14,622 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 835 transitions. Word has length 61 [2022-07-13 11:27:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:14,622 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 835 transitions. [2022-07-13 11:27:14,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 835 transitions. [2022-07-13 11:27:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:14,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:14,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:14,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 11:27:14,839 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1971885056, now seen corresponding path program 1 times [2022-07-13 11:27:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496972324] [2022-07-13 11:27:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:14,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496972324] [2022-07-13 11:27:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496972324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211506377] [2022-07-13 11:27:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:14,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:14,909 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:14,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 11:27:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:14,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:27:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:14,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:15,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211506377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:15,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:15,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-13 11:27:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975776144] [2022-07-13 11:27:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:15,041 INFO L87 Difference]: Start difference. First operand 619 states and 835 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:15,539 INFO L93 Difference]: Finished difference Result 1079 states and 1458 transitions. [2022-07-13 11:27:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 11:27:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-07-13 11:27:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:15,542 INFO L225 Difference]: With dead ends: 1079 [2022-07-13 11:27:15,542 INFO L226 Difference]: Without dead ends: 781 [2022-07-13 11:27:15,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:15,543 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 271 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:15,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 636 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:27:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-07-13 11:27:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 612. [2022-07-13 11:27:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 523 states have (on average 1.2084130019120458) internal successors, (632), 544 states have internal predecessors, (632), 55 states have call successors, (55), 11 states have call predecessors, (55), 33 states have return successors, (137), 56 states have call predecessors, (137), 52 states have call successors, (137) [2022-07-13 11:27:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 824 transitions. [2022-07-13 11:27:15,611 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 824 transitions. Word has length 60 [2022-07-13 11:27:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:15,612 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 824 transitions. [2022-07-13 11:27:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 824 transitions. [2022-07-13 11:27:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:15,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:15,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:15,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 11:27:15,829 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1645255748, now seen corresponding path program 1 times [2022-07-13 11:27:15,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970200566] [2022-07-13 11:27:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:27:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970200566] [2022-07-13 11:27:15,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970200566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425657973] [2022-07-13 11:27:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:15,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:27:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:15,874 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:27:15,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 11:27:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:27:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:27:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:27:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425657973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:16,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:27:16,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-13 11:27:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369251136] [2022-07-13 11:27:16,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:27:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:27:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:16,103 INFO L87 Difference]: Start difference. First operand 612 states and 824 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:16,921 INFO L93 Difference]: Finished difference Result 1344 states and 1916 transitions. [2022-07-13 11:27:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 11:27:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2022-07-13 11:27:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:16,924 INFO L225 Difference]: With dead ends: 1344 [2022-07-13 11:27:16,924 INFO L226 Difference]: Without dead ends: 970 [2022-07-13 11:27:16,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 11:27:16,927 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 542 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:16,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 423 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:27:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-07-13 11:27:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 700. [2022-07-13 11:27:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 603 states have (on average 1.1956882255389718) internal successors, (721), 629 states have internal predecessors, (721), 56 states have call successors, (56), 13 states have call predecessors, (56), 40 states have return successors, (147), 57 states have call predecessors, (147), 53 states have call successors, (147) [2022-07-13 11:27:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 924 transitions. [2022-07-13 11:27:16,997 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 924 transitions. Word has length 60 [2022-07-13 11:27:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:16,997 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 924 transitions. [2022-07-13 11:27:16,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 924 transitions. [2022-07-13 11:27:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:16,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:16,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:17,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 11:27:17,215 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -155190960, now seen corresponding path program 1 times [2022-07-13 11:27:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501696196] [2022-07-13 11:27:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:17,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:17,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501696196] [2022-07-13 11:27:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501696196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:17,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:17,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:27:17,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708910639] [2022-07-13 11:27:17,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:27:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:27:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:27:17,273 INFO L87 Difference]: Start difference. First operand 700 states and 924 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:18,197 INFO L93 Difference]: Finished difference Result 1626 states and 2413 transitions. [2022-07-13 11:27:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 11:27:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-13 11:27:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:18,202 INFO L225 Difference]: With dead ends: 1626 [2022-07-13 11:27:18,202 INFO L226 Difference]: Without dead ends: 1446 [2022-07-13 11:27:18,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:27:18,214 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 340 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:18,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 799 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:27:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-07-13 11:27:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 891. [2022-07-13 11:27:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 774 states have (on average 1.198966408268734) internal successors, (928), 807 states have internal predecessors, (928), 66 states have call successors, (66), 16 states have call predecessors, (66), 50 states have return successors, (172), 67 states have call predecessors, (172), 63 states have call successors, (172) [2022-07-13 11:27:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1166 transitions. [2022-07-13 11:27:18,301 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1166 transitions. Word has length 60 [2022-07-13 11:27:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:18,302 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1166 transitions. [2022-07-13 11:27:18,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1166 transitions. [2022-07-13 11:27:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:18,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:18,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:18,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 11:27:18,304 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash -833017452, now seen corresponding path program 1 times [2022-07-13 11:27:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11893258] [2022-07-13 11:27:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:18,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:18,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:18,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11893258] [2022-07-13 11:27:18,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11893258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:18,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:18,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:27:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470777132] [2022-07-13 11:27:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:18,356 INFO L87 Difference]: Start difference. First operand 891 states and 1166 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:18,965 INFO L93 Difference]: Finished difference Result 1902 states and 2781 transitions. [2022-07-13 11:27:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 11:27:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-13 11:27:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:18,970 INFO L225 Difference]: With dead ends: 1902 [2022-07-13 11:27:18,970 INFO L226 Difference]: Without dead ends: 1585 [2022-07-13 11:27:18,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:27:18,972 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 735 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:18,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 519 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:27:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-07-13 11:27:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 998. [2022-07-13 11:27:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 865 states have (on average 1.1965317919075145) internal successors, (1035), 904 states have internal predecessors, (1035), 74 states have call successors, (74), 18 states have call predecessors, (74), 58 states have return successors, (192), 75 states have call predecessors, (192), 71 states have call successors, (192) [2022-07-13 11:27:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1301 transitions. [2022-07-13 11:27:19,081 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1301 transitions. Word has length 60 [2022-07-13 11:27:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:19,082 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 1301 transitions. [2022-07-13 11:27:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1301 transitions. [2022-07-13 11:27:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:27:19,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:19,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:27:19,084 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash -289204466, now seen corresponding path program 2 times [2022-07-13 11:27:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627048193] [2022-07-13 11:27:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:27:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:27:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:27:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:27:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:27:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627048193] [2022-07-13 11:27:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627048193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:19,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:19,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:27:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458844334] [2022-07-13 11:27:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:27:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:19,151 INFO L87 Difference]: Start difference. First operand 998 states and 1301 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:19,646 INFO L93 Difference]: Finished difference Result 1370 states and 1883 transitions. [2022-07-13 11:27:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 11:27:19,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-13 11:27:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:19,649 INFO L225 Difference]: With dead ends: 1370 [2022-07-13 11:27:19,649 INFO L226 Difference]: Without dead ends: 1145 [2022-07-13 11:27:19,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:19,651 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 208 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:19,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 594 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:27:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-13 11:27:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 907. [2022-07-13 11:27:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 783 states have (on average 1.1915708812260537) internal successors, (933), 818 states have internal predecessors, (933), 69 states have call successors, (69), 18 states have call predecessors, (69), 54 states have return successors, (178), 70 states have call predecessors, (178), 66 states have call successors, (178) [2022-07-13 11:27:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1180 transitions. [2022-07-13 11:27:19,741 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1180 transitions. Word has length 60 [2022-07-13 11:27:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:19,742 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1180 transitions. [2022-07-13 11:27:19,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1180 transitions. [2022-07-13 11:27:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:27:19,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:19,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:19,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 11:27:19,743 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 814388103, now seen corresponding path program 1 times [2022-07-13 11:27:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:27:19,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355409853] [2022-07-13 11:27:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:27:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 11:27:19,756 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 11:27:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 11:27:19,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 11:27:19,780 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 11:27:19,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 11:27:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:27:19,783 INFO L356 BasicCegarLoop]: Path program histogram: [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] [2022-07-13 11:27:19,785 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 11:27:19,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 11:27:19 BoogieIcfgContainer [2022-07-13 11:27:19,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 11:27:19,817 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 11:27:19,817 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 11:27:19,817 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 11:27:19,817 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:29" (3/4) ... [2022-07-13 11:27:19,819 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 11:27:19,819 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 11:27:19,820 INFO L158 Benchmark]: Toolchain (without parser) took 51396.01ms. Allocated memory was 102.8MB in the beginning and 224.4MB in the end (delta: 121.6MB). Free memory was 74.2MB in the beginning and 165.0MB in the end (delta: -90.8MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 59.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.97ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 74.3MB in the end (delta: -92.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.91ms. Allocated memory is still 102.8MB. Free memory was 74.3MB in the beginning and 72.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: Boogie Preprocessor took 41.60ms. Allocated memory is still 102.8MB. Free memory was 72.6MB in the beginning and 71.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: RCFGBuilder took 445.06ms. Allocated memory is still 102.8MB. Free memory was 70.9MB in the beginning and 54.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-07-13 11:27:19,820 INFO L158 Benchmark]: TraceAbstraction took 50583.53ms. Allocated memory was 102.8MB in the beginning and 224.4MB in the end (delta: 121.6MB). Free memory was 53.6MB in the beginning and 166.0MB in the end (delta: -112.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2022-07-13 11:27:19,821 INFO L158 Benchmark]: Witness Printer took 2.54ms. Allocated memory is still 224.4MB. Free memory was 166.0MB in the beginning and 165.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:27:19,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 59.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.97ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 74.3MB in the end (delta: -92.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.91ms. Allocated memory is still 102.8MB. Free memory was 74.3MB in the beginning and 72.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.60ms. Allocated memory is still 102.8MB. Free memory was 72.6MB in the beginning and 71.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 445.06ms. Allocated memory is still 102.8MB. Free memory was 70.9MB in the beginning and 54.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 50583.53ms. Allocated memory was 102.8MB in the beginning and 224.4MB in the end (delta: 121.6MB). Free memory was 53.6MB in the beginning and 166.0MB in the end (delta: -112.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Witness Printer took 2.54ms. Allocated memory is still 224.4MB. Free memory was 166.0MB in the beginning and 165.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L81] return (__retres4); VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, \result=0, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L77] m = m & ~ (1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L78] res = m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L79] __retres4 = res VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, __retres4=4278190080, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L81] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, \result=8573157376, __retres4=4278190080, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=8573157376, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, ma=16777216, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L81] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, \result=4294967295, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4278190080, base2flt(mb, eb)=4294967295, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4278190080, b=4294967295, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L102] COND FALSE !(! b) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L109] ma = a & ((1U << 24U) - 1U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L111] ma = ma | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L112] mb = b & ((1U << 24U) - 1U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, eb=383, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L114] mb = mb | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, eb=383, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4278190090, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L17] COND TRUE !(cond) VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, cond=0, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L18] reach_error() VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, cond=0, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 88 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50.5s, OverallIterations: 33, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 36.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13522 SdHoareTripleChecker+Valid, 25.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13246 mSDsluCounter, 17715 SdHoareTripleChecker+Invalid, 21.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11990 mSDsCounter, 1950 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66817 IncrementalHoareTripleChecker+Invalid, 68767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1950 mSolverCounterUnsat, 5725 mSDtfsCounter, 66817 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2827 GetRequests, 1899 SyntacticMatches, 17 SemanticMatches, 911 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6960 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=998occurred in iteration=31, InterpolantAutomatonStates: 653, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 32 MinimizatonAttempts, 5833 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 2748 NumberOfCodeBlocks, 2748 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 3378 ConstructedInterpolants, 0 QuantifiedInterpolants, 8805 SizeOfPredicates, 95 NumberOfNonLiveVariables, 3982 ConjunctsInSsa, 292 ConjunctsInUnsatCore, 64 InterpolantComputations, 19 PerfectInterpolantSequences, 1053/1266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-13 11:27:19,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:27:21,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:27:21,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:27:21,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:27:21,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:27:21,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:27:21,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:27:21,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:27:21,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:27:21,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:27:21,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:27:21,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:27:21,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:27:21,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:27:21,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:27:21,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:27:21,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:27:21,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:27:21,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:27:21,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:27:21,476 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:27:21,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:27:21,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:27:21,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:27:21,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:27:21,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:27:21,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:27:21,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:27:21,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:27:21,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:27:21,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:27:21,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:27:21,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:27:21,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:27:21,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:27:21,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:27:21,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:27:21,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:27:21,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:27:21,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:27:21,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:27:21,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:27:21,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 11:27:21,523 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:27:21,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:27:21,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:27:21,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:27:21,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:27:21,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:27:21,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:27:21,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:27:21,525 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:27:21,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:27:21,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:27:21,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:27:21,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:27:21,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 11:27:21,528 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-07-13 11:27:21,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:27:21,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:27:21,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:27:21,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:27:21,763 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:27:21,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-13 11:27:21,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb824d38f/33b54c9be6df4efa975f2077d38a44aa/FLAGe79936d06 [2022-07-13 11:27:22,165 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:27:22,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-13 11:27:22,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb824d38f/33b54c9be6df4efa975f2077d38a44aa/FLAGe79936d06 [2022-07-13 11:27:22,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb824d38f/33b54c9be6df4efa975f2077d38a44aa [2022-07-13 11:27:22,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:27:22,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:27:22,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:27:22,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:27:22,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:27:22,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6f0fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22, skipping insertion in model container [2022-07-13 11:27:22,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:27:22,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:27:22,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-13 11:27:22,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:27:22,781 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:27:22,791 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-13 11:27:22,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:27:22,824 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:27:22,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22 WrapperNode [2022-07-13 11:27:22,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:27:22,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:27:22,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:27:22,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:27:22,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,865 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-07-13 11:27:22,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:27:22,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:27:22,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:27:22,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:27:22,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:27:22,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:27:22,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:27:22,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:27:22,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (1/1) ... [2022-07-13 11:27:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:27:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:27:22,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:27:22,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:27:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:27:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:27:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-13 11:27:22,974 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-13 11:27:22,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:27:22,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:27:22,974 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-13 11:27:22,975 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-13 11:27:22,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 11:27:22,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 11:27:23,044 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:27:23,045 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:27:23,223 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:27:23,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:27:23,231 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:27:23,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:27:23 BoogieIcfgContainer [2022-07-13 11:27:23,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:27:23,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:27:23,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:27:23,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:27:23,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:27:22" (1/3) ... [2022-07-13 11:27:23,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef9264b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:27:23, skipping insertion in model container [2022-07-13 11:27:23,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:27:22" (2/3) ... [2022-07-13 11:27:23,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef9264b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:27:23, skipping insertion in model container [2022-07-13 11:27:23,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:27:23" (3/3) ... [2022-07-13 11:27:23,239 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-07-13 11:27:23,248 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:27:23,249 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:27:23,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:27:23,287 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47d23d6c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14000c3b [2022-07-13 11:27:23,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:27:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 11:27:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 11:27:23,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:23,296 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] [2022-07-13 11:27:23,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2022-07-13 11:27:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:23,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059291560] [2022-07-13 11:27:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:23,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:23,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:23,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:27:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:27:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:23,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:23,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059291560] [2022-07-13 11:27:23,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059291560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:23,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:23,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:27:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132517484] [2022-07-13 11:27:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:27:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:27:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:23,568 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:23,698 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2022-07-13 11:27:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:27:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-13 11:27:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:23,707 INFO L225 Difference]: With dead ends: 130 [2022-07-13 11:27:23,708 INFO L226 Difference]: Without dead ends: 71 [2022-07-13 11:27:23,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:27:23,714 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:23,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-13 11:27:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-07-13 11:27:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-13 11:27:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-07-13 11:27:23,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2022-07-13 11:27:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:23,754 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-07-13 11:27:23,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-07-13 11:27:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:27:23,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:23,757 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] [2022-07-13 11:27:23,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:23,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1468368814, now seen corresponding path program 1 times [2022-07-13 11:27:23,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:23,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645766011] [2022-07-13 11:27:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:23,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:23,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:23,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:23,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:27:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:24,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:24,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645766011] [2022-07-13 11:27:24,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645766011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:24,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:24,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-13 11:27:24,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995109251] [2022-07-13 11:27:24,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:24,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:27:24,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:27:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:27:24,165 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:24,268 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-07-13 11:27:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:27:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-13 11:27:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:24,272 INFO L225 Difference]: With dead ends: 121 [2022-07-13 11:27:24,272 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 11:27:24,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:27:24,278 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:24,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 484 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 11:27:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-07-13 11:27:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-13 11:27:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-07-13 11:27:24,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2022-07-13 11:27:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:24,290 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-07-13 11:27:24,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:27:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-07-13 11:27:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 11:27:24,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:24,291 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-13 11:27:24,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:24,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:24,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2022-07-13 11:27:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:24,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555355530] [2022-07-13 11:27:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:24,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:24,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:27:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:27:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:24,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 11:27:24,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555355530] [2022-07-13 11:27:24,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555355530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:24,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:24,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-13 11:27:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687337589] [2022-07-13 11:27:24,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:27:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:27:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:24,652 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:24,719 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-07-13 11:27:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:27:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-13 11:27:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:24,721 INFO L225 Difference]: With dead ends: 113 [2022-07-13 11:27:24,721 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 11:27:24,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:27:24,722 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:24,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 455 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 11:27:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-07-13 11:27:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.25) internal successors, (75), 62 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-13 11:27:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-07-13 11:27:24,728 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 39 [2022-07-13 11:27:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:24,729 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-07-13 11:27:24,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-07-13 11:27:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 11:27:24,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:24,730 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] [2022-07-13 11:27:24,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:24,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2022-07-13 11:27:24,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:24,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271882745] [2022-07-13 11:27:24,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:27:24,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:24,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:24,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:27:24,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 11:27:24,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:27:24,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:25,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:25,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:25,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271882745] [2022-07-13 11:27:25,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271882745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:25,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:25,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:27:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182958244] [2022-07-13 11:27:25,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:27:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:27:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:27:25,042 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:25,083 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-07-13 11:27:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:27:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-13 11:27:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:25,085 INFO L225 Difference]: With dead ends: 96 [2022-07-13 11:27:25,085 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 11:27:25,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:25,086 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:25,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 333 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-13 11:27:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 11:27:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-07-13 11:27:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.25) internal successors, (80), 67 states have internal predecessors, (80), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-13 11:27:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-07-13 11:27:25,096 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 39 [2022-07-13 11:27:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:25,097 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-07-13 11:27:25,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-07-13 11:27:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 11:27:25,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:25,098 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] [2022-07-13 11:27:25,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:25,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash 518419771, now seen corresponding path program 1 times [2022-07-13 11:27:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23625466] [2022-07-13 11:27:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:25,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:27:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:25,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:27:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:25,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:25,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23625466] [2022-07-13 11:27:25,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23625466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:25,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:25,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:27:25,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553048797] [2022-07-13 11:27:25,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:25,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:27:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:27:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:27:25,408 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:25,453 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-13 11:27:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:27:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-13 11:27:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:25,455 INFO L225 Difference]: With dead ends: 96 [2022-07-13 11:27:25,455 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 11:27:25,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:25,456 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:25,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 304 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-07-13 11:27:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 11:27:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-13 11:27:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 65 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-13 11:27:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-07-13 11:27:25,463 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 39 [2022-07-13 11:27:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:25,463 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-07-13 11:27:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:27:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-07-13 11:27:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:27:25,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:25,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:25,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:25,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2022-07-13 11:27:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679214260] [2022-07-13 11:27:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:25,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:25,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:25,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:27:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:27:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:27:25,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:25,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679214260] [2022-07-13 11:27:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679214260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:25,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:25,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:27:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683343748] [2022-07-13 11:27:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:25,785 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:26,000 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2022-07-13 11:27:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:27:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-07-13 11:27:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:26,002 INFO L225 Difference]: With dead ends: 126 [2022-07-13 11:27:26,002 INFO L226 Difference]: Without dead ends: 119 [2022-07-13 11:27:26,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:27:26,003 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 34 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:26,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 651 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:27:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-13 11:27:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2022-07-13 11:27:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 76 states have internal predecessors, (91), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-13 11:27:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2022-07-13 11:27:26,012 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 44 [2022-07-13 11:27:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:26,012 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2022-07-13 11:27:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2022-07-13 11:27:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:27:26,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:26,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:26,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:26,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:26,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2022-07-13 11:27:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144073204] [2022-07-13 11:27:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:26,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:26,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:26,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:26,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:27:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:27:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:27:26,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:27:26,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144073204] [2022-07-13 11:27:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144073204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:26,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:26,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-07-13 11:27:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711861566] [2022-07-13 11:27:26,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:27:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:27:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:27:26,486 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:26,685 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-07-13 11:27:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:27:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-07-13 11:27:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:26,687 INFO L225 Difference]: With dead ends: 133 [2022-07-13 11:27:26,687 INFO L226 Difference]: Without dead ends: 125 [2022-07-13 11:27:26,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:27:26,688 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 50 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:26,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 692 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-13 11:27:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2022-07-13 11:27:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-13 11:27:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-07-13 11:27:26,695 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 46 [2022-07-13 11:27:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-07-13 11:27:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-07-13 11:27:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:27:26,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:26,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:26,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2022-07-13 11:27:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204590544] [2022-07-13 11:27:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:26,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:26,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:26,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:27:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:27:26,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 11:27:26,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:26,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204590544] [2022-07-13 11:27:26,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204590544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:26,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:26,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:27:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202174522] [2022-07-13 11:27:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:26,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:27:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:27:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:27:26,959 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-13 11:27:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:26,989 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2022-07-13 11:27:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:27:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-07-13 11:27:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:26,992 INFO L225 Difference]: With dead ends: 119 [2022-07-13 11:27:26,992 INFO L226 Difference]: Without dead ends: 104 [2022-07-13 11:27:26,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:26,995 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:26,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-13 11:27:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-13 11:27:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-13 11:27:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-07-13 11:27:27,008 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 46 [2022-07-13 11:27:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:27,009 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-07-13 11:27:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-13 11:27:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-07-13 11:27:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:27:27,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:27,010 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] [2022-07-13 11:27:27,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:27,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:27,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2022-07-13 11:27:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358781322] [2022-07-13 11:27:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:27,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:27,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 11:27:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 11:27:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:27,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:27,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:27,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358781322] [2022-07-13 11:27:27,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358781322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:27,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:27,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-13 11:27:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713128017] [2022-07-13 11:27:27,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:27:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:27:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:27:27,644 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:28,399 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2022-07-13 11:27:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 11:27:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-07-13 11:27:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:28,400 INFO L225 Difference]: With dead ends: 151 [2022-07-13 11:27:28,400 INFO L226 Difference]: Without dead ends: 114 [2022-07-13 11:27:28,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 11:27:28,402 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 99 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:28,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1232 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:27:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-13 11:27:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2022-07-13 11:27:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 68 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-13 11:27:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2022-07-13 11:27:28,407 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 48 [2022-07-13 11:27:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:28,408 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2022-07-13 11:27:28,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2022-07-13 11:27:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:27:28,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:28,409 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] [2022-07-13 11:27:28,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:28,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:28,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2022-07-13 11:27:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149297201] [2022-07-13 11:27:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:27:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:28,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:28,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 11:27:28,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:27:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:27:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 11:27:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:28,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:29,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149297201] [2022-07-13 11:27:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149297201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:29,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:29,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-13 11:27:29,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801673922] [2022-07-13 11:27:29,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:27:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:27:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:27:29,045 INFO L87 Difference]: Start difference. First operand 86 states and 115 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:29,761 INFO L93 Difference]: Finished difference Result 126 states and 173 transitions. [2022-07-13 11:27:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:27:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-07-13 11:27:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:29,762 INFO L225 Difference]: With dead ends: 126 [2022-07-13 11:27:29,762 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 11:27:29,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 11:27:29,763 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 123 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:29,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1023 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:27:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 11:27:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2022-07-13 11:27:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2022-07-13 11:27:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2022-07-13 11:27:29,770 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 48 [2022-07-13 11:27:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:29,770 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2022-07-13 11:27:29,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2022-07-13 11:27:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 11:27:29,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:29,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:29,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:29,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2022-07-13 11:27:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973974850] [2022-07-13 11:27:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:29,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:29,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 11:27:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:32,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:32,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973974850] [2022-07-13 11:27:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973974850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:32,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:32,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:27:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934753827] [2022-07-13 11:27:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:27:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:27:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-13 11:27:32,219 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:32,251 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-07-13 11:27:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:27:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-13 11:27:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:32,252 INFO L225 Difference]: With dead ends: 95 [2022-07-13 11:27:32,252 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 11:27:32,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-07-13 11:27:32,253 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:32,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-07-13 11:27:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 11:27:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-13 11:27:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-07-13 11:27:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-07-13 11:27:32,266 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 49 [2022-07-13 11:27:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:32,266 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-07-13 11:27:32,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-07-13 11:27:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:27:32,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:32,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:32,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:32,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:32,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2022-07-13 11:27:32,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:32,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614075781] [2022-07-13 11:27:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:32,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:32,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:32,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 11:27:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:27:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:32,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 11:27:32,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614075781] [2022-07-13 11:27:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614075781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:32,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-13 11:27:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562572772] [2022-07-13 11:27:32,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:27:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:27:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:27:32,801 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:33,092 INFO L93 Difference]: Finished difference Result 129 states and 179 transitions. [2022-07-13 11:27:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:27:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-07-13 11:27:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:33,093 INFO L225 Difference]: With dead ends: 129 [2022-07-13 11:27:33,094 INFO L226 Difference]: Without dead ends: 118 [2022-07-13 11:27:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:27:33,094 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 60 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:33,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 846 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:27:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-13 11:27:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2022-07-13 11:27:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-13 11:27:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-07-13 11:27:33,102 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 50 [2022-07-13 11:27:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:33,102 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-07-13 11:27:33,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 11:27:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-07-13 11:27:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:27:33,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:33,103 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] [2022-07-13 11:27:33,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:33,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1583051783, now seen corresponding path program 1 times [2022-07-13 11:27:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:33,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913247638] [2022-07-13 11:27:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:33,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:33,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:33,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 11:27:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:27:33,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:33,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913247638] [2022-07-13 11:27:33,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913247638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:33,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:33,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:27:33,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138126747] [2022-07-13 11:27:33,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:33,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:27:33,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:33,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:27:33,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:27:33,411 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:33,503 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2022-07-13 11:27:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:27:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-07-13 11:27:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:33,504 INFO L225 Difference]: With dead ends: 159 [2022-07-13 11:27:33,504 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 11:27:33,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:27:33,505 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 13 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:33,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 501 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 11:27:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-07-13 11:27:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-13 11:27:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-13 11:27:33,510 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 54 [2022-07-13 11:27:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:33,510 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-13 11:27:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 11:27:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-13 11:27:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:27:33,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:33,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:33,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:33,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2022-07-13 11:27:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:33,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274644218] [2022-07-13 11:27:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:33,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:33,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:33,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 11:27:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:33,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:27:37,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:37,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274644218] [2022-07-13 11:27:37,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274644218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:37,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:37,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:27:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432180008] [2022-07-13 11:27:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:27:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:27:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-07-13 11:27:37,748 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:37,769 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-07-13 11:27:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:27:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-13 11:27:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:37,770 INFO L225 Difference]: With dead ends: 94 [2022-07-13 11:27:37,771 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 11:27:37,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-07-13 11:27:37,771 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:37,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 361 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-13 11:27:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 11:27:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-07-13 11:27:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-13 11:27:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-07-13 11:27:37,776 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2022-07-13 11:27:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:37,776 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-07-13 11:27:37,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:27:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-07-13 11:27:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:27:37,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:37,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2022-07-13 11:27:37,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:37,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:37,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2022-07-13 11:27:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15145086] [2022-07-13 11:27:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:37,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:37,985 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:37,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 11:27:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:38,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:38,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:38,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15145086] [2022-07-13 11:27:38,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15145086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:38,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-13 11:27:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060751871] [2022-07-13 11:27:38,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:38,183 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:38,330 INFO L93 Difference]: Finished difference Result 111 states and 163 transitions. [2022-07-13 11:27:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:27:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-07-13 11:27:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:38,332 INFO L225 Difference]: With dead ends: 111 [2022-07-13 11:27:38,332 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:27:38,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:27:38,332 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 119 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:38,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 481 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:27:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-07-13 11:27:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2022-07-13 11:27:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-07-13 11:27:38,337 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 54 [2022-07-13 11:27:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:38,338 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-07-13 11:27:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:27:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-07-13 11:27:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 11:27:38,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:38,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:38,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:38,545 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2022-07-13 11:27:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378790105] [2022-07-13 11:27:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:38,547 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 11:27:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:38,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:38,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378790105] [2022-07-13 11:27:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378790105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:38,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:38,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-13 11:27:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171649628] [2022-07-13 11:27:38,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:38,782 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:38,949 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2022-07-13 11:27:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:27:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-07-13 11:27:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:38,950 INFO L225 Difference]: With dead ends: 111 [2022-07-13 11:27:38,950 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:27:38,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:27:38,951 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:38,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 495 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:27:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-07-13 11:27:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2022-07-13 11:27:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-13 11:27:38,956 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 63 [2022-07-13 11:27:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:38,957 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-13 11:27:38,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-13 11:27:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 11:27:38,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:38,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-07-13 11:27:38,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:39,164 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2022-07-13 11:27:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:39,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358061587] [2022-07-13 11:27:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:39,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:39,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:39,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 11:27:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:39,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:39,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:39,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358061587] [2022-07-13 11:27:39,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358061587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:39,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:39,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-13 11:27:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463635842] [2022-07-13 11:27:39,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:39,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:39,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:39,386 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:39,525 INFO L93 Difference]: Finished difference Result 109 states and 153 transitions. [2022-07-13 11:27:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:27:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-07-13 11:27:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:39,527 INFO L225 Difference]: With dead ends: 109 [2022-07-13 11:27:39,527 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 11:27:39,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:27:39,527 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 101 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:39,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 565 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 11:27:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-07-13 11:27:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-13 11:27:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2022-07-13 11:27:39,532 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 63 [2022-07-13 11:27:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:39,532 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2022-07-13 11:27:39,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2022-07-13 11:27:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:27:39,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:39,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:27:39,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:39,734 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2022-07-13 11:27:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783102572] [2022-07-13 11:27:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:39,736 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:39,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-13 11:27:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:39,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:27:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:39,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:27:39,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:39,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783102572] [2022-07-13 11:27:39,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783102572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:39,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:39,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-13 11:27:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321476207] [2022-07-13 11:27:39,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:27:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:27:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:27:39,950 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:40,101 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-07-13 11:27:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:27:40,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-13 11:27:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:40,102 INFO L225 Difference]: With dead ends: 106 [2022-07-13 11:27:40,102 INFO L226 Difference]: Without dead ends: 92 [2022-07-13 11:27:40,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:27:40,103 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:40,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 522 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-13 11:27:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-07-13 11:27:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-07-13 11:27:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2022-07-13 11:27:40,107 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 65 [2022-07-13 11:27:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:40,108 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2022-07-13 11:27:40,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2022-07-13 11:27:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:27:40,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:40,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:40,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:40,316 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1951422266, now seen corresponding path program 1 times [2022-07-13 11:27:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436594435] [2022-07-13 11:27:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:40,318 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:40,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-13 11:27:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 11:27:40,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:27:40,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:40,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436594435] [2022-07-13 11:27:40,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436594435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:40,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:40,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:27:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337413264] [2022-07-13 11:27:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:40,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:27:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:27:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:27:40,688 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:41,105 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2022-07-13 11:27:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:27:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2022-07-13 11:27:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:41,106 INFO L225 Difference]: With dead ends: 108 [2022-07-13 11:27:41,106 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 11:27:41,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:27:41,107 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:41,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 508 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:27:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 11:27:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-07-13 11:27:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-13 11:27:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2022-07-13 11:27:41,113 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 72 [2022-07-13 11:27:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:41,113 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2022-07-13 11:27:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2022-07-13 11:27:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:27:41,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:41,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:41,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:41,321 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2022-07-13 11:27:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:41,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099601445] [2022-07-13 11:27:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:41,323 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:41,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-13 11:27:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:27:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:27:41,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:27:42,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099601445] [2022-07-13 11:27:42,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099601445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:42,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:42,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-13 11:27:42,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661170203] [2022-07-13 11:27:42,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:42,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:27:42,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:27:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:42,846 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:44,997 INFO L93 Difference]: Finished difference Result 113 states and 155 transitions. [2022-07-13 11:27:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:27:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2022-07-13 11:27:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:44,999 INFO L225 Difference]: With dead ends: 113 [2022-07-13 11:27:44,999 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 11:27:45,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:27:45,000 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:45,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 827 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 11:27:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 11:27:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-07-13 11:27:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.208955223880597) internal successors, (81), 72 states have internal predecessors, (81), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-13 11:27:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2022-07-13 11:27:45,006 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 72 [2022-07-13 11:27:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:45,006 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2022-07-13 11:27:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2022-07-13 11:27:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:27:45,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:45,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:45,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:45,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2022-07-13 11:27:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:45,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950357067] [2022-07-13 11:27:45,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:27:45,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:45,222 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:45,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-13 11:27:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:27:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:27:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:27:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:27:45,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:27:46,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:46,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950357067] [2022-07-13 11:27:46,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950357067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:46,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:46,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-13 11:27:46,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240674089] [2022-07-13 11:27:46,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:46,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:27:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:27:46,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:46,736 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:48,899 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2022-07-13 11:27:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:27:48,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2022-07-13 11:27:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:48,901 INFO L225 Difference]: With dead ends: 111 [2022-07-13 11:27:48,901 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 11:27:48,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:27:48,902 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 165 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:48,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 752 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:27:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 11:27:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2022-07-13 11:27:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-13 11:27:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-07-13 11:27:48,908 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 72 [2022-07-13 11:27:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:48,908 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-07-13 11:27:48,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-07-13 11:27:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:27:48,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:48,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:48,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-13 11:27:49,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:49,119 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash 324909818, now seen corresponding path program 1 times [2022-07-13 11:27:49,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:49,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802841658] [2022-07-13 11:27:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:49,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:49,120 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:49,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-13 11:27:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 11:27:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:27:49,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:49,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802841658] [2022-07-13 11:27:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802841658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:49,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:49,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:27:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490063946] [2022-07-13 11:27:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:27:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:27:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:27:49,456 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:49,849 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2022-07-13 11:27:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:27:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2022-07-13 11:27:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:49,851 INFO L225 Difference]: With dead ends: 99 [2022-07-13 11:27:49,851 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 11:27:49,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:27:49,852 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 28 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 437 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:27:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 11:27:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-07-13 11:27:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-13 11:27:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-07-13 11:27:49,856 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 72 [2022-07-13 11:27:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:49,856 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-07-13 11:27:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-07-13 11:27:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 11:27:49,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:49,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:49,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-13 11:27:50,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:50,064 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1031466431, now seen corresponding path program 1 times [2022-07-13 11:27:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:50,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236328931] [2022-07-13 11:27:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:50,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:50,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:50,066 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:50,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-13 11:27:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 11:27:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:27:50,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:51,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236328931] [2022-07-13 11:27:51,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236328931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:27:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929560105] [2022-07-13 11:27:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:51,022 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 11:27:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 11:27:51,023 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 11:27:51,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-13 11:27:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:51,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:27:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:27:51,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929560105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:51,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:27:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2022-07-13 11:27:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698014119] [2022-07-13 11:27:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:27:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:27:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:27:51,296 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:51,354 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2022-07-13 11:27:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:27:51,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2022-07-13 11:27:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:51,356 INFO L225 Difference]: With dead ends: 110 [2022-07-13 11:27:51,356 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 11:27:51,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:27:51,357 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 22 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:51,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 278 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:27:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 11:27:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-07-13 11:27:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-13 11:27:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2022-07-13 11:27:51,364 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 74 [2022-07-13 11:27:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:51,364 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2022-07-13 11:27:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:27:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2022-07-13 11:27:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 11:27:51,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:51,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:51,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-07-13 11:27:51,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-13 11:27:51,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:51,767 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2022-07-13 11:27:51,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:51,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436656686] [2022-07-13 11:27:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:51,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:51,769 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:51,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-13 11:27:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:27:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:27:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:27:53,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436656686] [2022-07-13 11:27:53,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436656686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:53,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:53,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-13 11:27:53,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943698317] [2022-07-13 11:27:53,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:53,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:27:53,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:27:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:53,213 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:55,276 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-07-13 11:27:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:27:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2022-07-13 11:27:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:55,278 INFO L225 Difference]: With dead ends: 113 [2022-07-13 11:27:55,278 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 11:27:55,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:27:55,279 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 174 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 728 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:27:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 11:27:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2022-07-13 11:27:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-13 11:27:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-13 11:27:55,285 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 74 [2022-07-13 11:27:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:55,285 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-13 11:27:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-13 11:27:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 11:27:55,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:55,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:55,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-13 11:27:55,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:55,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 359389810, now seen corresponding path program 1 times [2022-07-13 11:27:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:55,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650044066] [2022-07-13 11:27:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:55,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-13 11:27:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:27:55,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:27:55,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:27:55,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650044066] [2022-07-13 11:27:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650044066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:27:55,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:27:55,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:27:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404060496] [2022-07-13 11:27:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:27:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:27:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:27:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:27:55,602 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 11:27:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:55,648 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2022-07-13 11:27:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:27:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-07-13 11:27:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:55,649 INFO L225 Difference]: With dead ends: 103 [2022-07-13 11:27:55,649 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 11:27:55,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:27:55,650 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 7 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:55,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 337 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:27:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 11:27:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-07-13 11:27:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2022-07-13 11:27:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-13 11:27:55,657 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 74 [2022-07-13 11:27:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:55,657 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-13 11:27:55,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 11:27:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-13 11:27:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 11:27:55,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:55,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:27:55,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-13 11:27:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:55,863 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2022-07-13 11:27:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:55,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288965059] [2022-07-13 11:27:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:27:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:55,871 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-13 11:27:55,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:27:55,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:27:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:27:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:27:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:27:56,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:27:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:27:57,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:27:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288965059] [2022-07-13 11:27:57,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288965059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:27:57,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:27:57,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-13 11:27:57,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830724077] [2022-07-13 11:27:57,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:27:57,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:27:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:27:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:27:57,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:27:57,327 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:27:59,494 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2022-07-13 11:27:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:27:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2022-07-13 11:27:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:27:59,496 INFO L225 Difference]: With dead ends: 115 [2022-07-13 11:27:59,497 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:27:59,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:27:59,497 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 153 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:27:59,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 740 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 11:27:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:27:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2022-07-13 11:27:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-13 11:27:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-07-13 11:27:59,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 74 [2022-07-13 11:27:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:27:59,505 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-07-13 11:27:59,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 11:27:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-07-13 11:27:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 11:27:59,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:27:59,506 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-07-13 11:27:59,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-13 11:27:59,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:27:59,711 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:27:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:27:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2022-07-13 11:27:59,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:27:59,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393080025] [2022-07-13 11:27:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:27:59,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:27:59,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:27:59,714 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:27:59,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-13 11:27:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:27:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 11:27:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 11:28:00,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:02,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393080025] [2022-07-13 11:28:02,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393080025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:02,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:02,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-13 11:28:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137877014] [2022-07-13 11:28:02,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:02,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:28:02,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:28:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:28:02,325 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:07,670 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2022-07-13 11:28:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 11:28:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2022-07-13 11:28:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:07,672 INFO L225 Difference]: With dead ends: 116 [2022-07-13 11:28:07,672 INFO L226 Difference]: Without dead ends: 105 [2022-07-13 11:28:07,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 11:28:07,673 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 133 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:07,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 924 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:28:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-13 11:28:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2022-07-13 11:28:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-13 11:28:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2022-07-13 11:28:07,682 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 81 [2022-07-13 11:28:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:07,682 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2022-07-13 11:28:07,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2022-07-13 11:28:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 11:28:07,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:07,683 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-07-13 11:28:07,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-13 11:28:07,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:07,890 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 2 times [2022-07-13 11:28:07,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:07,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716309448] [2022-07-13 11:28:07,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:07,892 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:07,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-13 11:28:07,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:07,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 11:28:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 11:28:08,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:10,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716309448] [2022-07-13 11:28:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716309448] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:10,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:10,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-13 11:28:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009930678] [2022-07-13 11:28:10,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:10,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:28:10,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:28:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:28:10,531 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:14,757 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2022-07-13 11:28:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:28:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2022-07-13 11:28:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:14,759 INFO L225 Difference]: With dead ends: 118 [2022-07-13 11:28:14,759 INFO L226 Difference]: Without dead ends: 107 [2022-07-13 11:28:14,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 11:28:14,760 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:14,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 846 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:28:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-13 11:28:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-07-13 11:28:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-13 11:28:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-07-13 11:28:14,770 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 81 [2022-07-13 11:28:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:14,770 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-07-13 11:28:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-07-13 11:28:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 11:28:14,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:14,771 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:28:14,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:14,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:14,978 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2022-07-13 11:28:14,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:14,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565718985] [2022-07-13 11:28:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:14,980 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:14,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-13 11:28:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 11:28:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 11:28:15,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:17,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565718985] [2022-07-13 11:28:17,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565718985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:17,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:17,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-13 11:28:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837190618] [2022-07-13 11:28:17,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:28:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:28:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:28:17,534 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:22,476 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2022-07-13 11:28:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:28:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 79 [2022-07-13 11:28:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:22,479 INFO L225 Difference]: With dead ends: 114 [2022-07-13 11:28:22,479 INFO L226 Difference]: Without dead ends: 105 [2022-07-13 11:28:22,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 11:28:22,480 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 156 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:22,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 822 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 11:28:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-13 11:28:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-07-13 11:28:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2022-07-13 11:28:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-07-13 11:28:22,489 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 79 [2022-07-13 11:28:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:22,489 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-07-13 11:28:22,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-07-13 11:28:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 11:28:22,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:22,491 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-07-13 11:28:22,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-13 11:28:22,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:22,697 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash -476190709, now seen corresponding path program 1 times [2022-07-13 11:28:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:22,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519441829] [2022-07-13 11:28:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:22,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:22,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:22,699 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:22,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-13 11:28:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:28:22,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:22,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:23,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519441829] [2022-07-13 11:28:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519441829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:23,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-13 11:28:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979427506] [2022-07-13 11:28:23,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:23,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:28:23,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:28:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:28:23,066 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:23,417 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2022-07-13 11:28:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:28:23,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-07-13 11:28:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:23,418 INFO L225 Difference]: With dead ends: 109 [2022-07-13 11:28:23,418 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:28:23,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:28:23,419 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 112 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:23,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 689 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:28:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:28:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-13 11:28:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (28), 16 states have call predecessors, (28), 15 states have call successors, (28) [2022-07-13 11:28:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2022-07-13 11:28:23,429 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 82 [2022-07-13 11:28:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:23,429 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2022-07-13 11:28:23,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2022-07-13 11:28:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 11:28:23,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:23,431 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:28:23,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:23,638 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2022-07-13 11:28:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196721417] [2022-07-13 11:28:23,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:23,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:23,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:23,640 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:23,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-13 11:28:23,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 11:28:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 11:28:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:26,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196721417] [2022-07-13 11:28:26,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196721417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:26,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:26,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-13 11:28:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138265449] [2022-07-13 11:28:26,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:26,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:28:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:26,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:28:26,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:28:26,227 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:31,211 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2022-07-13 11:28:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 11:28:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 79 [2022-07-13 11:28:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:31,213 INFO L225 Difference]: With dead ends: 112 [2022-07-13 11:28:31,213 INFO L226 Difference]: Without dead ends: 103 [2022-07-13 11:28:31,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 11:28:31,214 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:31,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 874 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:28:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-13 11:28:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-07-13 11:28:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (26), 16 states have call predecessors, (26), 15 states have call successors, (26) [2022-07-13 11:28:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-07-13 11:28:31,224 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 79 [2022-07-13 11:28:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-07-13 11:28:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-07-13 11:28:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 11:28:31,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:31,225 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-07-13 11:28:31,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-13 11:28:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:31,432 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 2 times [2022-07-13 11:28:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:31,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893062463] [2022-07-13 11:28:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:31,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:31,433 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:31,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-13 11:28:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:28:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:31,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:31,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893062463] [2022-07-13 11:28:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893062463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:31,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:31,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-13 11:28:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063851059] [2022-07-13 11:28:31,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:28:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:28:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:28:31,841 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:32,218 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-07-13 11:28:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:28:32,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-07-13 11:28:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:32,220 INFO L225 Difference]: With dead ends: 105 [2022-07-13 11:28:32,220 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 11:28:32,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:28:32,220 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 124 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:32,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 599 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:28:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 11:28:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-13 11:28:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 74 states have internal predecessors, (80), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-13 11:28:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-13 11:28:32,231 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 82 [2022-07-13 11:28:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:32,231 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-13 11:28:32,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-13 11:28:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 11:28:32,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:32,232 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:28:32,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:32,432 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2022-07-13 11:28:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:32,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335194768] [2022-07-13 11:28:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:32,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:32,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:32,434 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:32,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-13 11:28:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 11:28:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:28:33,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:28:38,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335194768] [2022-07-13 11:28:38,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335194768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:38,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:38,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-13 11:28:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575594261] [2022-07-13 11:28:38,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 11:28:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 11:28:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 11:28:38,783 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:28:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:54,933 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-07-13 11:28:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 11:28:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2022-07-13 11:28:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:54,936 INFO L225 Difference]: With dead ends: 104 [2022-07-13 11:28:54,936 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 11:28:54,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=380, Invalid=4042, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 11:28:54,937 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 138 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:54,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1152 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1220 Invalid, 0 Unknown, 100 Unchecked, 6.5s Time] [2022-07-13 11:28:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 11:28:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-13 11:28:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-13 11:28:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-07-13 11:28:54,947 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 84 [2022-07-13 11:28:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:54,947 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-07-13 11:28:54,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:28:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-07-13 11:28:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 11:28:54,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:54,948 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:28:54,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:55,155 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 160331167, now seen corresponding path program 1 times [2022-07-13 11:28:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705026998] [2022-07-13 11:28:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:55,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:55,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:55,157 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:55,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-13 11:28:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:28:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:28:55,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705026998] [2022-07-13 11:28:55,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705026998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:55,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:55,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-13 11:28:55,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350567146] [2022-07-13 11:28:55,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:55,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:28:55,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:28:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:28:55,545 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:55,893 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-13 11:28:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:28:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2022-07-13 11:28:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:55,895 INFO L225 Difference]: With dead ends: 110 [2022-07-13 11:28:55,895 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:28:55,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:28:55,895 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 111 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:55,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 727 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:28:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:28:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-07-13 11:28:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-13 11:28:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-07-13 11:28:55,904 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 80 [2022-07-13 11:28:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:55,905 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-07-13 11:28:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:28:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-07-13 11:28:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 11:28:55,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:55,906 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:28:55,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-13 11:28:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:56,109 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1014343994, now seen corresponding path program 2 times [2022-07-13 11:28:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:56,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027249251] [2022-07-13 11:28:56,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:56,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:56,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:56,111 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:56,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-13 11:28:56,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:56,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 11:28:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:28:57,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:29:02,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:02,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027249251] [2022-07-13 11:29:02,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027249251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:02,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:02,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-13 11:29:02,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480057581] [2022-07-13 11:29:02,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 11:29:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 11:29:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 11:29:02,758 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:29:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:23,085 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-07-13 11:29:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 11:29:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2022-07-13 11:29:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:23,089 INFO L225 Difference]: With dead ends: 102 [2022-07-13 11:29:23,089 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 11:29:23,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=356, Invalid=3426, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 11:29:23,090 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 111 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:23,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1188 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1191 Invalid, 0 Unknown, 3 Unchecked, 8.7s Time] [2022-07-13 11:29:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 11:29:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-07-13 11:29:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-13 11:29:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-07-13 11:29:23,101 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 84 [2022-07-13 11:29:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-07-13 11:29:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:29:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-07-13 11:29:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 11:29:23,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:23,102 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:29:23,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:23,310 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -411611933, now seen corresponding path program 2 times [2022-07-13 11:29:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:23,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647390972] [2022-07-13 11:29:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:29:23,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:23,311 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:23,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-13 11:29:23,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:29:23,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:29:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:29:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:29:23,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:29:23,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:23,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647390972] [2022-07-13 11:29:23,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647390972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:23,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:23,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-13 11:29:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238251591] [2022-07-13 11:29:23,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:29:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:29:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:29:23,699 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:29:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:24,031 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2022-07-13 11:29:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2022-07-13 11:29:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:24,033 INFO L225 Difference]: With dead ends: 105 [2022-07-13 11:29:24,033 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 11:29:24,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:29:24,034 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 148 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:24,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 532 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 11:29:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-07-13 11:29:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-13 11:29:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2022-07-13 11:29:24,047 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 80 [2022-07-13 11:29:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:24,047 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2022-07-13 11:29:24,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-13 11:29:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2022-07-13 11:29:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:29:24,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:24,048 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:29:24,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-13 11:29:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:24,255 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 727034220, now seen corresponding path program 1 times [2022-07-13 11:29:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207801884] [2022-07-13 11:29:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:24,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:24,256 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-13 11:29:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 11:29:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:29:25,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:29:30,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207801884] [2022-07-13 11:29:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207801884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:30,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:30,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-13 11:29:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329062554] [2022-07-13 11:29:30,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:30,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 11:29:30,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 11:29:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 11:29:30,801 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:29:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:48,144 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-07-13 11:29:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 11:29:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-13 11:29:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:48,146 INFO L225 Difference]: With dead ends: 100 [2022-07-13 11:29:48,147 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 11:29:48,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=330, Invalid=3210, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 11:29:48,148 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:48,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1229 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1056 Invalid, 0 Unknown, 46 Unchecked, 7.7s Time] [2022-07-13 11:29:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 11:29:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-07-13 11:29:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-13 11:29:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-07-13 11:29:48,163 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 86 [2022-07-13 11:29:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:48,163 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-07-13 11:29:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:29:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-07-13 11:29:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:29:48,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:48,164 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:29:48,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:48,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:48,371 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 1 times [2022-07-13 11:29:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:48,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441828240] [2022-07-13 11:29:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:48,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:48,373 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:48,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-13 11:29:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 11:29:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:29:50,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:29:57,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441828240] [2022-07-13 11:29:57,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441828240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:57,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:57,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2022-07-13 11:29:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253036580] [2022-07-13 11:29:57,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:57,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 11:29:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 11:29:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 11:29:57,551 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:05,821 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2022-07-13 11:30:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 11:30:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-13 11:30:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:05,822 INFO L225 Difference]: With dead ends: 95 [2022-07-13 11:30:05,822 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 11:30:05,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=224, Invalid=3198, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 11:30:05,823 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 63 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:05,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1549 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1359 Invalid, 0 Unknown, 92 Unchecked, 5.0s Time] [2022-07-13 11:30:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 11:30:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-07-13 11:30:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-13 11:30:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-07-13 11:30:05,838 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 86 [2022-07-13 11:30:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:05,839 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-07-13 11:30:05,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-07-13 11:30:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:30:05,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:05,840 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:30:05,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-13 11:30:06,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:06,047 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash -215268500, now seen corresponding path program 2 times [2022-07-13 11:30:06,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:06,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793134712] [2022-07-13 11:30:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:30:06,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:06,049 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:06,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-13 11:30:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:30:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:30:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 11:30:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:30:07,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:30:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:30:12,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:30:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793134712] [2022-07-13 11:30:12,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793134712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:30:12,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:30:12,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-13 11:30:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176854380] [2022-07-13 11:30:12,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:30:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 11:30:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:30:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 11:30:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 11:30:12,421 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:24,268 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-07-13 11:30:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 11:30:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-13 11:30:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:24,270 INFO L225 Difference]: With dead ends: 101 [2022-07-13 11:30:24,270 INFO L226 Difference]: Without dead ends: 77 [2022-07-13 11:30:24,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 11:30:24,272 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:24,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1130 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1050 Invalid, 0 Unknown, 4 Unchecked, 4.6s Time] [2022-07-13 11:30:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-13 11:30:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-13 11:30:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-13 11:30:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-13 11:30:24,278 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 86 [2022-07-13 11:30:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:24,278 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-13 11:30:24,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-13 11:30:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:30:24,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:24,279 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:30:24,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:24,486 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 2 times [2022-07-13 11:30:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625456282] [2022-07-13 11:30:24,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:30:24,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:24,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:24,488 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:24,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-13 11:30:24,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:30:24,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:30:24,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 11:30:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:30:25,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:30:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:30:31,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:30:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625456282] [2022-07-13 11:30:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625456282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:30:31,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:30:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2022-07-13 11:30:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641472738] [2022-07-13 11:30:31,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:30:31,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 11:30:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:30:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 11:30:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 11:30:31,675 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:36,785 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-07-13 11:30:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 11:30:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-13 11:30:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:36,786 INFO L225 Difference]: With dead ends: 84 [2022-07-13 11:30:36,786 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 11:30:36,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 11:30:36,787 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:36,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1115 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 911 Invalid, 0 Unknown, 3 Unchecked, 2.5s Time] [2022-07-13 11:30:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 11:30:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-07-13 11:30:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-13 11:30:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-13 11:30:36,793 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 86 [2022-07-13 11:30:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-13 11:30:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-13 11:30:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-13 11:30:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:30:36,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:36,794 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:30:36,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:37,001 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1052491668, now seen corresponding path program 1 times [2022-07-13 11:30:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401611541] [2022-07-13 11:30:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:37,003 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:37,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-13 11:30:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 11:30:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-13 11:30:39,115 INFO L328 TraceCheckSpWp]: Computing backward predicates...