./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:04:09,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:04:09,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:04:09,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:04:09,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:04:09,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:04:09,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:04:09,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:04:09,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:04:09,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:04:09,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:04:09,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:04:09,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:04:09,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:04:09,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:04:09,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:04:09,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:04:09,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:04:09,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:04:09,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:04:09,316 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:04:09,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:04:09,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:04:09,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:04:09,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:04:09,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:04:09,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:04:09,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:04:09,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:04:09,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:04:09,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:04:09,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:04:09,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:04:09,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:04:09,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:04:09,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:04:09,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:04:09,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:04:09,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:04:09,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:04:09,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:04:09,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:04:09,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:04:09,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:04:09,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:04:09,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:04:09,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:04:09,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:04:09,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:04:09,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:04:09,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:04:09,372 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:04:09,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:04:09,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:04:09,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:04:09,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:04:09,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:04:09,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:04:09,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:04:09,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:04:09,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:04:09,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:04:09,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:09,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:04:09,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:04:09,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:04:09,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:04:09,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:04:09,376 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:04:09,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:04:09,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:04:09,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-07-22 11:04:09,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:04:09,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:04:09,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:04:09,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:04:09,564 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:04:09,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-22 11:04:09,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86de2b15d/c2a0c97859b54849b39d0dd440fa65ce/FLAGba9e5b6ae [2022-07-22 11:04:10,057 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:04:10,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-22 11:04:10,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86de2b15d/c2a0c97859b54849b39d0dd440fa65ce/FLAGba9e5b6ae [2022-07-22 11:04:10,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86de2b15d/c2a0c97859b54849b39d0dd440fa65ce [2022-07-22 11:04:10,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:04:10,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:04:10,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:10,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:04:10,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:04:10,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc19eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10, skipping insertion in model container [2022-07-22 11:04:10,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:04:10,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:04:10,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-07-22 11:04:10,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:10,788 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:04:10,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-07-22 11:04:10,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:10,839 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:04:10,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10 WrapperNode [2022-07-22 11:04:10,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:10,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:10,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:04:10,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:04:10,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,879 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 213 [2022-07-22 11:04:10,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:10,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:04:10,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:04:10,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:04:10,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:04:10,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:04:10,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:04:10,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:04:10,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (1/1) ... [2022-07-22 11:04:10,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:10,955 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) [2022-07-22 11:04:10,958 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 [2022-07-22 11:04:10,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:04:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:04:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 11:04:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 11:04:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:04:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:04:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 11:04:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 11:04:11,053 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:04:11,055 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:04:11,408 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:04:11,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:04:11,424 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 11:04:11,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:11 BoogieIcfgContainer [2022-07-22 11:04:11,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:04:11,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:04:11,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:04:11,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:04:11,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:04:10" (1/3) ... [2022-07-22 11:04:11,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2438cfd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:11, skipping insertion in model container [2022-07-22 11:04:11,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:10" (2/3) ... [2022-07-22 11:04:11,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2438cfd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:11, skipping insertion in model container [2022-07-22 11:04:11,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:11" (3/3) ... [2022-07-22 11:04:11,436 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-07-22 11:04:11,448 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:04:11,448 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:04:11,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:04:11,515 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@266d65f1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f0c17aa [2022-07-22 11:04:11,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:04:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 11:04:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 11:04:11,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:11,536 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] [2022-07-22 11:04:11,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 814386124, now seen corresponding path program 1 times [2022-07-22 11:04:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475528308] [2022-07-22 11:04:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:11,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:11,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:11,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475528308] [2022-07-22 11:04:11,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475528308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:11,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:11,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171199224] [2022-07-22 11:04:11,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:11,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:11,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:11,872 INFO L87 Difference]: Start difference. First operand has 106 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 96 states have internal predecessors, (160), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:12,027 INFO L93 Difference]: Finished difference Result 276 states and 481 transitions. [2022-07-22 11:04:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-22 11:04:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:12,038 INFO L225 Difference]: With dead ends: 276 [2022-07-22 11:04:12,038 INFO L226 Difference]: Without dead ends: 165 [2022-07-22 11:04:12,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:12,044 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 110 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:12,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 419 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-22 11:04:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2022-07-22 11:04:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.5) internal successors, (198), 134 states have internal predecessors, (198), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 11:04:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 221 transitions. [2022-07-22 11:04:12,088 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 221 transitions. Word has length 37 [2022-07-22 11:04:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:12,088 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 221 transitions. [2022-07-22 11:04:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 221 transitions. [2022-07-22 11:04:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:04:12,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:12,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:04:12,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2116308935, now seen corresponding path program 1 times [2022-07-22 11:04:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:12,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781604227] [2022-07-22 11:04:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:12,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781604227] [2022-07-22 11:04:12,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781604227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:12,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:12,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893509218] [2022-07-22 11:04:12,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:12,158 INFO L87 Difference]: Start difference. First operand 147 states and 221 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:12,226 INFO L93 Difference]: Finished difference Result 275 states and 414 transitions. [2022-07-22 11:04:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-22 11:04:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:12,229 INFO L225 Difference]: With dead ends: 275 [2022-07-22 11:04:12,230 INFO L226 Difference]: Without dead ends: 236 [2022-07-22 11:04:12,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:12,231 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 102 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:12,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 436 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-22 11:04:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-07-22 11:04:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 198 states have (on average 1.4595959595959596) internal successors, (289), 201 states have internal predecessors, (289), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 11:04:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 323 transitions. [2022-07-22 11:04:12,252 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 323 transitions. Word has length 39 [2022-07-22 11:04:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:12,253 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 323 transitions. [2022-07-22 11:04:12,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 323 transitions. [2022-07-22 11:04:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 11:04:12,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:12,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:04:12,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1123536244, now seen corresponding path program 1 times [2022-07-22 11:04:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:12,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571597595] [2022-07-22 11:04:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:12,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571597595] [2022-07-22 11:04:12,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571597595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:12,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:12,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874250022] [2022-07-22 11:04:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:12,343 INFO L87 Difference]: Start difference. First operand 219 states and 323 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:12,436 INFO L93 Difference]: Finished difference Result 353 states and 525 transitions. [2022-07-22 11:04:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 11:04:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:12,439 INFO L225 Difference]: With dead ends: 353 [2022-07-22 11:04:12,439 INFO L226 Difference]: Without dead ends: 321 [2022-07-22 11:04:12,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:12,441 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 206 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:12,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 702 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-22 11:04:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-07-22 11:04:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.4615384615384615) internal successors, (361), 251 states have internal predecessors, (361), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 11:04:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 405 transitions. [2022-07-22 11:04:12,462 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 405 transitions. Word has length 40 [2022-07-22 11:04:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 405 transitions. [2022-07-22 11:04:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 405 transitions. [2022-07-22 11:04:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 11:04:12,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:12,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:04:12,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 102467890, now seen corresponding path program 1 times [2022-07-22 11:04:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:12,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075494118] [2022-07-22 11:04:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075494118] [2022-07-22 11:04:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075494118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:12,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:12,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688638543] [2022-07-22 11:04:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:12,520 INFO L87 Difference]: Start difference. First operand 273 states and 405 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:12,561 INFO L93 Difference]: Finished difference Result 294 states and 435 transitions. [2022-07-22 11:04:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 11:04:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:12,563 INFO L225 Difference]: With dead ends: 294 [2022-07-22 11:04:12,563 INFO L226 Difference]: Without dead ends: 287 [2022-07-22 11:04:12,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:12,565 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:12,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 402 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-22 11:04:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-07-22 11:04:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 252 states have internal predecessors, (362), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 11:04:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 406 transitions. [2022-07-22 11:04:12,579 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 406 transitions. Word has length 40 [2022-07-22 11:04:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:12,580 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 406 transitions. [2022-07-22 11:04:12,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 406 transitions. [2022-07-22 11:04:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 11:04:12,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:12,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:04:12,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash 991244780, now seen corresponding path program 1 times [2022-07-22 11:04:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:12,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438661625] [2022-07-22 11:04:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438661625] [2022-07-22 11:04:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438661625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903177529] [2022-07-22 11:04:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:12,756 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) [2022-07-22 11:04:12,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:04:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:04:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:04:12,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903177529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:13,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:13,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-07-22 11:04:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116052183] [2022-07-22 11:04:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 11:04:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 11:04:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:04:13,126 INFO L87 Difference]: Start difference. First operand 274 states and 406 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 11:04:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:13,783 INFO L93 Difference]: Finished difference Result 561 states and 855 transitions. [2022-07-22 11:04:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 11:04:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-07-22 11:04:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:13,786 INFO L225 Difference]: With dead ends: 561 [2022-07-22 11:04:13,786 INFO L226 Difference]: Without dead ends: 290 [2022-07-22 11:04:13,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-07-22 11:04:13,789 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 467 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:13,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1545 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:04:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-22 11:04:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-07-22 11:04:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 156 states have internal predecessors, (220), 15 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 11:04:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2022-07-22 11:04:13,815 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 41 [2022-07-22 11:04:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:13,815 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2022-07-22 11:04:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 11:04:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2022-07-22 11:04:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:04:13,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:13,821 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] [2022-07-22 11:04:13,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:14,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:14,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash 493844178, now seen corresponding path program 1 times [2022-07-22 11:04:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68802777] [2022-07-22 11:04:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68802777] [2022-07-22 11:04:14,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68802777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:14,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:14,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923360568] [2022-07-22 11:04:14,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:14,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:14,112 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:14,174 INFO L93 Difference]: Finished difference Result 205 states and 303 transitions. [2022-07-22 11:04:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-22 11:04:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:14,176 INFO L225 Difference]: With dead ends: 205 [2022-07-22 11:04:14,176 INFO L226 Difference]: Without dead ends: 179 [2022-07-22 11:04:14,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:14,178 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 174 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:14,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 576 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-22 11:04:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2022-07-22 11:04:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 147 states have internal predecessors, (206), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 11:04:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2022-07-22 11:04:14,189 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 43 [2022-07-22 11:04:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2022-07-22 11:04:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2022-07-22 11:04:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:14,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:14,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:04:14,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1964302618, now seen corresponding path program 1 times [2022-07-22 11:04:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:14,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255832884] [2022-07-22 11:04:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255832884] [2022-07-22 11:04:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255832884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:14,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564690159] [2022-07-22 11:04:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:14,251 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:14,302 INFO L93 Difference]: Finished difference Result 185 states and 268 transitions. [2022-07-22 11:04:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:14,304 INFO L225 Difference]: With dead ends: 185 [2022-07-22 11:04:14,304 INFO L226 Difference]: Without dead ends: 178 [2022-07-22 11:04:14,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:14,305 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:14,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 536 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-22 11:04:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-07-22 11:04:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 146 states have (on average 1.417808219178082) internal successors, (207), 148 states have internal predecessors, (207), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 11:04:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 238 transitions. [2022-07-22 11:04:14,313 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 238 transitions. Word has length 44 [2022-07-22 11:04:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:14,313 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 238 transitions. [2022-07-22 11:04:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 238 transitions. [2022-07-22 11:04:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:14,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:14,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:04:14,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -189295256, now seen corresponding path program 1 times [2022-07-22 11:04:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:14,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118304358] [2022-07-22 11:04:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:14,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:14,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118304358] [2022-07-22 11:04:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118304358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:14,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:14,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:04:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642865742] [2022-07-22 11:04:14,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:14,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:14,375 INFO L87 Difference]: Start difference. First operand 164 states and 238 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:14,437 INFO L93 Difference]: Finished difference Result 179 states and 258 transitions. [2022-07-22 11:04:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:14,439 INFO L225 Difference]: With dead ends: 179 [2022-07-22 11:04:14,439 INFO L226 Difference]: Without dead ends: 172 [2022-07-22 11:04:14,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:14,440 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 42 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:14,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 678 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-22 11:04:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2022-07-22 11:04:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 144 states have (on average 1.4097222222222223) internal successors, (203), 146 states have internal predecessors, (203), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 11:04:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-07-22 11:04:14,451 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-07-22 11:04:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:14,451 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-07-22 11:04:14,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-07-22 11:04:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:04:14,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:14,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:04:14,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1232722459, now seen corresponding path program 1 times [2022-07-22 11:04:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904676150] [2022-07-22 11:04:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904676150] [2022-07-22 11:04:14,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904676150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948738930] [2022-07-22 11:04:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:14,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:14,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:14,571 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) [2022-07-22 11:04:14,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:04:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:14,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:04:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:04:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:14,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948738930] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:14,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:14,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2022-07-22 11:04:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892050161] [2022-07-22 11:04:14,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:14,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:14,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:14,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:04:14,847 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:14,922 INFO L93 Difference]: Finished difference Result 392 states and 564 transitions. [2022-07-22 11:04:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 11:04:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:14,924 INFO L225 Difference]: With dead ends: 392 [2022-07-22 11:04:14,924 INFO L226 Difference]: Without dead ends: 280 [2022-07-22 11:04:14,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:14,927 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 85 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 707 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-22 11:04:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-07-22 11:04:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 250 states have (on average 1.392) internal successors, (348), 251 states have internal predecessors, (348), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-22 11:04:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 395 transitions. [2022-07-22 11:04:14,943 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 395 transitions. Word has length 45 [2022-07-22 11:04:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 395 transitions. [2022-07-22 11:04:14,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 395 transitions. [2022-07-22 11:04:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:04:14,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:14,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:14,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 11:04:15,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 11:04:15,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 221605209, now seen corresponding path program 1 times [2022-07-22 11:04:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593285042] [2022-07-22 11:04:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:15,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:15,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593285042] [2022-07-22 11:04:15,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593285042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:15,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:15,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007503936] [2022-07-22 11:04:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:15,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:15,198 INFO L87 Difference]: Start difference. First operand 276 states and 395 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:15,258 INFO L93 Difference]: Finished difference Result 422 states and 604 transitions. [2022-07-22 11:04:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 11:04:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:15,260 INFO L225 Difference]: With dead ends: 422 [2022-07-22 11:04:15,260 INFO L226 Difference]: Without dead ends: 382 [2022-07-22 11:04:15,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:15,261 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 186 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:15,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 538 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-22 11:04:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 311. [2022-07-22 11:04:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 284 states have (on average 1.3873239436619718) internal successors, (394), 284 states have internal predecessors, (394), 22 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (27), 24 states have call predecessors, (27), 21 states have call successors, (27) [2022-07-22 11:04:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 443 transitions. [2022-07-22 11:04:15,275 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 443 transitions. Word has length 45 [2022-07-22 11:04:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:15,275 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 443 transitions. [2022-07-22 11:04:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 443 transitions. [2022-07-22 11:04:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:15,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:15,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:04:15,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:15,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2044635565, now seen corresponding path program 1 times [2022-07-22 11:04:15,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:15,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906895465] [2022-07-22 11:04:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:15,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:15,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:15,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906895465] [2022-07-22 11:04:15,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906895465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069803059] [2022-07-22 11:04:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:15,411 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) [2022-07-22 11:04:15,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:04:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:04:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:15,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:15,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069803059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:15,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:15,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-22 11:04:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259612256] [2022-07-22 11:04:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:15,521 INFO L87 Difference]: Start difference. First operand 311 states and 443 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:15,669 INFO L93 Difference]: Finished difference Result 613 states and 868 transitions. [2022-07-22 11:04:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-22 11:04:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:15,673 INFO L225 Difference]: With dead ends: 613 [2022-07-22 11:04:15,673 INFO L226 Difference]: Without dead ends: 587 [2022-07-22 11:04:15,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:15,674 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 181 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:15,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 745 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-07-22 11:04:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 467. [2022-07-22 11:04:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 428 states have (on average 1.3574766355140186) internal successors, (581), 429 states have internal predecessors, (581), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2022-07-22 11:04:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 654 transitions. [2022-07-22 11:04:15,694 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 654 transitions. Word has length 48 [2022-07-22 11:04:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:15,694 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 654 transitions. [2022-07-22 11:04:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 654 transitions. [2022-07-22 11:04:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:15,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:15,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:15,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:15,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:15,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1343570987, now seen corresponding path program 1 times [2022-07-22 11:04:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93406461] [2022-07-22 11:04:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93406461] [2022-07-22 11:04:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93406461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:15,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:15,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770207300] [2022-07-22 11:04:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:15,956 INFO L87 Difference]: Start difference. First operand 467 states and 654 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:16,006 INFO L93 Difference]: Finished difference Result 491 states and 685 transitions. [2022-07-22 11:04:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-22 11:04:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:16,009 INFO L225 Difference]: With dead ends: 491 [2022-07-22 11:04:16,009 INFO L226 Difference]: Without dead ends: 451 [2022-07-22 11:04:16,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:16,009 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 38 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:16,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-22 11:04:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 443. [2022-07-22 11:04:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 404 states have (on average 1.3514851485148516) internal successors, (546), 405 states have internal predecessors, (546), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-07-22 11:04:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 618 transitions. [2022-07-22 11:04:16,028 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 618 transitions. Word has length 48 [2022-07-22 11:04:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:16,029 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 618 transitions. [2022-07-22 11:04:16,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 618 transitions. [2022-07-22 11:04:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:16,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:16,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:16,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:04:16,030 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash 502143871, now seen corresponding path program 1 times [2022-07-22 11:04:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:16,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329876404] [2022-07-22 11:04:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329876404] [2022-07-22 11:04:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329876404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:16,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681074272] [2022-07-22 11:04:16,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:16,075 INFO L87 Difference]: Start difference. First operand 443 states and 618 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:16,140 INFO L93 Difference]: Finished difference Result 840 states and 1171 transitions. [2022-07-22 11:04:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:16,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-22 11:04:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:16,143 INFO L225 Difference]: With dead ends: 840 [2022-07-22 11:04:16,143 INFO L226 Difference]: Without dead ends: 524 [2022-07-22 11:04:16,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:16,144 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 75 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:16,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 426 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-07-22 11:04:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 448. [2022-07-22 11:04:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 409 states have (on average 1.3227383863080684) internal successors, (541), 410 states have internal predecessors, (541), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (38), 35 states have call predecessors, (38), 32 states have call successors, (38) [2022-07-22 11:04:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 613 transitions. [2022-07-22 11:04:16,160 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 613 transitions. Word has length 48 [2022-07-22 11:04:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:16,161 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 613 transitions. [2022-07-22 11:04:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 613 transitions. [2022-07-22 11:04:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:16,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:16,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:16,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:04:16,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash -50490859, now seen corresponding path program 1 times [2022-07-22 11:04:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998141234] [2022-07-22 11:04:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:16,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:16,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998141234] [2022-07-22 11:04:16,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998141234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:16,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:16,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:04:16,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368361725] [2022-07-22 11:04:16,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:16,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:04:16,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:04:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:16,248 INFO L87 Difference]: Start difference. First operand 448 states and 613 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:16,493 INFO L93 Difference]: Finished difference Result 622 states and 846 transitions. [2022-07-22 11:04:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:04:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-07-22 11:04:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:16,495 INFO L225 Difference]: With dead ends: 622 [2022-07-22 11:04:16,495 INFO L226 Difference]: Without dead ends: 533 [2022-07-22 11:04:16,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:04:16,496 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 122 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:16,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1660 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-22 11:04:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 445. [2022-07-22 11:04:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 408 states have internal predecessors, (538), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (36), 34 states have call predecessors, (36), 32 states have call successors, (36) [2022-07-22 11:04:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 608 transitions. [2022-07-22 11:04:16,514 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 608 transitions. Word has length 48 [2022-07-22 11:04:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:16,514 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 608 transitions. [2022-07-22 11:04:16,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 608 transitions. [2022-07-22 11:04:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:04:16,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:16,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:16,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:04:16,516 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1297236278, now seen corresponding path program 1 times [2022-07-22 11:04:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:16,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441580447] [2022-07-22 11:04:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441580447] [2022-07-22 11:04:16,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441580447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99524837] [2022-07-22 11:04:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:16,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:16,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:16,634 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) [2022-07-22 11:04:16,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:04:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 11:04:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:16,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99524837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:16,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:16,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-07-22 11:04:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440120797] [2022-07-22 11:04:16,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:16,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:04:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:04:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:16,856 INFO L87 Difference]: Start difference. First operand 445 states and 608 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:17,413 INFO L93 Difference]: Finished difference Result 1186 states and 1619 transitions. [2022-07-22 11:04:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 11:04:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-07-22 11:04:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:17,417 INFO L225 Difference]: With dead ends: 1186 [2022-07-22 11:04:17,417 INFO L226 Difference]: Without dead ends: 808 [2022-07-22 11:04:17,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:04:17,419 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 551 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:17,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 2129 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:04:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-22 11:04:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 644. [2022-07-22 11:04:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 589 states have (on average 1.2767402376910018) internal successors, (752), 592 states have internal predecessors, (752), 49 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (56), 50 states have call predecessors, (56), 46 states have call successors, (56) [2022-07-22 11:04:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 857 transitions. [2022-07-22 11:04:17,460 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 857 transitions. Word has length 49 [2022-07-22 11:04:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:17,461 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 857 transitions. [2022-07-22 11:04:17,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 12 states have internal predecessors, (49), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 857 transitions. [2022-07-22 11:04:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:17,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:17,462 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] [2022-07-22 11:04:17,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 11:04:17,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2012462520, now seen corresponding path program 1 times [2022-07-22 11:04:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:17,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210439576] [2022-07-22 11:04:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:04:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210439576] [2022-07-22 11:04:17,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210439576] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189392972] [2022-07-22 11:04:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:17,976 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) [2022-07-22 11:04:17,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:04:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 11:04:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:18,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:18,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189392972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:18,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:18,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-07-22 11:04:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258048297] [2022-07-22 11:04:18,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:18,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:18,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:04:18,248 INFO L87 Difference]: Start difference. First operand 644 states and 857 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:18,539 INFO L93 Difference]: Finished difference Result 842 states and 1127 transitions. [2022-07-22 11:04:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-22 11:04:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:18,542 INFO L225 Difference]: With dead ends: 842 [2022-07-22 11:04:18,542 INFO L226 Difference]: Without dead ends: 823 [2022-07-22 11:04:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-22 11:04:18,543 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 284 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:18,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1167 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-22 11:04:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 673. [2022-07-22 11:04:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 616 states have (on average 1.271103896103896) internal successors, (783), 620 states have internal predecessors, (783), 51 states have call successors, (51), 3 states have call predecessors, (51), 5 states have return successors, (58), 52 states have call predecessors, (58), 48 states have call successors, (58) [2022-07-22 11:04:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 892 transitions. [2022-07-22 11:04:18,572 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 892 transitions. Word has length 50 [2022-07-22 11:04:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:18,572 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 892 transitions. [2022-07-22 11:04:18,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 892 transitions. [2022-07-22 11:04:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 11:04:18,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:18,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:18,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:18,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 11:04:18,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1388940720, now seen corresponding path program 1 times [2022-07-22 11:04:18,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:18,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352417013] [2022-07-22 11:04:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:18,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:04:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352417013] [2022-07-22 11:04:18,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352417013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:18,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:18,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:04:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728735632] [2022-07-22 11:04:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:04:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:04:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:18,835 INFO L87 Difference]: Start difference. First operand 673 states and 892 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:18,934 INFO L93 Difference]: Finished difference Result 726 states and 965 transitions. [2022-07-22 11:04:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-22 11:04:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:18,937 INFO L225 Difference]: With dead ends: 726 [2022-07-22 11:04:18,937 INFO L226 Difference]: Without dead ends: 724 [2022-07-22 11:04:18,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:18,938 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 78 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:18,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 840 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-22 11:04:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 682. [2022-07-22 11:04:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 621 states have (on average 1.2689210950080516) internal successors, (788), 628 states have internal predecessors, (788), 54 states have call successors, (54), 4 states have call predecessors, (54), 6 states have return successors, (61), 52 states have call predecessors, (61), 51 states have call successors, (61) [2022-07-22 11:04:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 903 transitions. [2022-07-22 11:04:18,970 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 903 transitions. Word has length 51 [2022-07-22 11:04:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:18,970 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 903 transitions. [2022-07-22 11:04:18,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 903 transitions. [2022-07-22 11:04:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:04:18,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:18,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:18,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:04:18,972 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1800205628, now seen corresponding path program 1 times [2022-07-22 11:04:18,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:18,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328834561] [2022-07-22 11:04:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328834561] [2022-07-22 11:04:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328834561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:19,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:19,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18398288] [2022-07-22 11:04:19,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:19,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:19,024 INFO L87 Difference]: Start difference. First operand 682 states and 903 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:19,081 INFO L93 Difference]: Finished difference Result 699 states and 926 transitions. [2022-07-22 11:04:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-22 11:04:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:19,085 INFO L225 Difference]: With dead ends: 699 [2022-07-22 11:04:19,085 INFO L226 Difference]: Without dead ends: 673 [2022-07-22 11:04:19,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:19,086 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 38 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:19,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 516 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-22 11:04:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 567. [2022-07-22 11:04:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 515 states have (on average 1.2757281553398059) internal successors, (657), 521 states have internal predecessors, (657), 45 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (52), 43 states have call predecessors, (52), 42 states have call successors, (52) [2022-07-22 11:04:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 754 transitions. [2022-07-22 11:04:19,114 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 754 transitions. Word has length 52 [2022-07-22 11:04:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:19,114 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 754 transitions. [2022-07-22 11:04:19,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 754 transitions. [2022-07-22 11:04:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:04:19,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:19,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:19,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:04:19,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2067118233, now seen corresponding path program 1 times [2022-07-22 11:04:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797797675] [2022-07-22 11:04:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 11:04:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797797675] [2022-07-22 11:04:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797797675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:19,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:04:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034793049] [2022-07-22 11:04:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:19,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:19,213 INFO L87 Difference]: Start difference. First operand 567 states and 754 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:19,469 INFO L93 Difference]: Finished difference Result 1253 states and 1690 transitions. [2022-07-22 11:04:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-22 11:04:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:19,473 INFO L225 Difference]: With dead ends: 1253 [2022-07-22 11:04:19,473 INFO L226 Difference]: Without dead ends: 1047 [2022-07-22 11:04:19,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:19,475 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 184 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:19,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1360 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-07-22 11:04:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 916. [2022-07-22 11:04:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 840 states have (on average 1.2642857142857142) internal successors, (1062), 847 states have internal predecessors, (1062), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-07-22 11:04:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1207 transitions. [2022-07-22 11:04:19,522 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1207 transitions. Word has length 57 [2022-07-22 11:04:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:19,522 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1207 transitions. [2022-07-22 11:04:19,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1207 transitions. [2022-07-22 11:04:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 11:04:19,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:19,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:04:19,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1155927203, now seen corresponding path program 1 times [2022-07-22 11:04:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:19,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029185203] [2022-07-22 11:04:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:19,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029185203] [2022-07-22 11:04:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029185203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829177586] [2022-07-22 11:04:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:19,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:19,597 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) [2022-07-22 11:04:19,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:04:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:04:19,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:19,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:19,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829177586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:19,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:19,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-22 11:04:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211219568] [2022-07-22 11:04:19,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:19,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 11:04:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 11:04:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:19,786 INFO L87 Difference]: Start difference. First operand 916 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:20,041 INFO L93 Difference]: Finished difference Result 1645 states and 2177 transitions. [2022-07-22 11:04:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:04:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-22 11:04:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:20,046 INFO L225 Difference]: With dead ends: 1645 [2022-07-22 11:04:20,046 INFO L226 Difference]: Without dead ends: 1543 [2022-07-22 11:04:20,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:20,048 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 301 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:20,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 2254 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-07-22 11:04:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 928. [2022-07-22 11:04:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 852 states have (on average 1.2629107981220657) internal successors, (1076), 859 states have internal predecessors, (1076), 69 states have call successors, (69), 4 states have call predecessors, (69), 6 states have return successors, (76), 68 states have call predecessors, (76), 66 states have call successors, (76) [2022-07-22 11:04:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1221 transitions. [2022-07-22 11:04:20,100 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1221 transitions. Word has length 58 [2022-07-22 11:04:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:20,100 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1221 transitions. [2022-07-22 11:04:20,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1221 transitions. [2022-07-22 11:04:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 11:04:20,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:20,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:20,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:20,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:20,326 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1021913697, now seen corresponding path program 1 times [2022-07-22 11:04:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950994022] [2022-07-22 11:04:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:20,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:20,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:20,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950994022] [2022-07-22 11:04:20,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950994022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:20,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60942368] [2022-07-22 11:04:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:20,396 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) [2022-07-22 11:04:20,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:04:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:20,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:20,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60942368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:20,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:20,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 11:04:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132859362] [2022-07-22 11:04:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 11:04:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 11:04:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:04:20,639 INFO L87 Difference]: Start difference. First operand 928 states and 1221 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:21,004 INFO L93 Difference]: Finished difference Result 2168 states and 2928 transitions. [2022-07-22 11:04:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 11:04:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2022-07-22 11:04:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:21,012 INFO L225 Difference]: With dead ends: 2168 [2022-07-22 11:04:21,012 INFO L226 Difference]: Without dead ends: 2046 [2022-07-22 11:04:21,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-22 11:04:21,013 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 257 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:21,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 3240 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-22 11:04:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 908. [2022-07-22 11:04:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 833 states have (on average 1.2665066026410565) internal successors, (1055), 842 states have internal predecessors, (1055), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (72), 65 states have call predecessors, (72), 65 states have call successors, (72) [2022-07-22 11:04:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1195 transitions. [2022-07-22 11:04:21,077 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1195 transitions. Word has length 58 [2022-07-22 11:04:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:21,077 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1195 transitions. [2022-07-22 11:04:21,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 13 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1195 transitions. [2022-07-22 11:04:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 11:04:21,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:21,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:21,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:21,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:21,302 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1110635549, now seen corresponding path program 1 times [2022-07-22 11:04:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:21,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045297310] [2022-07-22 11:04:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:21,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:21,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045297310] [2022-07-22 11:04:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045297310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:21,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:21,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:04:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183964890] [2022-07-22 11:04:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:21,355 INFO L87 Difference]: Start difference. First operand 908 states and 1195 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:21,498 INFO L93 Difference]: Finished difference Result 958 states and 1256 transitions. [2022-07-22 11:04:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:21,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-07-22 11:04:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:21,502 INFO L225 Difference]: With dead ends: 958 [2022-07-22 11:04:21,502 INFO L226 Difference]: Without dead ends: 752 [2022-07-22 11:04:21,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:21,504 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 44 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:21,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 869 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-22 11:04:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2022-07-22 11:04:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 679 states have (on average 1.2709867452135493) internal successors, (863), 689 states have internal predecessors, (863), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-07-22 11:04:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 981 transitions. [2022-07-22 11:04:21,539 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 981 transitions. Word has length 58 [2022-07-22 11:04:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:21,540 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 981 transitions. [2022-07-22 11:04:21,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 981 transitions. [2022-07-22 11:04:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 11:04:21,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:21,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:21,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:04:21,542 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1691045042, now seen corresponding path program 1 times [2022-07-22 11:04:21,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956947372] [2022-07-22 11:04:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 11:04:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956947372] [2022-07-22 11:04:21,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956947372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:21,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:21,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811859492] [2022-07-22 11:04:21,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:21,581 INFO L87 Difference]: Start difference. First operand 744 states and 981 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:21,681 INFO L93 Difference]: Finished difference Result 1373 states and 1824 transitions. [2022-07-22 11:04:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-22 11:04:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:21,684 INFO L225 Difference]: With dead ends: 1373 [2022-07-22 11:04:21,684 INFO L226 Difference]: Without dead ends: 764 [2022-07-22 11:04:21,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:21,685 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 55 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:21,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 355 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-22 11:04:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 745. [2022-07-22 11:04:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 680 states have (on average 1.2705882352941176) internal successors, (864), 690 states have internal predecessors, (864), 59 states have call successors, (59), 4 states have call predecessors, (59), 5 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2022-07-22 11:04:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 982 transitions. [2022-07-22 11:04:21,719 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 982 transitions. Word has length 59 [2022-07-22 11:04:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:21,719 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 982 transitions. [2022-07-22 11:04:21,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 982 transitions. [2022-07-22 11:04:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:04:21,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:21,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:04:21,720 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1304426309, now seen corresponding path program 1 times [2022-07-22 11:04:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:21,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181441405] [2022-07-22 11:04:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 11:04:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:21,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181441405] [2022-07-22 11:04:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181441405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789118390] [2022-07-22 11:04:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:21,874 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) [2022-07-22 11:04:21,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:04:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 11:04:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:04:22,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:22,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789118390] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:22,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:22,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 26 [2022-07-22 11:04:22,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990785186] [2022-07-22 11:04:22,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:22,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:22,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:04:22,662 INFO L87 Difference]: Start difference. First operand 745 states and 982 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,168 INFO L93 Difference]: Finished difference Result 1182 states and 1559 transitions. [2022-07-22 11:04:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 11:04:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-07-22 11:04:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,175 INFO L225 Difference]: With dead ends: 1182 [2022-07-22 11:04:23,175 INFO L226 Difference]: Without dead ends: 1147 [2022-07-22 11:04:23,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:04:23,177 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 242 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1707 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-22 11:04:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1000. [2022-07-22 11:04:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 912 states have (on average 1.2763157894736843) internal successors, (1164), 923 states have internal predecessors, (1164), 81 states have call successors, (81), 4 states have call predecessors, (81), 6 states have return successors, (84), 77 states have call predecessors, (84), 78 states have call successors, (84) [2022-07-22 11:04:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1329 transitions. [2022-07-22 11:04:23,236 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1329 transitions. Word has length 60 [2022-07-22 11:04:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,237 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1329 transitions. [2022-07-22 11:04:23,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1329 transitions. [2022-07-22 11:04:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:04:23,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:23,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 11:04:23,462 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -339625375, now seen corresponding path program 1 times [2022-07-22 11:04:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815820973] [2022-07-22 11:04:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 11:04:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815820973] [2022-07-22 11:04:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815820973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:23,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:23,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:04:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125693578] [2022-07-22 11:04:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:04:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:04:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:23,532 INFO L87 Difference]: Start difference. First operand 1000 states and 1329 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,645 INFO L93 Difference]: Finished difference Result 1038 states and 1377 transitions. [2022-07-22 11:04:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-22 11:04:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,653 INFO L225 Difference]: With dead ends: 1038 [2022-07-22 11:04:23,653 INFO L226 Difference]: Without dead ends: 1034 [2022-07-22 11:04:23,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:23,654 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-07-22 11:04:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 995. [2022-07-22 11:04:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 906 states have (on average 1.2759381898454747) internal successors, (1156), 919 states have internal predecessors, (1156), 81 states have call successors, (81), 5 states have call predecessors, (81), 7 states have return successors, (84), 75 states have call predecessors, (84), 78 states have call successors, (84) [2022-07-22 11:04:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1321 transitions. [2022-07-22 11:04:23,714 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1321 transitions. Word has length 62 [2022-07-22 11:04:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,714 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1321 transitions. [2022-07-22 11:04:23,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1321 transitions. [2022-07-22 11:04:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:04:23,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:04:23,716 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -282367073, now seen corresponding path program 1 times [2022-07-22 11:04:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724371378] [2022-07-22 11:04:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 11:04:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:23,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724371378] [2022-07-22 11:04:23,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724371378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:23,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:23,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:04:23,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413938893] [2022-07-22 11:04:23,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:23,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:04:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:04:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:23,763 INFO L87 Difference]: Start difference. First operand 995 states and 1321 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,871 INFO L93 Difference]: Finished difference Result 1028 states and 1362 transitions. [2022-07-22 11:04:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-22 11:04:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,875 INFO L225 Difference]: With dead ends: 1028 [2022-07-22 11:04:23,875 INFO L226 Difference]: Without dead ends: 1014 [2022-07-22 11:04:23,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:23,876 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 63 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 820 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-22 11:04:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 980. [2022-07-22 11:04:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2706935123042506) internal successors, (1136), 905 states have internal predecessors, (1136), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-22 11:04:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1294 transitions. [2022-07-22 11:04:23,928 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1294 transitions. Word has length 62 [2022-07-22 11:04:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,928 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1294 transitions. [2022-07-22 11:04:23,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1294 transitions. [2022-07-22 11:04:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:04:23,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 11:04:23,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1649289642, now seen corresponding path program 1 times [2022-07-22 11:04:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688565394] [2022-07-22 11:04:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 11:04:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688565394] [2022-07-22 11:04:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688565394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592178344] [2022-07-22 11:04:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:24,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:24,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:24,084 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) [2022-07-22 11:04:24,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 11:04:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 11:04:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:24,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592178344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:24,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-22 11:04:24,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917347829] [2022-07-22 11:04:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:24,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:24,282 INFO L87 Difference]: Start difference. First operand 980 states and 1294 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:24,476 INFO L93 Difference]: Finished difference Result 1229 states and 1635 transitions. [2022-07-22 11:04:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-07-22 11:04:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:24,481 INFO L225 Difference]: With dead ends: 1229 [2022-07-22 11:04:24,481 INFO L226 Difference]: Without dead ends: 1213 [2022-07-22 11:04:24,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:04:24,482 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 218 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:24,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 527 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-22 11:04:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 980. [2022-07-22 11:04:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 894 states have (on average 1.2684563758389262) internal successors, (1134), 905 states have internal predecessors, (1134), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-22 11:04:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1292 transitions. [2022-07-22 11:04:24,546 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1292 transitions. Word has length 62 [2022-07-22 11:04:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:24,547 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1292 transitions. [2022-07-22 11:04:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1292 transitions. [2022-07-22 11:04:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:04:24,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:24,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:24,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 11:04:24,768 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1828096048, now seen corresponding path program 1 times [2022-07-22 11:04:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839457106] [2022-07-22 11:04:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839457106] [2022-07-22 11:04:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839457106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:24,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:24,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:04:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038943349] [2022-07-22 11:04:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:04:24,833 INFO L87 Difference]: Start difference. First operand 980 states and 1292 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:25,087 INFO L93 Difference]: Finished difference Result 1643 states and 2220 transitions. [2022-07-22 11:04:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:04:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-07-22 11:04:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:25,093 INFO L225 Difference]: With dead ends: 1643 [2022-07-22 11:04:25,093 INFO L226 Difference]: Without dead ends: 1189 [2022-07-22 11:04:25,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:25,095 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 211 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:25,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1060 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-07-22 11:04:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2022-07-22 11:04:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 969 states have (on average 1.2445820433436532) internal successors, (1206), 980 states have internal predecessors, (1206), 78 states have call successors, (78), 5 states have call predecessors, (78), 7 states have return successors, (80), 74 states have call predecessors, (80), 74 states have call successors, (80) [2022-07-22 11:04:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1364 transitions. [2022-07-22 11:04:25,149 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1364 transitions. Word has length 62 [2022-07-22 11:04:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:25,149 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1364 transitions. [2022-07-22 11:04:25,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1364 transitions. [2022-07-22 11:04:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:04:25,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:25,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:25,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:04:25,152 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1826249006, now seen corresponding path program 1 times [2022-07-22 11:04:25,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:25,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771254031] [2022-07-22 11:04:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:25,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:25,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771254031] [2022-07-22 11:04:25,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771254031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:25,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 11:04:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903377979] [2022-07-22 11:04:25,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:25,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 11:04:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 11:04:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:25,354 INFO L87 Difference]: Start difference. First operand 1055 states and 1364 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:25,944 INFO L93 Difference]: Finished difference Result 1118 states and 1440 transitions. [2022-07-22 11:04:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 11:04:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-22 11:04:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:25,949 INFO L225 Difference]: With dead ends: 1118 [2022-07-22 11:04:25,949 INFO L226 Difference]: Without dead ends: 1116 [2022-07-22 11:04:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:04:25,950 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 380 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:25,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1998 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:04:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-22 11:04:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1065. [2022-07-22 11:04:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 977 states have (on average 1.2425793244626406) internal successors, (1214), 989 states have internal predecessors, (1214), 79 states have call successors, (79), 6 states have call predecessors, (79), 8 states have return successors, (81), 74 states have call predecessors, (81), 75 states have call successors, (81) [2022-07-22 11:04:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1374 transitions. [2022-07-22 11:04:26,022 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1374 transitions. Word has length 62 [2022-07-22 11:04:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:26,022 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1374 transitions. [2022-07-22 11:04:26,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1374 transitions. [2022-07-22 11:04:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:26,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:26,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:26,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:04:26,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -654456506, now seen corresponding path program 1 times [2022-07-22 11:04:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:26,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915580926] [2022-07-22 11:04:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:26,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:26,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915580926] [2022-07-22 11:04:26,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915580926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937742551] [2022-07-22 11:04:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:26,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:26,100 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) [2022-07-22 11:04:26,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 11:04:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:26,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:26,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937742551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:26,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:26,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-22 11:04:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971327436] [2022-07-22 11:04:26,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:04:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:04:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:26,271 INFO L87 Difference]: Start difference. First operand 1065 states and 1374 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:26,678 INFO L93 Difference]: Finished difference Result 3170 states and 4156 transitions. [2022-07-22 11:04:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:04:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-22 11:04:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:26,686 INFO L225 Difference]: With dead ends: 3170 [2022-07-22 11:04:26,686 INFO L226 Difference]: Without dead ends: 2732 [2022-07-22 11:04:26,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:26,688 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 286 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:26,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1824 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2022-07-22 11:04:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1170. [2022-07-22 11:04:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1080 states have (on average 1.2361111111111112) internal successors, (1335), 1090 states have internal predecessors, (1335), 80 states have call successors, (80), 6 states have call predecessors, (80), 9 states have return successors, (88), 78 states have call predecessors, (88), 76 states have call successors, (88) [2022-07-22 11:04:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1503 transitions. [2022-07-22 11:04:26,755 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1503 transitions. Word has length 65 [2022-07-22 11:04:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:26,755 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1503 transitions. [2022-07-22 11:04:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1503 transitions. [2022-07-22 11:04:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:26,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:26,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:26,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:26,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:26,981 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1951567048, now seen corresponding path program 1 times [2022-07-22 11:04:26,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:26,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311308293] [2022-07-22 11:04:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:26,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:27,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:27,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:27,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311308293] [2022-07-22 11:04:27,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311308293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667755976] [2022-07-22 11:04:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:27,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:27,045 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) [2022-07-22 11:04:27,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 11:04:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:04:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:04:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:04:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667755976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:27,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:27,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-07-22 11:04:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670758818] [2022-07-22 11:04:27,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:27,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 11:04:27,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 11:04:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:27,355 INFO L87 Difference]: Start difference. First operand 1170 states and 1503 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:28,208 INFO L93 Difference]: Finished difference Result 3318 states and 4373 transitions. [2022-07-22 11:04:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 11:04:28,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-22 11:04:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:28,217 INFO L225 Difference]: With dead ends: 3318 [2022-07-22 11:04:28,217 INFO L226 Difference]: Without dead ends: 2835 [2022-07-22 11:04:28,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 11:04:28,219 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 610 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:28,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2300 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:04:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-22 11:04:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1230. [2022-07-22 11:04:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1138 states have (on average 1.2319859402460458) internal successors, (1402), 1146 states have internal predecessors, (1402), 81 states have call successors, (81), 6 states have call predecessors, (81), 10 states have return successors, (97), 82 states have call predecessors, (97), 77 states have call successors, (97) [2022-07-22 11:04:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1580 transitions. [2022-07-22 11:04:28,289 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1580 transitions. Word has length 65 [2022-07-22 11:04:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:28,290 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1580 transitions. [2022-07-22 11:04:28,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1580 transitions. [2022-07-22 11:04:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:28,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:28,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:28,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 11:04:28,511 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash -520443000, now seen corresponding path program 1 times [2022-07-22 11:04:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158897016] [2022-07-22 11:04:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158897016] [2022-07-22 11:04:28,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158897016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321857704] [2022-07-22 11:04:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:28,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:28,589 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) [2022-07-22 11:04:28,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 11:04:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 11:04:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:28,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:28,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321857704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:28,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:28,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-22 11:04:28,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755854187] [2022-07-22 11:04:28,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:04:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:04:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:28,766 INFO L87 Difference]: Start difference. First operand 1230 states and 1580 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:29,326 INFO L93 Difference]: Finished difference Result 3599 states and 4859 transitions. [2022-07-22 11:04:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:04:29,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-22 11:04:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:29,345 INFO L225 Difference]: With dead ends: 3599 [2022-07-22 11:04:29,345 INFO L226 Difference]: Without dead ends: 3274 [2022-07-22 11:04:29,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:04:29,348 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 491 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:29,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2439 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-07-22 11:04:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1356. [2022-07-22 11:04:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1264 states have (on average 1.2231012658227849) internal successors, (1546), 1272 states have internal predecessors, (1546), 81 states have call successors, (81), 6 states have call predecessors, (81), 10 states have return successors, (97), 82 states have call predecessors, (97), 77 states have call successors, (97) [2022-07-22 11:04:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1724 transitions. [2022-07-22 11:04:29,433 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1724 transitions. Word has length 65 [2022-07-22 11:04:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:29,433 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1724 transitions. [2022-07-22 11:04:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1724 transitions. [2022-07-22 11:04:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:29,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:29,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:29,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:29,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-22 11:04:29,664 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash -915317052, now seen corresponding path program 1 times [2022-07-22 11:04:29,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:29,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961543658] [2022-07-22 11:04:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:29,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:29,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961543658] [2022-07-22 11:04:29,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961543658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:29,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975894661] [2022-07-22 11:04:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:29,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:29,732 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) [2022-07-22 11:04:29,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 11:04:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:04:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:04:29,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:04:30,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975894661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:30,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:30,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-22 11:04:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377985064] [2022-07-22 11:04:30,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:04:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:04:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:30,055 INFO L87 Difference]: Start difference. First operand 1356 states and 1724 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:31,252 INFO L93 Difference]: Finished difference Result 4186 states and 5617 transitions. [2022-07-22 11:04:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 11:04:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-22 11:04:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:31,262 INFO L225 Difference]: With dead ends: 4186 [2022-07-22 11:04:31,262 INFO L226 Difference]: Without dead ends: 3598 [2022-07-22 11:04:31,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 11:04:31,265 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 948 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:31,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 2562 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:04:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-22 11:04:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 1272. [2022-07-22 11:04:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1181 states have (on average 1.2277730736663843) internal successors, (1450), 1192 states have internal predecessors, (1450), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 78 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-22 11:04:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1621 transitions. [2022-07-22 11:04:31,373 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1621 transitions. Word has length 65 [2022-07-22 11:04:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:31,373 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1621 transitions. [2022-07-22 11:04:31,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 17 states have internal predecessors, (76), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1621 transitions. [2022-07-22 11:04:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:31,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:31,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:31,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 11:04:31,599 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1548806121, now seen corresponding path program 1 times [2022-07-22 11:04:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179972237] [2022-07-22 11:04:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:31,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:31,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179972237] [2022-07-22 11:04:31,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179972237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552728676] [2022-07-22 11:04:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:31,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:31,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:31,665 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) [2022-07-22 11:04:31,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 11:04:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:04:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 11:04:31,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:31,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552728676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:31,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:31,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 11:04:31,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312058162] [2022-07-22 11:04:31,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:31,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:31,746 INFO L87 Difference]: Start difference. First operand 1272 states and 1621 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:31,841 INFO L93 Difference]: Finished difference Result 2435 states and 3135 transitions. [2022-07-22 11:04:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-22 11:04:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:31,844 INFO L225 Difference]: With dead ends: 2435 [2022-07-22 11:04:31,844 INFO L226 Difference]: Without dead ends: 1306 [2022-07-22 11:04:31,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:31,846 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 27 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:31,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 385 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-07-22 11:04:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1281. [2022-07-22 11:04:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1190 states have (on average 1.2285714285714286) internal successors, (1462), 1201 states have internal predecessors, (1462), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 78 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-22 11:04:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1633 transitions. [2022-07-22 11:04:31,947 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1633 transitions. Word has length 65 [2022-07-22 11:04:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:31,948 INFO L495 AbstractCegarLoop]: Abstraction has 1281 states and 1633 transitions. [2022-07-22 11:04:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1633 transitions. [2022-07-22 11:04:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:31,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:31,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:31,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:32,167 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash -267248656, now seen corresponding path program 2 times [2022-07-22 11:04:32,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119335834] [2022-07-22 11:04:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:32,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119335834] [2022-07-22 11:04:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119335834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:32,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:32,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:04:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049660140] [2022-07-22 11:04:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:32,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:04:32,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:04:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:32,234 INFO L87 Difference]: Start difference. First operand 1281 states and 1633 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:32,655 INFO L93 Difference]: Finished difference Result 2456 states and 3239 transitions. [2022-07-22 11:04:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:04:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-22 11:04:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:32,659 INFO L225 Difference]: With dead ends: 2456 [2022-07-22 11:04:32,659 INFO L226 Difference]: Without dead ends: 2247 [2022-07-22 11:04:32,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:32,660 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 319 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:32,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1798 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-07-22 11:04:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1434. [2022-07-22 11:04:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1343 states have (on average 1.2204020848845867) internal successors, (1639), 1351 states have internal predecessors, (1639), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (91), 81 states have call predecessors, (91), 76 states have call successors, (91) [2022-07-22 11:04:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1810 transitions. [2022-07-22 11:04:32,735 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1810 transitions. Word has length 65 [2022-07-22 11:04:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:32,735 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1810 transitions. [2022-07-22 11:04:32,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1810 transitions. [2022-07-22 11:04:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:04:32,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:32,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:32,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 11:04:32,738 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash -662122708, now seen corresponding path program 1 times [2022-07-22 11:04:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:32,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705746337] [2022-07-22 11:04:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:32,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:32,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705746337] [2022-07-22 11:04:32,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705746337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:32,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:32,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:04:32,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944203291] [2022-07-22 11:04:32,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:32,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:32,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:32,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:32,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:04:32,804 INFO L87 Difference]: Start difference. First operand 1434 states and 1810 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:33,195 INFO L93 Difference]: Finished difference Result 2768 states and 3629 transitions. [2022-07-22 11:04:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 11:04:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-22 11:04:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:33,199 INFO L225 Difference]: With dead ends: 2768 [2022-07-22 11:04:33,199 INFO L226 Difference]: Without dead ends: 2306 [2022-07-22 11:04:33,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:04:33,200 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 312 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:33,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 942 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-07-22 11:04:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1432. [2022-07-22 11:04:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1341 states have (on average 1.2192393736017897) internal successors, (1635), 1347 states have internal predecessors, (1635), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (90), 83 states have call predecessors, (90), 76 states have call successors, (90) [2022-07-22 11:04:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1805 transitions. [2022-07-22 11:04:33,278 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1805 transitions. Word has length 65 [2022-07-22 11:04:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:33,279 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 1805 transitions. [2022-07-22 11:04:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1805 transitions. [2022-07-22 11:04:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 11:04:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:33,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 11:04:33,282 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash -560142362, now seen corresponding path program 1 times [2022-07-22 11:04:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:33,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116519383] [2022-07-22 11:04:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 11:04:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:33,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116519383] [2022-07-22 11:04:33,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116519383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:33,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913421349] [2022-07-22 11:04:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:33,311 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) [2022-07-22 11:04:33,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 11:04:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:04:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 11:04:33,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913421349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:33,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:33,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-22 11:04:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339772909] [2022-07-22 11:04:33,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:33,394 INFO L87 Difference]: Start difference. First operand 1432 states and 1805 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:33,505 INFO L93 Difference]: Finished difference Result 2428 states and 3070 transitions. [2022-07-22 11:04:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-07-22 11:04:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:33,509 INFO L225 Difference]: With dead ends: 2428 [2022-07-22 11:04:33,510 INFO L226 Difference]: Without dead ends: 1443 [2022-07-22 11:04:33,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:33,511 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 14 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:33,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 410 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-07-22 11:04:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2022-07-22 11:04:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1342 states have (on average 1.2198211624441133) internal successors, (1637), 1348 states have internal predecessors, (1637), 80 states have call successors, (80), 6 states have call predecessors, (80), 10 states have return successors, (90), 83 states have call predecessors, (90), 76 states have call successors, (90) [2022-07-22 11:04:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1807 transitions. [2022-07-22 11:04:33,590 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1807 transitions. Word has length 66 [2022-07-22 11:04:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:33,590 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1807 transitions. [2022-07-22 11:04:33,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1807 transitions. [2022-07-22 11:04:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 11:04:33,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:33,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:33,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:33,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-22 11:04:33,815 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1378433375, now seen corresponding path program 1 times [2022-07-22 11:04:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125900883] [2022-07-22 11:04:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:04:33,848 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:04:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:04:33,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 11:04:33,921 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:04:33,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:04:33,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 11:04:33,927 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:33,931 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:04:33,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:04:33 BoogieIcfgContainer [2022-07-22 11:04:33,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:04:33,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:04:33,985 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:04:33,985 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:04:33,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:11" (3/4) ... [2022-07-22 11:04:33,987 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 11:04:33,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:04:33,988 INFO L158 Benchmark]: Toolchain (without parser) took 23394.09ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 83.1MB in the beginning and 195.8MB in the end (delta: -112.7MB). Peak memory consumption was 100.6MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,988 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 75.5MB. Free memory was 46.0MB in the beginning and 45.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:04:33,988 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.75ms. Allocated memory is still 104.9MB. Free memory was 82.7MB in the beginning and 68.8MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.85ms. Allocated memory is still 104.9MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,988 INFO L158 Benchmark]: Boogie Preprocessor took 34.90ms. Allocated memory is still 104.9MB. Free memory was 66.7MB in the beginning and 64.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,989 INFO L158 Benchmark]: RCFGBuilder took 509.81ms. Allocated memory is still 104.9MB. Free memory was 64.7MB in the beginning and 45.1MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,989 INFO L158 Benchmark]: TraceAbstraction took 22556.79ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 44.8MB in the beginning and 196.8MB in the end (delta: -152.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-07-22 11:04:33,989 INFO L158 Benchmark]: Witness Printer took 2.96ms. Allocated memory is still 318.8MB. Free memory was 196.8MB in the beginning and 195.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:04:33,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 75.5MB. Free memory was 46.0MB in the beginning and 45.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.75ms. Allocated memory is still 104.9MB. Free memory was 82.7MB in the beginning and 68.8MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.85ms. Allocated memory is still 104.9MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.90ms. Allocated memory is still 104.9MB. Free memory was 66.7MB in the beginning and 64.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 509.81ms. Allocated memory is still 104.9MB. Free memory was 64.7MB in the beginning and 45.1MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 22556.79ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 44.8MB in the beginning and 196.8MB in the end (delta: -152.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 2.96ms. Allocated memory is still 318.8MB. Free memory was 196.8MB in the beginning and 195.8MB 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: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=-125, eb=127] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L80] return (__retres4); VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, \result=0, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L29] COND FALSE !(! m) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L57] COND TRUE 1 VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=16777216, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L76] m = m & ~ (1U << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=144115188075855873] [L77] res = m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L78] __retres4 = res VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L80] return (__retres4); VAL [\old(e)=-125, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=144115188075855873, \result=144115188075855871, __retres4=4294967295, e=-125, m=0, m = m & ~ (1U << 24U)=144115188075855872, res=4294967295, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=144115188075855871, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, res = m | ((unsigned int )(e + 128) << 24U)=50331648, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L59] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L64] COND TRUE e >= 127 [L65] __retres4 = 4294967295U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L80] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=144115188075855872, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=50331648, \result=4294967295, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L253] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, tmp=1, zero=0] [L263] sa = tmp VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=4294967295, b=4294967295, ea=-125, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=50331648, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L94] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L101] COND FALSE !(! b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L108] ma = a & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, m = m & ~ (1U << 24U)=144115188075855872, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L109] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L110] ma = ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L111] mb = b & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L112] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L113] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=-129, eb=127, m = m & ~ (1U << 24U)=144115188075855872, ma=3, ma = a & ((1U << 24U) - 1U)=16777215, mb=2, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] [L17] reach_error() VAL [\old(cond)=0, cond=0, m = m & ~ (1U << 24U)=144115188075855872, ma = a & ((1U << 24U) - 1U)=16777215, mb = b & ((1U << 24U) - 1U)=16777215, res = m | ((unsigned int )(e + 128) << 24U)=50331648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 106 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.4s, OverallIterations: 38, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8057 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7863 mSDsluCounter, 42220 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 35138 mSDsCounter, 955 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9268 IncrementalHoareTripleChecker+Invalid, 10223 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 955 mSolverCounterUnsat, 7082 mSDtfsCounter, 9268 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2105 GetRequests, 1621 SyntacticMatches, 15 SemanticMatches, 469 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1434occurred in iteration=35, InterpolantAutomatonStates: 362, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 37 MinimizatonAttempts, 12764 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 2922 NumberOfCodeBlocks, 2922 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 3364 ConstructedInterpolants, 0 QuantifiedInterpolants, 9323 SizeOfPredicates, 88 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 62 InterpolantComputations, 29 PerfectInterpolantSequences, 916/1054 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 11:04:34,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:04:35,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:04:35,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:04:35,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:04:35,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:04:35,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:04:35,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:04:35,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:04:35,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:04:35,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:04:35,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:04:35,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:04:35,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:04:35,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:04:35,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:04:35,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:04:35,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:04:35,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:04:35,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:04:35,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:04:35,978 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:04:35,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:04:35,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:04:35,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:04:35,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:04:35,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:04:35,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:04:35,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:04:35,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:04:35,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:04:35,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:04:35,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:04:35,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:04:35,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:04:35,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:04:35,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:04:35,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:04:35,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:04:35,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:04:35,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:04:35,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:04:35,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:04:36,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 11:04:36,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:04:36,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:04:36,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:04:36,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:04:36,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:04:36,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:04:36,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:04:36,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:04:36,026 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:04:36,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:04:36,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:04:36,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:04:36,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:04:36,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:04:36,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:04:36,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:04:36,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:04:36,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:04:36,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:04:36,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:36,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:04:36,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:04:36,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:04:36,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 11:04:36,031 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-07-22 11:04:36,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:04:36,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:04:36,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:04:36,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:04:36,370 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:04:36,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-22 11:04:36,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb884a419/37109ff95d714374be44d32a306a29fc/FLAGd2036e656 [2022-07-22 11:04:36,835 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:04:36,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-07-22 11:04:36,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb884a419/37109ff95d714374be44d32a306a29fc/FLAGd2036e656 [2022-07-22 11:04:36,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb884a419/37109ff95d714374be44d32a306a29fc [2022-07-22 11:04:36,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:04:36,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:04:36,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:36,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:04:36,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:04:36,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:36" (1/1) ... [2022-07-22 11:04:36,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce83bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:36, skipping insertion in model container [2022-07-22 11:04:36,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:36" (1/1) ... [2022-07-22 11:04:36,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:04:36,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:04:37,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-07-22 11:04:37,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:37,162 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:04:37,173 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-07-22 11:04:37,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:37,217 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:04:37,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37 WrapperNode [2022-07-22 11:04:37,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:37,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:37,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:04:37,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:04:37,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,267 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 145 [2022-07-22 11:04:37,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:37,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:04:37,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:04:37,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:04:37,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:04:37,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:04:37,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:04:37,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:04:37,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (1/1) ... [2022-07-22 11:04:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:37,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:37,348 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) [2022-07-22 11:04:37,360 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 [2022-07-22 11:04:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:04:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 11:04:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 11:04:37,399 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 11:04:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:04:37,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:04:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 11:04:37,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 11:04:37,489 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:04:37,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:04:37,752 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:04:37,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:04:37,757 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 11:04:37,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:37 BoogieIcfgContainer [2022-07-22 11:04:37,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:04:37,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:04:37,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:04:37,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:04:37,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:04:36" (1/3) ... [2022-07-22 11:04:37,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffebc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:37, skipping insertion in model container [2022-07-22 11:04:37,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:37" (2/3) ... [2022-07-22 11:04:37,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffebc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:37, skipping insertion in model container [2022-07-22 11:04:37,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:37" (3/3) ... [2022-07-22 11:04:37,768 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-07-22 11:04:37,780 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:04:37,780 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:04:37,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:04:37,841 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@244eeb6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a383e59 [2022-07-22 11:04:37,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:04:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 11:04:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 11:04:37,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:37,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:37,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2022-07-22 11:04:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658906189] [2022-07-22 11:04:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:37,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:37,874 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) [2022-07-22 11:04:37,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 11:04:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:04:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:38,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:38,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:38,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658906189] [2022-07-22 11:04:38,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658906189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:38,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-22 11:04:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986362962] [2022-07-22 11:04:38,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:38,168 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:38,303 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2022-07-22 11:04:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-07-22 11:04:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:38,315 INFO L225 Difference]: With dead ends: 194 [2022-07-22 11:04:38,316 INFO L226 Difference]: Without dead ends: 117 [2022-07-22 11:04:38,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:38,322 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 61 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:38,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 738 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-22 11:04:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2022-07-22 11:04:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 67 states have internal predecessors, (95), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-22 11:04:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 121 transitions. [2022-07-22 11:04:38,375 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 121 transitions. Word has length 32 [2022-07-22 11:04:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:38,375 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 121 transitions. [2022-07-22 11:04:38,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 121 transitions. [2022-07-22 11:04:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 11:04:38,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:38,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:38,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:38,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 861184615, now seen corresponding path program 1 times [2022-07-22 11:04:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064848336] [2022-07-22 11:04:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:38,591 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) [2022-07-22 11:04:38,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 11:04:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:04:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:38,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:38,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064848336] [2022-07-22 11:04:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064848336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:38,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:04:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862358211] [2022-07-22 11:04:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:38,700 INFO L87 Difference]: Start difference. First operand 80 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:38,781 INFO L93 Difference]: Finished difference Result 169 states and 260 transitions. [2022-07-22 11:04:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-22 11:04:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:38,784 INFO L225 Difference]: With dead ends: 169 [2022-07-22 11:04:38,784 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 11:04:38,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:38,786 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 52 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:38,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 457 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 11:04:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-07-22 11:04:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.4660194174757282) internal successors, (151), 104 states have internal predecessors, (151), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (20), 18 states have call predecessors, (20), 15 states have call successors, (20) [2022-07-22 11:04:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 187 transitions. [2022-07-22 11:04:38,800 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 187 transitions. Word has length 36 [2022-07-22 11:04:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:38,801 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 187 transitions. [2022-07-22 11:04:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 187 transitions. [2022-07-22 11:04:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 11:04:38,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:38,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:38,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:39,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1541242985, now seen corresponding path program 1 times [2022-07-22 11:04:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827422714] [2022-07-22 11:04:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:39,013 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) [2022-07-22 11:04:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 11:04:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:04:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:39,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:39,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:39,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827422714] [2022-07-22 11:04:39,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827422714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:39,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:39,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:04:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707917636] [2022-07-22 11:04:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:04:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:04:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:39,125 INFO L87 Difference]: Start difference. First operand 123 states and 187 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:39,234 INFO L93 Difference]: Finished difference Result 180 states and 274 transitions. [2022-07-22 11:04:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-22 11:04:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:39,236 INFO L225 Difference]: With dead ends: 180 [2022-07-22 11:04:39,236 INFO L226 Difference]: Without dead ends: 141 [2022-07-22 11:04:39,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:04:39,238 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:39,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-22 11:04:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2022-07-22 11:04:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.443298969072165) internal successors, (140), 98 states have internal predecessors, (140), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-22 11:04:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2022-07-22 11:04:39,249 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 36 [2022-07-22 11:04:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:39,249 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2022-07-22 11:04:39,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2022-07-22 11:04:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 11:04:39,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:39,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:39,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:39,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1860643154, now seen corresponding path program 1 times [2022-07-22 11:04:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:39,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281201124] [2022-07-22 11:04:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:39,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:39,463 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) [2022-07-22 11:04:39,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 11:04:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:04:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:39,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:39,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281201124] [2022-07-22 11:04:39,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281201124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:39,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:39,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 11:04:39,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256069256] [2022-07-22 11:04:39,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:39,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:39,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:39,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:39,640 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:39,814 INFO L93 Difference]: Finished difference Result 312 states and 476 transitions. [2022-07-22 11:04:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:04:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-07-22 11:04:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:39,816 INFO L225 Difference]: With dead ends: 312 [2022-07-22 11:04:39,817 INFO L226 Difference]: Without dead ends: 237 [2022-07-22 11:04:39,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:04:39,818 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:39,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 645 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-22 11:04:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2022-07-22 11:04:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.3870967741935485) internal successors, (215), 154 states have internal predecessors, (215), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2022-07-22 11:04:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 259 transitions. [2022-07-22 11:04:39,835 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 259 transitions. Word has length 40 [2022-07-22 11:04:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:39,836 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 259 transitions. [2022-07-22 11:04:39,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 259 transitions. [2022-07-22 11:04:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:04:39,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:39,843 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] [2022-07-22 11:04:39,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:40,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2022-07-22 11:04:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116970174] [2022-07-22 11:04:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:40,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:40,054 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) [2022-07-22 11:04:40,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 11:04:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:04:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:40,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:40,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:40,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116970174] [2022-07-22 11:04:40,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116970174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:40,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:40,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879652303] [2022-07-22 11:04:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:40,156 INFO L87 Difference]: Start difference. First operand 178 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:40,195 INFO L93 Difference]: Finished difference Result 331 states and 489 transitions. [2022-07-22 11:04:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-22 11:04:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:40,198 INFO L225 Difference]: With dead ends: 331 [2022-07-22 11:04:40,198 INFO L226 Difference]: Without dead ends: 265 [2022-07-22 11:04:40,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:40,207 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 66 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 344 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-22 11:04:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-07-22 11:04:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 207 states have (on average 1.3478260869565217) internal successors, (279), 206 states have internal predecessors, (279), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2022-07-22 11:04:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 329 transitions. [2022-07-22 11:04:40,240 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 329 transitions. Word has length 43 [2022-07-22 11:04:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,240 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 329 transitions. [2022-07-22 11:04:40,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 329 transitions. [2022-07-22 11:04:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:04:40,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:40,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:40,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1682069059, now seen corresponding path program 1 times [2022-07-22 11:04:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194902773] [2022-07-22 11:04:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:40,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:40,451 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) [2022-07-22 11:04:40,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 11:04:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:04:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 11:04:40,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:40,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:40,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194902773] [2022-07-22 11:04:40,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194902773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:40,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:40,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471115145] [2022-07-22 11:04:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:40,538 INFO L87 Difference]: Start difference. First operand 233 states and 329 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:40,592 INFO L93 Difference]: Finished difference Result 408 states and 573 transitions. [2022-07-22 11:04:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-22 11:04:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:40,595 INFO L225 Difference]: With dead ends: 408 [2022-07-22 11:04:40,595 INFO L226 Difference]: Without dead ends: 178 [2022-07-22 11:04:40,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:40,596 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-22 11:04:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-07-22 11:04:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 146 states have (on average 1.3082191780821917) internal successors, (191), 148 states have internal predecessors, (191), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 11:04:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2022-07-22 11:04:40,605 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 43 [2022-07-22 11:04:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,605 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2022-07-22 11:04:40,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:04:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2022-07-22 11:04:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:40,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:40,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:40,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash -690232792, now seen corresponding path program 1 times [2022-07-22 11:04:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:40,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810265380] [2022-07-22 11:04:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:40,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:40,818 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) [2022-07-22 11:04:40,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 11:04:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:41,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:41,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810265380] [2022-07-22 11:04:41,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810265380] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:41,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:41,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 11:04:41,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367296553] [2022-07-22 11:04:41,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:41,103 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:41,448 INFO L93 Difference]: Finished difference Result 316 states and 459 transitions. [2022-07-22 11:04:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:41,450 INFO L225 Difference]: With dead ends: 316 [2022-07-22 11:04:41,450 INFO L226 Difference]: Without dead ends: 280 [2022-07-22 11:04:41,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:41,451 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 193 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:41,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 502 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-22 11:04:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2022-07-22 11:04:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.303370786516854) internal successors, (232), 181 states have internal predecessors, (232), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-22 11:04:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 279 transitions. [2022-07-22 11:04:41,462 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 279 transitions. Word has length 44 [2022-07-22 11:04:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:41,462 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 279 transitions. [2022-07-22 11:04:41,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 279 transitions. [2022-07-22 11:04:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:41,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:41,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:41,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:41,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2022-07-22 11:04:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761157436] [2022-07-22 11:04:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:41,674 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) [2022-07-22 11:04:41,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 11:04:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:04:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:41,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:41,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:41,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761157436] [2022-07-22 11:04:41,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761157436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:41,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:41,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023073054] [2022-07-22 11:04:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:41,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:41,738 INFO L87 Difference]: Start difference. First operand 204 states and 279 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:41,770 INFO L93 Difference]: Finished difference Result 211 states and 285 transitions. [2022-07-22 11:04:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:41,773 INFO L225 Difference]: With dead ends: 211 [2022-07-22 11:04:41,773 INFO L226 Difference]: Without dead ends: 204 [2022-07-22 11:04:41,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:41,776 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:41,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 380 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-22 11:04:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-22 11:04:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.2865168539325842) internal successors, (229), 181 states have internal predecessors, (229), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-22 11:04:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 276 transitions. [2022-07-22 11:04:41,785 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 276 transitions. Word has length 44 [2022-07-22 11:04:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:41,786 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 276 transitions. [2022-07-22 11:04:41,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 276 transitions. [2022-07-22 11:04:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:41,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:41,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:41,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:41,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1077808761, now seen corresponding path program 2 times [2022-07-22 11:04:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189947920] [2022-07-22 11:04:41,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:04:41,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:41,999 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) [2022-07-22 11:04:42,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 11:04:42,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 11:04:42,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:04:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:04:42,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:42,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:42,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189947920] [2022-07-22 11:04:42,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189947920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:42,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:42,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:04:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048464879] [2022-07-22 11:04:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:42,141 INFO L87 Difference]: Start difference. First operand 204 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:42,211 INFO L93 Difference]: Finished difference Result 247 states and 337 transitions. [2022-07-22 11:04:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:42,213 INFO L225 Difference]: With dead ends: 247 [2022-07-22 11:04:42,213 INFO L226 Difference]: Without dead ends: 245 [2022-07-22 11:04:42,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:42,214 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:42,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 597 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-22 11:04:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-22 11:04:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 208. [2022-07-22 11:04:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.281767955801105) internal successors, (232), 184 states have internal predecessors, (232), 21 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-22 11:04:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 279 transitions. [2022-07-22 11:04:42,239 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 279 transitions. Word has length 44 [2022-07-22 11:04:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:42,240 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 279 transitions. [2022-07-22 11:04:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 279 transitions. [2022-07-22 11:04:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:42,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:42,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:42,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:42,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1020550459, now seen corresponding path program 1 times [2022-07-22 11:04:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:42,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175423666] [2022-07-22 11:04:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:42,457 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) [2022-07-22 11:04:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 11:04:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:04:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:42,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:04:42,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175423666] [2022-07-22 11:04:42,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175423666] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:42,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:42,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-22 11:04:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561118058] [2022-07-22 11:04:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:04:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:04:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:04:42,781 INFO L87 Difference]: Start difference. First operand 208 states and 279 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:42,937 INFO L93 Difference]: Finished difference Result 265 states and 359 transitions. [2022-07-22 11:04:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:04:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 11:04:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:42,939 INFO L225 Difference]: With dead ends: 265 [2022-07-22 11:04:42,940 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 11:04:42,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:42,941 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 84 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:42,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 508 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 11:04:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 212. [2022-07-22 11:04:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 184 states have (on average 1.2771739130434783) internal successors, (235), 187 states have internal predecessors, (235), 21 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-22 11:04:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 282 transitions. [2022-07-22 11:04:42,962 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 282 transitions. Word has length 44 [2022-07-22 11:04:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:42,963 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 282 transitions. [2022-07-22 11:04:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 282 transitions. [2022-07-22 11:04:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:04:42,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:42,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:42,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:43,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2022-07-22 11:04:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:43,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474248441] [2022-07-22 11:04:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:43,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:43,176 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) [2022-07-22 11:04:43,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 11:04:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:04:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:43,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:43,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:43,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474248441] [2022-07-22 11:04:43,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474248441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:43,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:43,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:43,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341282232] [2022-07-22 11:04:43,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:43,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:43,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:43,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:43,239 INFO L87 Difference]: Start difference. First operand 212 states and 282 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:43,277 INFO L93 Difference]: Finished difference Result 351 states and 481 transitions. [2022-07-22 11:04:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 11:04:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:43,280 INFO L225 Difference]: With dead ends: 351 [2022-07-22 11:04:43,280 INFO L226 Difference]: Without dead ends: 299 [2022-07-22 11:04:43,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:43,281 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 75 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:43,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 309 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-22 11:04:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2022-07-22 11:04:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 200 states have (on average 1.285) internal successors, (257), 202 states have internal predecessors, (257), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2022-07-22 11:04:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 310 transitions. [2022-07-22 11:04:43,307 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 310 transitions. Word has length 45 [2022-07-22 11:04:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:43,308 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 310 transitions. [2022-07-22 11:04:43,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 310 transitions. [2022-07-22 11:04:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:43,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:43,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:43,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2022-07-22 11:04:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:43,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490554907] [2022-07-22 11:04:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:43,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:43,520 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) [2022-07-22 11:04:43,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 11:04:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:04:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:43,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:43,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490554907] [2022-07-22 11:04:43,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490554907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:43,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:43,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941289822] [2022-07-22 11:04:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:43,577 INFO L87 Difference]: Start difference. First operand 231 states and 310 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:43,601 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2022-07-22 11:04:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-07-22 11:04:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:43,603 INFO L225 Difference]: With dead ends: 246 [2022-07-22 11:04:43,603 INFO L226 Difference]: Without dead ends: 207 [2022-07-22 11:04:43,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:43,604 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:43,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-22 11:04:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-07-22 11:04:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 176 states have (on average 1.3011363636363635) internal successors, (229), 179 states have internal predecessors, (229), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2022-07-22 11:04:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 280 transitions. [2022-07-22 11:04:43,619 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 280 transitions. Word has length 48 [2022-07-22 11:04:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:43,619 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 280 transitions. [2022-07-22 11:04:43,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 280 transitions. [2022-07-22 11:04:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:43,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:43,620 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] [2022-07-22 11:04:43,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,829 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1948634931, now seen corresponding path program 1 times [2022-07-22 11:04:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364253521] [2022-07-22 11:04:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:43,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:43,831 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) [2022-07-22 11:04:43,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 11:04:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:43,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:04:44,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:44,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364253521] [2022-07-22 11:04:44,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364253521] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:44,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:44,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-22 11:04:44,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353578156] [2022-07-22 11:04:44,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:44,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:44,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:44,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:44,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:04:44,037 INFO L87 Difference]: Start difference. First operand 207 states and 280 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:44,199 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2022-07-22 11:04:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:04:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-07-22 11:04:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:44,205 INFO L225 Difference]: With dead ends: 298 [2022-07-22 11:04:44,205 INFO L226 Difference]: Without dead ends: 232 [2022-07-22 11:04:44,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:44,206 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 174 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:44,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 634 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-22 11:04:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 166. [2022-07-22 11:04:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 143 states have internal predecessors, (184), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-07-22 11:04:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2022-07-22 11:04:44,217 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 50 [2022-07-22 11:04:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:44,218 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2022-07-22 11:04:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:04:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2022-07-22 11:04:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:04:44,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:44,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:44,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:44,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1060673824, now seen corresponding path program 1 times [2022-07-22 11:04:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:44,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665690949] [2022-07-22 11:04:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:44,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:44,430 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) [2022-07-22 11:04:44,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 11:04:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 11:04:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:04:44,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:44,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:44,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665690949] [2022-07-22 11:04:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665690949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:44,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:44,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486130051] [2022-07-22 11:04:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:44,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:44,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:44,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:44,497 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:44,578 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2022-07-22 11:04:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:04:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-22 11:04:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:44,579 INFO L225 Difference]: With dead ends: 241 [2022-07-22 11:04:44,579 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 11:04:44,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:44,580 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 128 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:44,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 345 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 11:04:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-07-22 11:04:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3) internal successors, (182), 143 states have internal predecessors, (182), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-07-22 11:04:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 223 transitions. [2022-07-22 11:04:44,607 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 223 transitions. Word has length 49 [2022-07-22 11:04:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:44,608 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 223 transitions. [2022-07-22 11:04:44,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 223 transitions. [2022-07-22 11:04:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:44,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:44,609 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] [2022-07-22 11:04:44,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:44,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:44,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:44,818 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2022-07-22 11:04:44,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:44,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79691176] [2022-07-22 11:04:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:44,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:44,820 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) [2022-07-22 11:04:44,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 11:04:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:04:44,864 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:04:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:04:44,921 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-22 11:04:44,922 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:04:44,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:04:44,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:45,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:45,127 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:45,129 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:04:45,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:04:45 BoogieIcfgContainer [2022-07-22 11:04:45,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:04:45,164 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:04:45,164 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:04:45,164 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:04:45,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:37" (3/4) ... [2022-07-22 11:04:45,166 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 11:04:45,210 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 11:04:45,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:04:45,211 INFO L158 Benchmark]: Toolchain (without parser) took 8344.56ms. Allocated memory was 54.5MB in the beginning and 98.6MB in the end (delta: 44.0MB). Free memory was 31.4MB in the beginning and 59.0MB in the end (delta: -27.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,211 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 54.5MB. Free memory was 36.5MB in the beginning and 36.4MB in the end (delta: 33.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:04:45,212 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.00ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.2MB in the beginning and 46.8MB in the end (delta: -15.6MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,212 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.40ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 45.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:04:45,212 INFO L158 Benchmark]: Boogie Preprocessor took 48.85ms. Allocated memory is still 67.1MB. Free memory was 45.0MB in the beginning and 43.3MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,212 INFO L158 Benchmark]: RCFGBuilder took 442.22ms. Allocated memory is still 67.1MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 1.2kB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,213 INFO L158 Benchmark]: TraceAbstraction took 7402.13ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 42.8MB in the beginning and 63.1MB in the end (delta: -20.3MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,213 INFO L158 Benchmark]: Witness Printer took 46.83ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 59.0MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 11:04:45,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 54.5MB. Free memory was 36.5MB in the beginning and 36.4MB in the end (delta: 33.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 350.00ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.2MB in the beginning and 46.8MB in the end (delta: -15.6MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.40ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 45.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.85ms. Allocated memory is still 67.1MB. Free memory was 45.0MB in the beginning and 43.3MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 442.22ms. Allocated memory is still 67.1MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 1.2kB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7402.13ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 42.8MB in the beginning and 63.1MB in the end (delta: -20.3MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Witness Printer took 46.83ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 59.0MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L253] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1236 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1204 mSDsluCounter, 6533 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 4976 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 858 IncrementalHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 1557 mSDtfsCounter, 858 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 818 GetRequests, 717 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=5, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 502 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 648 NumberOfCodeBlocks, 630 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 789 ConstructedInterpolants, 2 QuantifiedInterpolants, 1312 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1139 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 19 InterpolantComputations, 11 PerfectInterpolantSequences, 274/313 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-22 11:04:45,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE