/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:55:57,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:55:57,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:55:57,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:55:57,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:55:57,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:55:57,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:55:57,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:55:57,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:55:57,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:55:57,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:55:57,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:55:57,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:55:57,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:55:57,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:55:57,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:55:57,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:55:57,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:55:57,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:55:57,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:55:57,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:55:57,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:55:57,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:55:57,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:55:57,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:55:57,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:55:57,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:55:57,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:55:57,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:55:57,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:55:57,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:55:57,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:55:57,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:55:57,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:55:57,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:55:57,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:55:57,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:55:57,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:55:57,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:55:57,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:55:57,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:55:57,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:55:57,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:55:57,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:55:57,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:55:57,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:55:57,520 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:55:57,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:55:57,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:55:57,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:55:57,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:55:57,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:55:57,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:55:57,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:55:57,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:55:57,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:55:57,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:55:57,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:55:57,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:55:57,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:55:57,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:55:57,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:55:57,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:55:57,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:55:57,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:55:57,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:55:57,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:55:57,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:55:57,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:55:57,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:55:57,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:55:57,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:55:57,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:55:57,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:55:57,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:55:57,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:55:57,850 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:55:57,851 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-08-21 23:55:57,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcfdbdfbd/979e6ea7f74546338753edf14aad05bf/FLAGcacfa8248 [2020-08-21 23:55:58,310 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:55:58,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/half.i [2020-08-21 23:55:58,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcfdbdfbd/979e6ea7f74546338753edf14aad05bf/FLAGcacfa8248 [2020-08-21 23:55:58,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcfdbdfbd/979e6ea7f74546338753edf14aad05bf [2020-08-21 23:55:58,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:55:58,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:55:58,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:58,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:55:58,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:55:58,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe964b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58, skipping insertion in model container [2020-08-21 23:55:58,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:55:58,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:55:58,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:58,914 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:55:58,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:58,945 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:55:58,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58 WrapperNode [2020-08-21 23:55:58,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:58,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:55:58,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:55:58,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:55:58,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... [2020-08-21 23:55:58,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:55:58,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:55:58,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:55:58,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:55:58,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:55:59,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:55:59,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:55:59,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 23:55:59,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:55:59,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:55:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:55:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 23:55:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 23:55:59,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:55:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:55:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:55:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:55:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:55:59,520 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:55:59,520 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:55:59,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:59 BoogieIcfgContainer [2020-08-21 23:55:59,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:55:59,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:55:59,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:55:59,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:55:59,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:55:58" (1/3) ... [2020-08-21 23:55:59,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893631c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:59, skipping insertion in model container [2020-08-21 23:55:59,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:58" (2/3) ... [2020-08-21 23:55:59,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893631c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:59, skipping insertion in model container [2020-08-21 23:55:59,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:59" (3/3) ... [2020-08-21 23:55:59,536 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-08-21 23:55:59,546 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:55:59,554 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:55:59,564 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:55:59,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:55:59,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:55:59,584 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:55:59,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:55:59,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:55:59,584 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:55:59,584 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:55:59,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:55:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 23:55:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 23:55:59,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:59,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:59,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-08-21 23:55:59,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:59,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357558010] [2020-08-21 23:55:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:59,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357558010] [2020-08-21 23:55:59,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:59,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 23:55:59,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042340447] [2020-08-21 23:55:59,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 23:55:59,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 23:55:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 23:55:59,769 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-08-21 23:55:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:59,791 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-21 23:55:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 23:55:59,792 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-21 23:55:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:59,800 INFO L225 Difference]: With dead ends: 33 [2020-08-21 23:55:59,800 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 23:55:59,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 23:55:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 23:55:59,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 23:55:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 23:55:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 23:55:59,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-08-21 23:55:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 23:55:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 23:55:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 23:55:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 23:55:59,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:59,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:55:59,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:55:59,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-08-21 23:55:59,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:59,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406739472] [2020-08-21 23:55:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:00,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406739472] [2020-08-21 23:56:00,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:56:00,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:56:00,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677618757] [2020-08-21 23:56:00,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:56:00,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:56:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:56:00,062 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-08-21 23:56:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:56:00,268 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-08-21 23:56:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 23:56:00,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-08-21 23:56:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:56:00,276 INFO L225 Difference]: With dead ends: 26 [2020-08-21 23:56:00,276 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 23:56:00,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:56:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 23:56:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-08-21 23:56:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 23:56:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-21 23:56:00,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-08-21 23:56:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:56:00,295 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-21 23:56:00,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:56:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-21 23:56:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 23:56:00,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:00,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:56:00,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:56:00,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-08-21 23:56:00,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:00,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187618174] [2020-08-21 23:56:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:00,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187618174] [2020-08-21 23:56:00,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:56:00,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 23:56:00,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060293462] [2020-08-21 23:56:00,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:56:00,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:00,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:56:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:56:00,434 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-08-21 23:56:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:56:00,511 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-08-21 23:56:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:56:00,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-08-21 23:56:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:56:00,513 INFO L225 Difference]: With dead ends: 26 [2020-08-21 23:56:00,513 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 23:56:00,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:56:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 23:56:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 23:56:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 23:56:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 23:56:00,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-08-21 23:56:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:56:00,519 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 23:56:00,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:56:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 23:56:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 23:56:00,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:00,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:56:00,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:56:00,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-08-21 23:56:00,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:00,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130889674] [2020-08-21 23:56:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:00,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130889674] [2020-08-21 23:56:00,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:56:00,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:56:00,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24964982] [2020-08-21 23:56:00,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:56:00,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:56:00,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:56:00,778 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 11 states. [2020-08-21 23:56:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:56:00,972 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-08-21 23:56:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:56:00,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-08-21 23:56:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:56:00,973 INFO L225 Difference]: With dead ends: 27 [2020-08-21 23:56:00,973 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:56:00,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:56:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:56:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:56:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:56:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:56:00,975 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-08-21 23:56:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:56:00,976 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:56:00,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:56:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:56:00,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:56:00,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:56:00,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:56:01,052 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 23:56:01,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:56:01,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:56:01,053 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 23:56:01,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 23:56:01,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 25) no Hoare annotation was computed. [2020-08-21 23:56:01,054 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-08-21 23:56:01,055 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-21 23:56:01,055 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 23:56:01,055 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 22) no Hoare annotation was computed. [2020-08-21 23:56:01,055 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 22) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (let ((.cse2 (<= .cse0 main_~i~0)) (.cse3 (<= main_~i~0 .cse0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)))) (and .cse2 .cse3 (< main_~n~0 (+ main_~k~0 1))) (and (<= 0 main_~n~0) (<= main_~n~0 0) .cse2 .cse3)))) [2020-08-21 23:56:01,055 INFO L264 CegarLoopResult]: At program point L18-4(lines 18 22) the Hoare annotation is: (let ((.cse2 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse2)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and (<= 0 main_~n~0) (<= main_~n~0 0) .cse0 .cse1) (and (<= .cse2 main_~i~0) .cse0 .cse1 (< main_~n~0 (+ main_~k~0 1)))))) [2020-08-21 23:56:01,056 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 25) no Hoare annotation was computed. [2020-08-21 23:56:01,056 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 23:56:01,056 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 23:56:01,056 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 23:56:01,056 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 23:56:01,056 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 23:56:01,057 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 23:56:01,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:56:01 BoogieIcfgContainer [2020-08-21 23:56:01,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:56:01,078 INFO L168 Benchmark]: Toolchain (without parser) took 2364.10 ms. Allocated memory was 141.6 MB in the beginning and 231.7 MB in the end (delta: 90.2 MB). Free memory was 104.7 MB in the beginning and 154.5 MB in the end (delta: -49.8 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,079 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.58 ms. Allocated memory is still 141.6 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,081 INFO L168 Benchmark]: Boogie Preprocessor took 31.64 ms. Allocated memory is still 141.6 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,082 INFO L168 Benchmark]: RCFGBuilder took 548.44 ms. Allocated memory was 141.6 MB in the beginning and 206.6 MB in the end (delta: 65.0 MB). Free memory was 93.5 MB in the beginning and 172.5 MB in the end (delta: -79.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,083 INFO L168 Benchmark]: TraceAbstraction took 1546.47 ms. Allocated memory was 206.6 MB in the beginning and 231.7 MB in the end (delta: 25.2 MB). Free memory was 172.5 MB in the beginning and 154.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:56:01,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.58 ms. Allocated memory is still 141.6 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.64 ms. Allocated memory is still 141.6 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.44 ms. Allocated memory was 141.6 MB in the beginning and 206.6 MB in the end (delta: 65.0 MB). Free memory was 93.5 MB in the beginning and 172.5 MB in the end (delta: -79.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1546.47 ms. Allocated memory was 206.6 MB in the beginning and 231.7 MB in the end (delta: 25.2 MB). Free memory was 172.5 MB in the beginning and 154.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 18]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k) || ((2 * n <= i && i <= 2 * n) && n < k + 1)) || (((0 <= n && n <= 0) && 2 * n <= i) && i <= 2 * n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 25 SDslu, 128 SDs, 0 SdLazy, 144 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, 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, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 96 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 3243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6 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...