/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:41:26,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:41:26,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:41:26,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:41:26,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:41:26,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:41:26,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:41:26,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:41:26,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:41:26,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:41:26,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:41:26,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:41:26,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:41:26,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:41:26,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:41:26,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:41:26,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:41:26,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:41:26,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:41:26,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:41:26,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:41:26,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:41:26,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:41:26,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:41:26,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:41:26,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:41:26,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:41:26,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:41:26,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:41:26,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:41:26,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:41:26,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:41:26,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:41:26,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:41:26,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:41:26,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:41:26,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:41:26,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:41:26,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:41:26,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:41:26,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:41:26,356 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 [2020-08-21 15:41:26,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:41:26,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:41:26,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:41:26,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:41:26,399 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:41:26,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:41:26,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:41:26,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:41:26,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:41:26,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:41:26,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:41:26,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:41:26,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:41:26,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:41:26,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:41:26,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:41:26,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:41:26,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:41:26,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:41:26,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:41:26,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:41:26,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:41:26,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:41:26,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:41:26,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:41:26,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:41:26,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:41:26,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:41:26,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:41:26,404 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:41:26,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:41:26,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:41:26,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:41:26,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:41:26,695 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:41:26,696 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-08-21 15:41:26,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf549aff7/8c401b4554d848a9a02ff2654b53c17b/FLAGde5bb35d1 [2020-08-21 15:41:27,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:41:27,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann04.c [2020-08-21 15:41:27,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf549aff7/8c401b4554d848a9a02ff2654b53c17b/FLAGde5bb35d1 [2020-08-21 15:41:27,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf549aff7/8c401b4554d848a9a02ff2654b53c17b [2020-08-21 15:41:27,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:41:27,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:41:27,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:41:27,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:41:27,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:41:27,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c78ef90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27, skipping insertion in model container [2020-08-21 15:41:27,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:41:27,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:41:27,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:41:27,834 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:41:27,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:41:27,868 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:41:27,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27 WrapperNode [2020-08-21 15:41:27,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:41:27,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:41:27,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:41:27,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:41:27,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (1/1) ... [2020-08-21 15:41:27,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:41:27,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:41:27,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:41:27,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:41:27,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (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 [2020-08-21 15:41:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:41:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:41:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-08-21 15:41:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:41:28,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:41:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:41:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-08-21 15:41:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:41:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:41:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:41:28,284 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:41:28,285 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:41:28,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:41:28 BoogieIcfgContainer [2020-08-21 15:41:28,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:41:28,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:41:28,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:41:28,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:41:28,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:41:27" (1/3) ... [2020-08-21 15:41:28,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1993087e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:41:28, skipping insertion in model container [2020-08-21 15:41:28,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:41:27" (2/3) ... [2020-08-21 15:41:28,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1993087e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:41:28, skipping insertion in model container [2020-08-21 15:41:28,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:41:28" (3/3) ... [2020-08-21 15:41:28,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-08-21 15:41:28,318 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:41:28,326 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:41:28,342 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:41:28,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:41:28,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:41:28,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:41:28,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:41:28,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:41:28,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:41:28,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:41:28,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:41:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 15:41:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 15:41:28,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:28,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:28,408 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-08-21 15:41:28,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:28,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136898904] [2020-08-21 15:41:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:28,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:28,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:41:28,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136898904] [2020-08-21 15:41:28,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:41:28,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:41:28,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159199707] [2020-08-21 15:41:28,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:41:28,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:41:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:41:28,661 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-21 15:41:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:28,796 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-08-21 15:41:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:41:28,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 15:41:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:28,808 INFO L225 Difference]: With dead ends: 55 [2020-08-21 15:41:28,809 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 15:41:28,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:41:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 15:41:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 15:41:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 15:41:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-08-21 15:41:28,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-08-21 15:41:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:28,871 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-08-21 15:41:28,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:41:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-08-21 15:41:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:41:28,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:28,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:28,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:41:28,877 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-08-21 15:41:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:28,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831114678] [2020-08-21 15:41:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:28,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 15:41:29,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831114678] [2020-08-21 15:41:29,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:29,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:41:29,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194968612] [2020-08-21 15:41:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:41:29,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:41:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:41:29,071 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-08-21 15:41:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:29,255 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-08-21 15:41:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:41:29,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 15:41:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:29,259 INFO L225 Difference]: With dead ends: 43 [2020-08-21 15:41:29,260 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 15:41:29,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:41:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 15:41:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 15:41:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 15:41:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2020-08-21 15:41:29,274 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 22 [2020-08-21 15:41:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:29,275 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2020-08-21 15:41:29,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:41:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2020-08-21 15:41:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:41:29,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:29,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:29,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:41:29,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-08-21 15:41:29,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:29,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971747638] [2020-08-21 15:41:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 15:41:29,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971747638] [2020-08-21 15:41:29,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:29,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 15:41:29,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127144129] [2020-08-21 15:41:29,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:41:29,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:41:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:41:29,445 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand 4 states. [2020-08-21 15:41:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:29,521 INFO L93 Difference]: Finished difference Result 74 states and 133 transitions. [2020-08-21 15:41:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:41:29,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-21 15:41:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:29,525 INFO L225 Difference]: With dead ends: 74 [2020-08-21 15:41:29,526 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 15:41:29,528 INFO L675 BasicCegarLoop]: 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 [2020-08-21 15:41:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 15:41:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 15:41:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 15:41:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 66 transitions. [2020-08-21 15:41:29,543 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 66 transitions. Word has length 29 [2020-08-21 15:41:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 66 transitions. [2020-08-21 15:41:29,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:41:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-08-21 15:41:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 15:41:29,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:29,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-08-21 15:41:29,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:41:29,547 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 1 times [2020-08-21 15:41:29,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:29,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861957442] [2020-08-21 15:41:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-21 15:41:29,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861957442] [2020-08-21 15:41:29,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:29,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:41:29,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628178105] [2020-08-21 15:41:29,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:41:29,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:41:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:41:29,700 INFO L87 Difference]: Start difference. First operand 43 states and 66 transitions. Second operand 5 states. [2020-08-21 15:41:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:29,763 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2020-08-21 15:41:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:41:29,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-08-21 15:41:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:29,766 INFO L225 Difference]: With dead ends: 47 [2020-08-21 15:41:29,766 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 15:41:29,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:41:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 15:41:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 15:41:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 15:41:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 65 transitions. [2020-08-21 15:41:29,779 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 65 transitions. Word has length 42 [2020-08-21 15:41:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:29,780 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 65 transitions. [2020-08-21 15:41:29,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:41:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 65 transitions. [2020-08-21 15:41:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 15:41:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:29,783 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:29,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:41:29,784 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 2 times [2020-08-21 15:41:29,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:29,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128632475] [2020-08-21 15:41:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:30,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:30,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-21 15:41:30,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128632475] [2020-08-21 15:41:30,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:30,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 15:41:30,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473483437] [2020-08-21 15:41:30,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 15:41:30,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 15:41:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:41:30,083 INFO L87 Difference]: Start difference. First operand 43 states and 65 transitions. Second operand 14 states. [2020-08-21 15:41:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:30,930 INFO L93 Difference]: Finished difference Result 166 states and 476 transitions. [2020-08-21 15:41:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 15:41:30,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-21 15:41:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:30,939 INFO L225 Difference]: With dead ends: 166 [2020-08-21 15:41:30,939 INFO L226 Difference]: Without dead ends: 131 [2020-08-21 15:41:30,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=990, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 15:41:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-21 15:41:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 69. [2020-08-21 15:41:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 15:41:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 133 transitions. [2020-08-21 15:41:30,979 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 133 transitions. Word has length 62 [2020-08-21 15:41:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:30,980 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 133 transitions. [2020-08-21 15:41:30,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 15:41:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 133 transitions. [2020-08-21 15:41:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-21 15:41:30,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:30,986 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:30,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:41:30,986 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -599460358, now seen corresponding path program 3 times [2020-08-21 15:41:30,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:30,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223973137] [2020-08-21 15:41:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:41:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2020-08-21 15:41:31,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223973137] [2020-08-21 15:41:31,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:31,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:41:31,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71953442] [2020-08-21 15:41:31,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:41:31,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:41:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:41:31,197 INFO L87 Difference]: Start difference. First operand 69 states and 133 transitions. Second operand 6 states. [2020-08-21 15:41:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:31,301 INFO L93 Difference]: Finished difference Result 113 states and 272 transitions. [2020-08-21 15:41:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:41:31,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-08-21 15:41:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:31,308 INFO L225 Difference]: With dead ends: 113 [2020-08-21 15:41:31,308 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 15:41:31,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:41:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 15:41:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-08-21 15:41:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 15:41:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-08-21 15:41:31,366 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 95 [2020-08-21 15:41:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:31,367 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-08-21 15:41:31,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:41:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-08-21 15:41:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-21 15:41:31,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:31,388 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 19, 12, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:31,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:41:31,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 93748169, now seen corresponding path program 4 times [2020-08-21 15:41:31,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:31,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544903912] [2020-08-21 15:41:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:41:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:41:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-21 15:41:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:31,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:41:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 349 proven. 666 refuted. 0 times theorem prover too weak. 1292 trivial. 0 not checked. [2020-08-21 15:41:32,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544903912] [2020-08-21 15:41:32,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:32,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:41:32,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479607749] [2020-08-21 15:41:32,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:41:32,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:41:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:41:32,099 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 9 states. [2020-08-21 15:41:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:32,324 INFO L93 Difference]: Finished difference Result 199 states and 592 transitions. [2020-08-21 15:41:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:41:32,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 214 [2020-08-21 15:41:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:32,329 INFO L225 Difference]: With dead ends: 199 [2020-08-21 15:41:32,330 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 15:41:32,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:41:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 15:41:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-08-21 15:41:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 15:41:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 177 transitions. [2020-08-21 15:41:32,369 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 177 transitions. Word has length 214 [2020-08-21 15:41:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:32,370 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 177 transitions. [2020-08-21 15:41:32,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:41:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 177 transitions. [2020-08-21 15:41:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 15:41:32,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:32,375 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:32,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:41:32,375 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2010206023, now seen corresponding path program 5 times [2020-08-21 15:41:32,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:32,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049297173] [2020-08-21 15:41:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 15:41:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 163 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-08-21 15:41:32,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049297173] [2020-08-21 15:41:32,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:32,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 15:41:32,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33909442] [2020-08-21 15:41:32,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 15:41:32,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 15:41:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:41:32,775 INFO L87 Difference]: Start difference. First operand 98 states and 177 transitions. Second operand 16 states. [2020-08-21 15:41:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:33,567 INFO L93 Difference]: Finished difference Result 254 states and 664 transitions. [2020-08-21 15:41:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 15:41:33,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-08-21 15:41:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:33,573 INFO L225 Difference]: With dead ends: 254 [2020-08-21 15:41:33,573 INFO L226 Difference]: Without dead ends: 164 [2020-08-21 15:41:33,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=1424, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 15:41:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-21 15:41:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 110. [2020-08-21 15:41:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 15:41:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 191 transitions. [2020-08-21 15:41:33,594 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 191 transitions. Word has length 108 [2020-08-21 15:41:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:33,595 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 191 transitions. [2020-08-21 15:41:33,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 15:41:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 191 transitions. [2020-08-21 15:41:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 15:41:33,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:33,598 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:33,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:41:33,599 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 6 times [2020-08-21 15:41:33,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:33,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375688149] [2020-08-21 15:41:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 15:41:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-08-21 15:41:33,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375688149] [2020-08-21 15:41:33,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:33,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 15:41:33,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405922682] [2020-08-21 15:41:33,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 15:41:33,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 15:41:33,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:41:33,962 INFO L87 Difference]: Start difference. First operand 110 states and 191 transitions. Second operand 16 states. [2020-08-21 15:41:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:34,968 INFO L93 Difference]: Finished difference Result 298 states and 723 transitions. [2020-08-21 15:41:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 15:41:34,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 134 [2020-08-21 15:41:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:34,974 INFO L225 Difference]: With dead ends: 298 [2020-08-21 15:41:34,974 INFO L226 Difference]: Without dead ends: 187 [2020-08-21 15:41:34,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 15:41:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-21 15:41:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2020-08-21 15:41:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 15:41:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 233 transitions. [2020-08-21 15:41:34,996 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 233 transitions. Word has length 134 [2020-08-21 15:41:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:34,997 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 233 transitions. [2020-08-21 15:41:34,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 15:41:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 233 transitions. [2020-08-21 15:41:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-21 15:41:35,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:35,000 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:35,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:41:35,000 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 7 times [2020-08-21 15:41:35,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:35,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441398995] [2020-08-21 15:41:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 15:41:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-08-21 15:41:35,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441398995] [2020-08-21 15:41:35,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:35,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 15:41:35,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722037371] [2020-08-21 15:41:35,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 15:41:35,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 15:41:35,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-08-21 15:41:35,699 INFO L87 Difference]: Start difference. First operand 132 states and 233 transitions. Second operand 22 states. [2020-08-21 15:41:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:38,056 INFO L93 Difference]: Finished difference Result 397 states and 989 transitions. [2020-08-21 15:41:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-21 15:41:38,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-08-21 15:41:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:38,075 INFO L225 Difference]: With dead ends: 397 [2020-08-21 15:41:38,075 INFO L226 Difference]: Without dead ends: 273 [2020-08-21 15:41:38,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1232, Invalid=6078, Unknown=0, NotChecked=0, Total=7310 [2020-08-21 15:41:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-21 15:41:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 167. [2020-08-21 15:41:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-21 15:41:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 326 transitions. [2020-08-21 15:41:38,134 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 326 transitions. Word has length 160 [2020-08-21 15:41:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:38,135 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 326 transitions. [2020-08-21 15:41:38,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 15:41:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 326 transitions. [2020-08-21 15:41:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-21 15:41:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:38,140 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:38,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:41:38,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-08-21 15:41:38,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:38,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827254815] [2020-08-21 15:41:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 15:41:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 15:41:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-08-21 15:41:38,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827254815] [2020-08-21 15:41:38,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:38,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 15:41:38,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871553048] [2020-08-21 15:41:38,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 15:41:38,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 15:41:38,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-08-21 15:41:38,805 INFO L87 Difference]: Start difference. First operand 167 states and 326 transitions. Second operand 23 states. [2020-08-21 15:41:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:41,226 INFO L93 Difference]: Finished difference Result 464 states and 1249 transitions. [2020-08-21 15:41:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-08-21 15:41:41,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2020-08-21 15:41:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:41,238 INFO L225 Difference]: With dead ends: 464 [2020-08-21 15:41:41,238 INFO L226 Difference]: Without dead ends: 305 [2020-08-21 15:41:41,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1399, Invalid=6973, Unknown=0, NotChecked=0, Total=8372 [2020-08-21 15:41:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-21 15:41:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 199. [2020-08-21 15:41:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-21 15:41:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 415 transitions. [2020-08-21 15:41:41,289 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 415 transitions. Word has length 173 [2020-08-21 15:41:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:41,290 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 415 transitions. [2020-08-21 15:41:41,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 15:41:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 415 transitions. [2020-08-21 15:41:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-21 15:41:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:41:41,296 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:41:41,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:41:41,296 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:41:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:41:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 9 times [2020-08-21 15:41:41,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:41:41,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188801625] [2020-08-21 15:41:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:41:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:41:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:41:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 15:41:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 15:41:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:41:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:41:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:41:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:41:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 15:41:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 15:41:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:41:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-08-21 15:41:42,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188801625] [2020-08-21 15:41:42,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:41:42,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 15:41:42,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632037550] [2020-08-21 15:41:42,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 15:41:42,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:41:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 15:41:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-08-21 15:41:42,042 INFO L87 Difference]: Start difference. First operand 199 states and 415 transitions. Second operand 25 states. [2020-08-21 15:41:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:41:43,582 INFO L93 Difference]: Finished difference Result 342 states and 714 transitions. [2020-08-21 15:41:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-21 15:41:43,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2020-08-21 15:41:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:41:43,588 INFO L225 Difference]: With dead ends: 342 [2020-08-21 15:41:43,588 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:41:43,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=869, Invalid=3687, Unknown=0, NotChecked=0, Total=4556 [2020-08-21 15:41:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:41:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:41:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:41:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:41:43,597 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-08-21 15:41:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:41:43,597 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:41:43,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 15:41:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:41:43,598 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:41:43,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:41:43,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:41:43,990 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-08-21 15:41:44,121 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-08-21 15:41:44,426 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-08-21 15:41:45,979 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 86 [2020-08-21 15:41:46,098 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 86 [2020-08-21 15:41:46,863 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 77 [2020-08-21 15:41:48,834 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 104 [2020-08-21 15:41:49,177 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 10 [2020-08-21 15:41:51,732 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 342 DAG size of output: 47 [2020-08-21 15:41:51,900 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 11 [2020-08-21 15:41:51,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 15:41:51,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:41:51,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:41:51,946 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 15:41:51,946 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:41:51,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:41:51,946 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-08-21 15:41:51,947 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-08-21 15:41:51,947 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-21 15:41:51,947 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-08-21 15:41:51,948 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-08-21 15:41:51,949 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse7 (<= |ackermann_#in~n| 1)) (.cse1 (<= 4 |ackermann_#t~ret1|)) (.cse5 (<= |ackermann_#in~n| 2)) (.cse6 (<= 6 |ackermann_#t~ret1|)) (.cse0 (not (= ackermann_~m 0))) (.cse8 (<= 5 |ackermann_#t~ret1|)) (.cse2 (<= ackermann_~m 1)) (.cse4 (<= 3 |ackermann_#t~ret1|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (and (or (= |ackermann_#in~n| 1) (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5) .cse6 (and (<= 2 |ackermann_#res|) .cse7)) (or .cse7 (<= |ackermann_#in~m| 1) (and .cse8 (<= |ackermann_#in~m| 2)) .cse6) (let ((.cse9 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= |ackermann_#in~n| 3) .cse0 .cse1 .cse2 .cse9 .cse3) (and .cse0 .cse5 .cse9) (and .cse6 .cse0 .cse9) (and .cse0 .cse8 .cse9 (<= |ackermann_#in~n| 4)))) (or (and (<= 2 |ackermann_#t~ret1|) .cse2 .cse3) (and .cse4 .cse3)))) [2020-08-21 15:41:51,949 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-21 15:41:51,949 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-08-21 15:41:51,949 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-08-21 15:41:51,950 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-21 15:41:51,950 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-08-21 15:41:51,950 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-08-21 15:41:51,950 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-08-21 15:41:51,950 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-08-21 15:41:51,950 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-08-21 15:41:51,951 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-08-21 15:41:51,951 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-08-21 15:41:51,951 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-08-21 15:41:51,951 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-08-21 15:41:51,951 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-08-21 15:41:51,951 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-08-21 15:41:51,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:41:51 BoogieIcfgContainer [2020-08-21 15:41:51,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:41:51,967 INFO L168 Benchmark]: Toolchain (without parser) took 24335.77 ms. Allocated memory was 141.0 MB in the beginning and 579.9 MB in the end (delta: 438.8 MB). Free memory was 104.2 MB in the beginning and 440.5 MB in the end (delta: -336.3 MB). Peak memory consumption was 455.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,968 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.72 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,969 INFO L168 Benchmark]: Boogie Preprocessor took 121.09 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.1 MB in the beginning and 182.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,978 INFO L168 Benchmark]: RCFGBuilder took 299.99 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 169.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,980 INFO L168 Benchmark]: TraceAbstraction took 23665.07 ms. Allocated memory was 204.5 MB in the beginning and 579.9 MB in the end (delta: 375.4 MB). Free memory was 169.6 MB in the beginning and 440.5 MB in the end (delta: -270.9 MB). Peak memory consumption was 457.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:41:51,987 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.72 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.09 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.1 MB in the beginning and 182.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.99 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 169.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23665.07 ms. Allocated memory was 204.5 MB in the beginning and 579.9 MB in the end (delta: 375.4 MB). Free memory was 169.6 MB in the beginning and 440.5 MB in the end (delta: -270.9 MB). Peak memory consumption was 457.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.2s, OverallIterations: 12, TraceHistogramMax: 31, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 327 SDtfs, 288 SDslu, 1318 SDs, 0 SdLazy, 4278 SolverSat, 1203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 816 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6208 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=11, 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, 12 MinimizatonAttempts, 383 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 825 PreInvPairs, 2911 NumberOfFragments, 159 HoareAnnotationTreeSize, 825 FomulaSimplifications, 2616823 FormulaSimplificationTreeSizeReduction, 5.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 62963 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1240 NumberOfCodeBlocks, 1240 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1228 ConstructedInterpolants, 0 QuantifiedInterpolants, 315418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 6785/8692 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...