/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:46:48,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:46:48,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:46:48,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:46:48,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:46:48,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:46:48,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:46:48,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:46:48,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:46:48,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:46:48,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:46:48,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:46:48,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:46:48,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:46:48,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:46:48,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:46:48,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:46:48,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:46:48,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:46:48,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:46:48,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:46:48,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:46:48,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:46:48,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:46:48,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:46:48,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:46:48,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:46:48,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:46:48,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:46:48,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:46:48,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:46:48,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:46:48,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:46:48,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:46:48,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:46:48,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:46:48,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:46:48,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:46:48,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:46:48,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:46:48,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:46:48,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:46:48,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:46:48,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:46:48,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:46:48,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:46:48,369 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:46:48,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:46:48,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:46:48,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:46:48,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:46:48,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:46:48,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:46:48,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:46:48,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:46:48,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:46:48,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:46:48,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:46:48,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:46:48,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:46:48,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:46:48,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:46:48,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:46:48,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:48,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:46:48,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:46:48,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:46:48,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:46:48,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:46:48,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:46:48,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:46:48,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:46:48,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:46:48,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:46:48,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:46:48,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:46:48,674 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:46:48,674 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-08-22 04:46:48,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3010b1c18/8cd89dbe6f794b3b9bbc832366132a20/FLAG6bd4bdcf8 [2020-08-22 04:46:49,137 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:46:49,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-08-22 04:46:49,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3010b1c18/8cd89dbe6f794b3b9bbc832366132a20/FLAG6bd4bdcf8 [2020-08-22 04:46:49,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3010b1c18/8cd89dbe6f794b3b9bbc832366132a20 [2020-08-22 04:46:49,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:46:49,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:46:49,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:49,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:46:49,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:46:49,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ea971c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49, skipping insertion in model container [2020-08-22 04:46:49,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:46:49,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:46:49,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:49,806 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:46:49,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:49,834 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:46:49,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49 WrapperNode [2020-08-22 04:46:49,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:49,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:46:49,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:46:49,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:46:49,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... [2020-08-22 04:46:49,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:46:49,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:46:49,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:46:49,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:46:49,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:50,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:46:50,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:46:50,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:46:50,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:46:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:46:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:46:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 04:46:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:46:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:46:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:46:50,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:46:50,190 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 04:46:50,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:50 BoogieIcfgContainer [2020-08-22 04:46:50,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:46:50,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:46:50,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:46:50,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:46:50,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:49" (1/3) ... [2020-08-22 04:46:50,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fd2749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:50, skipping insertion in model container [2020-08-22 04:46:50,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:49" (2/3) ... [2020-08-22 04:46:50,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fd2749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:50, skipping insertion in model container [2020-08-22 04:46:50,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:50" (3/3) ... [2020-08-22 04:46:50,201 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-08-22 04:46:50,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:46:50,219 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:46:50,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:46:50,257 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:46:50,258 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:46:50,258 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:46:50,258 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:46:50,258 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:46:50,258 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:46:50,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:46:50,259 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:46:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 04:46:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 04:46:50,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:50,282 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-08-22 04:46:50,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222879408] [2020-08-22 04:46:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:50,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222879408] [2020-08-22 04:46:50,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:50,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 04:46:50,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328210798] [2020-08-22 04:46:50,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 04:46:50,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 04:46:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 04:46:50,418 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-22 04:46:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,437 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 04:46:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 04:46:50,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 04:46:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,444 INFO L225 Difference]: With dead ends: 32 [2020-08-22 04:46:50,445 INFO L226 Difference]: Without dead ends: 13 [2020-08-22 04:46:50,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 04:46:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-22 04:46:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-22 04:46:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 04:46:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-22 04:46:50,481 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-22 04:46:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,482 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-22 04:46:50,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 04:46:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-22 04:46:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 04:46:50,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:50,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:46:50,483 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-08-22 04:46:50,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584570053] [2020-08-22 04:46:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:50,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584570053] [2020-08-22 04:46:50,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:50,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:50,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800055555] [2020-08-22 04:46:50,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:50,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:50,637 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-22 04:46:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,705 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-08-22 04:46:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:50,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 04:46:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,707 INFO L225 Difference]: With dead ends: 27 [2020-08-22 04:46:50,707 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 04:46:50,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 04:46:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-22 04:46:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 04:46:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-22 04:46:50,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-22 04:46:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,717 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-22 04:46:50,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-22 04:46:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:46:50,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:50,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:46:50,720 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-08-22 04:46:50,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75616608] [2020-08-22 04:46:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:50,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75616608] [2020-08-22 04:46:50,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:50,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:46:50,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597362295] [2020-08-22 04:46:50,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:50,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:50,913 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-08-22 04:46:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,989 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-22 04:46:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:50,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-22 04:46:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,991 INFO L225 Difference]: With dead ends: 30 [2020-08-22 04:46:50,992 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 04:46:50,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 04:46:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-22 04:46:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 04:46:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 04:46:50,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 04:46:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,999 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 04:46:50,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 04:46:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 04:46:51,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:51,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:51,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:46:51,001 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2020-08-22 04:46:51,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:51,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638918018] [2020-08-22 04:46:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:51,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638918018] [2020-08-22 04:46:51,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:51,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:46:51,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465542754] [2020-08-22 04:46:51,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:51,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:51,194 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 04:46:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:51,249 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-22 04:46:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:51,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-08-22 04:46:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:51,251 INFO L225 Difference]: With dead ends: 36 [2020-08-22 04:46:51,251 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 04:46:51,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 04:46:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 04:46:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 04:46:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 04:46:51,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-08-22 04:46:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:51,259 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 04:46:51,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 04:46:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:46:51,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:51,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:51,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:46:51,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2020-08-22 04:46:51,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:51,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158316755] [2020-08-22 04:46:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:51,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158316755] [2020-08-22 04:46:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:46:51,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995614249] [2020-08-22 04:46:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:46:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:46:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:51,422 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-08-22 04:46:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:51,509 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-22 04:46:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:46:51,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 04:46:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:51,510 INFO L225 Difference]: With dead ends: 42 [2020-08-22 04:46:51,511 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 04:46:51,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 04:46:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-22 04:46:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 04:46:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 04:46:51,518 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-08-22 04:46:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:51,518 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 04:46:51,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:46:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 04:46:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:46:51,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:51,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:51,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:46:51,520 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 92873718, now seen corresponding path program 4 times [2020-08-22 04:46:51,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:51,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118267092] [2020-08-22 04:46:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:51,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118267092] [2020-08-22 04:46:51,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:51,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:46:51,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063458545] [2020-08-22 04:46:51,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:46:51,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:46:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:51,663 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-08-22 04:46:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:51,748 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-22 04:46:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:46:51,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 04:46:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:51,750 INFO L225 Difference]: With dead ends: 33 [2020-08-22 04:46:51,750 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 04:46:51,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 04:46:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-22 04:46:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 04:46:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-08-22 04:46:51,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-08-22 04:46:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:51,757 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-08-22 04:46:51,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:46:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-08-22 04:46:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:46:51,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:51,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:51,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:46:51,759 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash -10230313, now seen corresponding path program 5 times [2020-08-22 04:46:51,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:51,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142431288] [2020-08-22 04:46:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:52,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:52,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142431288] [2020-08-22 04:46:52,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:52,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:46:52,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323161681] [2020-08-22 04:46:52,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:52,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:52,028 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-08-22 04:46:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:52,091 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-22 04:46:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:52,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 04:46:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:52,093 INFO L225 Difference]: With dead ends: 38 [2020-08-22 04:46:52,093 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:46:52,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:46:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:46:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:46:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:46:52,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 04:46:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:52,095 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:46:52,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:46:52,096 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:46:52,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:46:52,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:46:52,252 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:46:52,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:46:52,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:46:52,252 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:46:52,253 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:46:52,253 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:46:52,253 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-08-22 04:46:52,253 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-08-22 04:46:52,253 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-08-22 04:46:52,253 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-08-22 04:46:52,253 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-08-22 04:46:52,254 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 27) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-08-22 04:46:52,254 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-08-22 04:46:52,254 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-08-22 04:46:52,254 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 04:46:52,254 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:46:52,255 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 04:46:52,255 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 04:46:52,255 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 04:46:52,255 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:46:52,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:52 BoogieIcfgContainer [2020-08-22 04:46:52,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:46:52,282 INFO L168 Benchmark]: Toolchain (without parser) took 2751.15 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 102.1 MB in the beginning and 125.8 MB in the end (delta: -23.8 MB). Peak memory consumption was 71.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:52,288 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:46:52,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.16 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:52,291 INFO L168 Benchmark]: Boogie Preprocessor took 111.95 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 180.0 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:52,292 INFO L168 Benchmark]: RCFGBuilder took 245.40 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 167.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:52,292 INFO L168 Benchmark]: TraceAbstraction took 2083.35 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 167.2 MB in the beginning and 125.8 MB in the end (delta: 41.4 MB). Peak memory consumption was 73.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:52,305 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.16 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.95 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 180.0 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.40 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 167.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2083.35 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 167.2 MB in the beginning and 125.8 MB in the end (delta: 41.4 MB). Peak memory consumption was 73.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((4 <= len && len <= 4) || (len <= 2 && 0 < len / 4294967296 + 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 35 SDslu, 282 SDs, 0 SdLazy, 223 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 42 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 9006 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 9/75 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 correct! Received shutdown request...