/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/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:22:21,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:22:21,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:22:21,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:22:21,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:22:21,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:22:21,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:22:21,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:22:21,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:22:21,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:22:21,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:22:21,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:22:21,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:22:21,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:22:21,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:22:21,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:22:21,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:22:21,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:22:21,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:22:21,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:22:21,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:22:21,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:22:21,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:22:21,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:22:21,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:22:21,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:22:21,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:22:21,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:22:21,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:22:21,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:22:21,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:22:21,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:22:21,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:22:21,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:22:21,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:22:21,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:22:21,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:22:21,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:22:21,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:22:21,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:22:21,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:22:21,389 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 11:22:21,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:22:21,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:22:21,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:22:21,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:22:21,416 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:22:21,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:22:21,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:22:21,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:22:21,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:22:21,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:22:21,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:22:21,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:22:21,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:22:21,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:22:21,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:22:21,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:22:21,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:22:21,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:22:21,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:22:21,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:22:21,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:22:21,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:22:21,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:22:21,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:22:21,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:22:21,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:22:21,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:22:21,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:22:21,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:22:21,422 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 11:22:21,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:22:21,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:22:21,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:22:21,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:22:21,913 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:22:21,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-09-21 11:22:21,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507c0628b/f29de3352c7045d3a5335f61cddfe3f7/FLAGf0262f653 [2020-09-21 11:22:22,531 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:22:22,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-09-21 11:22:22,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507c0628b/f29de3352c7045d3a5335f61cddfe3f7/FLAGf0262f653 [2020-09-21 11:22:22,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507c0628b/f29de3352c7045d3a5335f61cddfe3f7 [2020-09-21 11:22:22,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:22:22,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:22:22,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:22:22,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:22:22,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:22:22,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:22:22" (1/1) ... [2020-09-21 11:22:22,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4231a4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:22, skipping insertion in model container [2020-09-21 11:22:22,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:22:22" (1/1) ... [2020-09-21 11:22:22,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:22:22,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:22:23,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:22:23,211 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:22:23,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:22:23,243 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:22:23,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23 WrapperNode [2020-09-21 11:22:23,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:22:23,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:22:23,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:22:23,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:22:23,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (1/1) ... [2020-09-21 11:22:23,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:22:23,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:22:23,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:22:23,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:22:23,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (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 11:22:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:22:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:22:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-21 11:22:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:22:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:22:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-21 11:22:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:22:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:22:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:22:23,631 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:22:23,632 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:22:23,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:22:23 BoogieIcfgContainer [2020-09-21 11:22:23,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:22:23,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:22:23,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:22:23,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:22:23,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:22:22" (1/3) ... [2020-09-21 11:22:23,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e37694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:22:23, skipping insertion in model container [2020-09-21 11:22:23,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:23" (2/3) ... [2020-09-21 11:22:23,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e37694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:22:23, skipping insertion in model container [2020-09-21 11:22:23,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:22:23" (3/3) ... [2020-09-21 11:22:23,646 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-09-21 11:22:23,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:22:23,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:22:23,701 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:22:23,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:22:23,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:22:23,777 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:22:23,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:22:23,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:22:23,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:22:23,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:22:23,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:22:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:22:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:22:23,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:23,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:22:23,811 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-09-21 11:22:23,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:23,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735858941] [2020-09-21 11:22:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:23,977 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:23,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:23,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:23,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:23,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:22:23,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:22:23,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:22:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:24,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,040 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,040 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,040 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:24,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:24,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:24,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:22:24,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:24,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:24,103 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 11:22:24,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735858941] [2020-09-21 11:22:24,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:22:24,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:22:24,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758468761] [2020-09-21 11:22:24,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:22:24,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:22:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:22:24,130 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 11:22:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:24,238 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 11:22:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:22:24,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:22:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:24,257 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:22:24,257 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:22:24,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:22:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:22:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:22:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:22:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 11:22:24,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 11:22:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:24,315 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 11:22:24,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:22:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 11:22:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:22:24,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:24,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:22:24,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:22:24,318 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-09-21 11:22:24,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:24,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740063226] [2020-09-21 11:22:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,421 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,421 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,422 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,422 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:22:24,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:22:24,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:22:24,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:22:24,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:22:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,450 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,451 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,451 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,451 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:22:24,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:24,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:24,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,490 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,490 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,491 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,491 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:22:24,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:22:24,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:22:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:22:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:24,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,549 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:24,549 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:24,550 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:24,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:24,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:22:24,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:22:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:22:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:22:24,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740063226] [2020-09-21 11:22:24,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:22:24,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:22:24,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929892244] [2020-09-21 11:22:24,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:22:24,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:22:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:22:24,587 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 11:22:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:24,650 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 11:22:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:22:24,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 11:22:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:24,652 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:22:24,652 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:22:24,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:22:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:22:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:22:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:22:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:22:24,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 11:22:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:24,661 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:22:24,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:22:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:22:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:22:24,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:24,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:22:24,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:22:24,663 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-09-21 11:22:24,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:24,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838644678] [2020-09-21 11:22:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:24,949 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:22:24,949 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -2 [2020-09-21 11:22:24,950 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-21 11:22:24,950 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:24,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:22:24,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-09-21 11:22:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:22:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:22:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:22:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:25,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:25,021 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:25,021 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:25,022 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:25,022 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:25,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:22:25,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:25,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:25,160 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:22:25,160 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:25,160 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:22:25,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:25,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-21 11:22:25,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:22:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:22:25,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:25,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:25,269 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:25,269 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:25,270 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:25,270 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:25,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:22:25,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:25,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:22:25,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:25,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:22:25,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:25,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:22:25,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:25,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:25,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:25,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:25,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:25,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:25,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:22:25,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:22:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:22:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 11:22:25,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838644678] [2020-09-21 11:22:25,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:22:25,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:22:25,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646145900] [2020-09-21 11:22:25,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:22:25,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:22:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:22:25,341 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-21 11:22:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:25,431 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-09-21 11:22:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:22:25,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-21 11:22:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:25,433 INFO L225 Difference]: With dead ends: 21 [2020-09-21 11:22:25,433 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:22:25,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:22:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:22:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:22:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:22:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:22:25,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-09-21 11:22:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:25,436 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:22:25,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:22:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:22:25,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:22:25,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:22:25,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:22:25,484 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:22:25,484 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:22:25,485 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:22:25,485 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:22:25,485 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:22:25,485 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:22:25,485 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-09-21 11:22:25,485 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-09-21 11:22:25,486 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-09-21 11:22:25,486 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-09-21 11:22:25,486 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-09-21 11:22:25,486 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-09-21 11:22:25,486 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-09-21 11:22:25,486 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-09-21 11:22:25,487 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-09-21 11:22:25,487 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-21 11:22:25,487 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-09-21 11:22:25,487 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~a~0 2) [2020-09-21 11:22:25,487 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-21 11:22:25,487 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-09-21 11:22:25,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:22:25 BoogieIcfgContainer [2020-09-21 11:22:25,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:22:25,499 INFO L168 Benchmark]: Toolchain (without parser) took 2623.34 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 103.0 MB in the beginning and 165.5 MB in the end (delta: -62.5 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,500 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,502 INFO L168 Benchmark]: Boogie Preprocessor took 33.10 ms. Allocated memory is still 139.5 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,503 INFO L168 Benchmark]: RCFGBuilder took 358.75 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 169.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,504 INFO L168 Benchmark]: TraceAbstraction took 1857.65 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.8 MB in the beginning and 165.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:25,509 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.10 ms. Allocated memory is still 139.5 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.75 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 169.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1857.65 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.8 MB in the beginning and 165.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 24 SDslu, 95 SDs, 0 SdLazy, 87 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 5208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 12/18 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...