/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:45,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:45,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:45,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:45,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:45,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:45,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:45,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:45,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:45,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:45,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:45,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:45,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:45,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:45,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:45,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:45,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:45,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:45,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:45,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:45,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:45,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:45,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:45,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:45,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:45,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:45,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:45,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:45,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:45,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:45,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:45,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:45,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:45,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:45,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:45,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:45,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:45,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:45,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:45,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:45,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:45,421 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 [2020-09-21 11:32:45,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:45,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:45,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:45,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:45,481 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:45,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:45,481 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:45,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:45,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:45,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:45,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:45,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:45,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:45,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:45,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:45,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:45,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:45,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:45,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:45,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:45,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:45,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:45,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:45,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:45,489 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:45,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:45,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:46,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:46,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:46,003 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:46,004 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-21 11:32:46,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2f7fc732/41243cda47784566adfb0daa6d77edc1/FLAG1ff1bb95c [2020-09-21 11:32:46,649 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:46,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-21 11:32:46,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2f7fc732/41243cda47784566adfb0daa6d77edc1/FLAG1ff1bb95c [2020-09-21 11:32:46,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2f7fc732/41243cda47784566adfb0daa6d77edc1 [2020-09-21 11:32:46,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:47,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:47,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:47,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:47,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:47,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:47,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47, skipping insertion in model container [2020-09-21 11:32:47,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:47,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:47,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:47,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:47,288 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:47,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:47,329 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:47,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47 WrapperNode [2020-09-21 11:32:47,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:47,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:47,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:47,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:47,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (1/1) ... [2020-09-21 11:32:47,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:47,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:47,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:47,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:47,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (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 [2020-09-21 11:32:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:47,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:47,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:47,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:47,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:47,825 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 11:32:47,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:47 BoogieIcfgContainer [2020-09-21 11:32:47,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:47,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:47,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:47,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:47,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:46" (1/3) ... [2020-09-21 11:32:47,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787efc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:47, skipping insertion in model container [2020-09-21 11:32:47,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:47" (2/3) ... [2020-09-21 11:32:47,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787efc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:47, skipping insertion in model container [2020-09-21 11:32:47,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:47" (3/3) ... [2020-09-21 11:32:47,853 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-09-21 11:32:47,888 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:47,903 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:47,922 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:47,948 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:47,949 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:47,949 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:47,949 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:47,949 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:47,950 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:47,950 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:47,950 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 11:32:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:32:47,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:47,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:47,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-09-21 11:32:47,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672058962] [2020-09-21 11:32:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,114 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,115 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,115 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,115 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:32:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,155 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,156 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,156 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,156 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672058962] [2020-09-21 11:32:48,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:48,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:48,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393756712] [2020-09-21 11:32:48,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:48,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:48,197 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-21 11:32:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,225 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-09-21 11:32:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:48,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-21 11:32:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,235 INFO L225 Difference]: With dead ends: 49 [2020-09-21 11:32:48,235 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:32:48,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:32:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 11:32:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:32:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-21 11:32:48,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-09-21 11:32:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,279 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-21 11:32:48,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-21 11:32:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:32:48,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:48,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-09-21 11:32:48,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309923332] [2020-09-21 11:32:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,324 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,325 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:32:48,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:32:48,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,406 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,406 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,407 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,407 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309923332] [2020-09-21 11:32:48,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:48,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:48,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102647818] [2020-09-21 11:32:48,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:48,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:48,418 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-09-21 11:32:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,477 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-09-21 11:32:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:48,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-21 11:32:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,479 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:32:48,479 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:32:48,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:32:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-09-21 11:32:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:32:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-21 11:32:48,489 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-09-21 11:32:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,489 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-21 11:32:48,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-21 11:32:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:48,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:48,491 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,492 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-09-21 11:32:48,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058818836] [2020-09-21 11:32:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,543 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,544 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,544 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:48,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:32:48,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:48,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,645 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,646 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,646 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058818836] [2020-09-21 11:32:48,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 11:32:48,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898068163] [2020-09-21 11:32:48,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:32:48,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:32:48,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:48,656 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-09-21 11:32:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,688 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-09-21 11:32:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:48,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 11:32:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,690 INFO L225 Difference]: With dead ends: 51 [2020-09-21 11:32:48,690 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:32:48,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:32:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-09-21 11:32:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:32:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-21 11:32:48,698 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-09-21 11:32:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,698 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-21 11:32:48,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:32:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-21 11:32:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:32:48,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:48,700 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,700 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-09-21 11:32:48,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430698228] [2020-09-21 11:32:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,737 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,738 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,738 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,738 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:32:48,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:32:48,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:48,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:48,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:48,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,846 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,846 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,846 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430698228] [2020-09-21 11:32:48,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:32:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164549495] [2020-09-21 11:32:48,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:48,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:48,861 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-09-21 11:32:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,911 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-09-21 11:32:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:48,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 11:32:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,918 INFO L225 Difference]: With dead ends: 55 [2020-09-21 11:32:48,919 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 11:32:48,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 11:32:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-09-21 11:32:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:32:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-09-21 11:32:48,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-09-21 11:32:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,927 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-09-21 11:32:48,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-09-21 11:32:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:32:48,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:48,929 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-09-21 11:32:48,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060184135] [2020-09-21 11:32:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,974 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,974 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,975 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,975 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:32:48,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:32:48,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:49,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,076 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,077 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,077 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,077 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060184135] [2020-09-21 11:32:49,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:49,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410806137] [2020-09-21 11:32:49,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:49,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:49,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:49,098 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-09-21 11:32:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,155 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-09-21 11:32:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:49,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 11:32:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,157 INFO L225 Difference]: With dead ends: 59 [2020-09-21 11:32:49,157 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:32:49,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:32:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-09-21 11:32:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:32:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 11:32:49,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-09-21 11:32:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,165 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 11:32:49,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 11:32:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:32:49,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:49,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-09-21 11:32:49,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452941307] [2020-09-21 11:32:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,246 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,246 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,246 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,246 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:32:49,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 11:32:49,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:32:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,381 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,381 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,381 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,382 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452941307] [2020-09-21 11:32:49,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:49,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137055484] [2020-09-21 11:32:49,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:49,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:49,389 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-09-21 11:32:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,455 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-09-21 11:32:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:49,455 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-21 11:32:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,456 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:32:49,457 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:32:49,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:32:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-09-21 11:32:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:32:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-21 11:32:49,464 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-09-21 11:32:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,465 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-21 11:32:49,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-21 11:32:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:32:49,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:49,467 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-09-21 11:32:49,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760001104] [2020-09-21 11:32:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,540 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,540 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,540 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:32:49,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,683 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,683 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,683 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,684 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760001104] [2020-09-21 11:32:49,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:49,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939005156] [2020-09-21 11:32:49,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:49,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:49,693 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-09-21 11:32:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,777 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-09-21 11:32:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:49,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-21 11:32:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,779 INFO L225 Difference]: With dead ends: 67 [2020-09-21 11:32:49,779 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 11:32:49,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 11:32:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-09-21 11:32:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:32:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-21 11:32:49,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-09-21 11:32:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,786 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-21 11:32:49,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-21 11:32:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:32:49,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,788 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:49,788 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-09-21 11:32:49,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016607281] [2020-09-21 11:32:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,826 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,826 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,827 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,827 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:32:49,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:32:49,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:32:49,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,963 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,964 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,964 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,964 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016607281] [2020-09-21 11:32:49,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:49,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054604126] [2020-09-21 11:32:49,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:49,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:49,972 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-09-21 11:32:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:50,075 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-09-21 11:32:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:50,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-21 11:32:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:50,076 INFO L225 Difference]: With dead ends: 71 [2020-09-21 11:32:50,077 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:32:50,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:32:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-09-21 11:32:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:32:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-21 11:32:50,084 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-09-21 11:32:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:50,084 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-21 11:32:50,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-21 11:32:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:32:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:50,085 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:50,086 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-09-21 11:32:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484246613] [2020-09-21 11:32:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,142 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,143 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,143 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:32:50,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:32:50,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:32:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:32:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:50,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,320 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,321 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,321 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:50,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:50,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484246613] [2020-09-21 11:32:50,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:50,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:32:50,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727929501] [2020-09-21 11:32:50,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:32:50,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:32:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:50,337 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-09-21 11:32:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:50,475 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-09-21 11:32:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:32:50,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 11:32:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:50,476 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:32:50,476 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 11:32:50,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 11:32:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-09-21 11:32:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:32:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-21 11:32:50,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-09-21 11:32:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:50,483 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-21 11:32:50,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:32:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-21 11:32:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:32:50,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:50,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:50,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:32:50,485 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-09-21 11:32:50,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:50,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301399884] [2020-09-21 11:32:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,525 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,525 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,525 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,526 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:32:50,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:32:50,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:32:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:32:50,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,675 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,675 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,675 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,675 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:50,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:50,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:50,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:50,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301399884] [2020-09-21 11:32:50,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:50,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:32:50,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083958392] [2020-09-21 11:32:50,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:32:50,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:32:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:50,682 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-09-21 11:32:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:50,813 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-09-21 11:32:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:32:50,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 11:32:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:50,815 INFO L225 Difference]: With dead ends: 79 [2020-09-21 11:32:50,815 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 11:32:50,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 11:32:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-09-21 11:32:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:32:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-21 11:32:50,821 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-09-21 11:32:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:50,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-21 11:32:50,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:32:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-21 11:32:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:32:50,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:50,823 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:50,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:32:50,823 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-09-21 11:32:50,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:50,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757227185] [2020-09-21 11:32:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,871 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,871 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,872 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,872 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:32:50,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:32:50,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:32:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:32:50,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,044 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,044 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,044 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:51,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757227185] [2020-09-21 11:32:51,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:51,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:32:51,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108012663] [2020-09-21 11:32:51,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:32:51,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:32:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:51,052 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-09-21 11:32:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:51,202 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-09-21 11:32:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:32:51,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-09-21 11:32:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:51,203 INFO L225 Difference]: With dead ends: 83 [2020-09-21 11:32:51,203 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:32:51,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:32:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-09-21 11:32:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:32:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-21 11:32:51,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-09-21 11:32:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:51,211 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-21 11:32:51,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:32:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-21 11:32:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:32:51,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:51,212 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:51,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:32:51,213 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-09-21 11:32:51,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:51,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787751544] [2020-09-21 11:32:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,331 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:51,331 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,331 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,331 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:32:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:51,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 11:32:51,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,704 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 13 [2020-09-21 11:32:51,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,750 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:51,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787751544] [2020-09-21 11:32:51,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:51,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:32:51,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932049901] [2020-09-21 11:32:51,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:32:51,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:32:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:51,760 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 15 states. [2020-09-21 11:32:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:52,001 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-09-21 11:32:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:32:52,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-09-21 11:32:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:52,003 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:32:52,003 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 11:32:52,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 11:32:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-09-21 11:32:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:32:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-09-21 11:32:52,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-09-21 11:32:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:52,011 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-09-21 11:32:52,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:32:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-09-21 11:32:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:32:52,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:52,013 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:52,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:32:52,013 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-09-21 11:32:52,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:52,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805113367] [2020-09-21 11:32:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,058 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:52,059 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,059 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,059 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:32:52,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:32:52,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,234 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:52,234 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,234 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,235 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:52,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:52,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:52,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805113367] [2020-09-21 11:32:52,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:52,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:32:52,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133996761] [2020-09-21 11:32:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:32:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:32:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:52,242 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-09-21 11:32:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:52,435 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-09-21 11:32:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:32:52,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 11:32:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:52,436 INFO L225 Difference]: With dead ends: 89 [2020-09-21 11:32:52,437 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:52,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:52,438 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-09-21 11:32:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:52,439 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:32:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:52,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:52,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:32:52,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:52,684 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-09-21 11:32:52,720 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:52,720 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:52,720 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:52,720 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:52,720 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:52,721 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:52,721 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-09-21 11:32:52,721 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-09-21 11:32:52,721 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-09-21 11:32:52,721 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-09-21 11:32:52,721 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-09-21 11:32:52,722 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (let ((.cse0 (div main_~v~0 4294967296))) (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= .cse0 0) (not (= main_~v~0 (let ((.cse1 (div main_~v~0 4))) (+ (* (div (+ main_~v~0 (* .cse1 (- 4))) 4294967296) 4294967296) (* .cse1 4))))) (<= 10 main_~v~0)) (and (<= main_~v~0 8) (< 0 (+ .cse0 1))))) [2020-09-21 11:32:52,722 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= (div main_~v~0 4294967296) 0) (not (= main_~v~0 (let ((.cse0 (div main_~v~0 4))) (+ (* 4294967296 (div (+ main_~v~0 (* .cse0 (- 4))) 4294967296)) (* 4 .cse0))))) (<= 10 main_~v~0)) [2020-09-21 11:32:52,722 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-09-21 11:32:52,722 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-09-21 11:32:52,723 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-09-21 11:32:52,723 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-09-21 11:32:52,723 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-09-21 11:32:52,723 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-09-21 11:32:52,723 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-09-21 11:32:52,723 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-09-21 11:32:52,723 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 11:32:52,724 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:32:52,724 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 11:32:52,724 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:32:52,724 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 11:32:52,724 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:32:52,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:52 BoogieIcfgContainer [2020-09-21 11:32:52,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:52,750 INFO L168 Benchmark]: Toolchain (without parser) took 5752.88 ms. Allocated memory was 137.4 MB in the beginning and 292.6 MB in the end (delta: 155.2 MB). Free memory was 100.6 MB in the beginning and 257.3 MB in the end (delta: -156.8 MB). Peak memory consumption was 127.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,751 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.92 ms. Allocated memory is still 137.4 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,752 INFO L168 Benchmark]: Boogie Preprocessor took 129.49 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 90.4 MB in the beginning and 177.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,753 INFO L168 Benchmark]: RCFGBuilder took 371.14 ms. Allocated memory is still 198.7 MB. Free memory was 176.7 MB in the beginning and 162.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,754 INFO L168 Benchmark]: TraceAbstraction took 4904.65 ms. Allocated memory was 198.7 MB in the beginning and 292.6 MB in the end (delta: 93.8 MB). Free memory was 161.7 MB in the beginning and 257.3 MB in the end (delta: -95.6 MB). Peak memory consumption was 127.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:52,757 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.92 ms. Allocated memory is still 137.4 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.49 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 90.4 MB in the beginning and 177.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.14 ms. Allocated memory is still 198.7 MB. Free memory was 176.7 MB in the beginning and 162.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4904.65 ms. Allocated memory was 198.7 MB in the beginning and 292.6 MB in the end (delta: 93.8 MB). Free memory was 161.7 MB in the beginning and 257.3 MB in the end (delta: -95.6 MB). Peak memory consumption was 127.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || ((v / 4294967296 <= 0 && !(v == (v + v / 4 * -4) / 4294967296 * 4294967296 + v / 4 * 4)) && 10 <= v)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 216 SDslu, 1651 SDs, 0 SdLazy, 1279 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 96 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 44 NumberOfFragments, 150 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 33605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 21/506 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...