/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:21:12,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:21:12,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:21:12,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:21:12,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:21:12,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:21:12,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:21:12,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:21:12,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:21:12,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:21:12,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:21:12,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:21:12,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:21:12,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:21:12,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:21:12,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:21:12,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:21:12,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:21:12,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:21:12,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:21:12,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:21:12,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:21:12,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:21:12,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:21:12,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:21:12,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:21:12,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:21:12,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:21:12,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:21:12,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:21:12,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:21:12,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:21:12,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:21:12,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:21:12,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:21:12,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:21:12,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:21:12,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:21:12,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:21:12,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:21:12,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:21:12,862 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 12:21:12,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:21:12,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:21:12,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:21:12,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:21:12,894 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:21:12,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:21:12,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:21:12,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:21:12,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:21:12,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:21:12,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:21:12,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:21:12,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:21:12,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:21:12,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:21:12,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:21:12,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:21:12,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:21:12,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:21:12,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:21:12,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:21:12,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:12,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:21:12,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:21:12,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:21:12,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:21:12,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:21:12,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:21:12,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:21:12,899 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:21:13,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:21:13,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:21:13,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:21:13,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:21:13,423 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:21:13,425 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2020-09-21 12:21:13,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0819cfea5/fef7b68289844d77bb811654a635b753/FLAGcfd951860 [2020-09-21 12:21:14,028 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:21:14,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2020-09-21 12:21:14,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0819cfea5/fef7b68289844d77bb811654a635b753/FLAGcfd951860 [2020-09-21 12:21:14,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0819cfea5/fef7b68289844d77bb811654a635b753 [2020-09-21 12:21:14,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:21:14,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:21:14,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:14,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:21:14,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:21:14,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa12e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14, skipping insertion in model container [2020-09-21 12:21:14,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:21:14,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:21:14,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:14,689 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:21:14,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:14,720 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:21:14,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14 WrapperNode [2020-09-21 12:21:14,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:14,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:21:14,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:21:14,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:21:14,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (1/1) ... [2020-09-21 12:21:14,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:21:14,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:21:14,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:21:14,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:21:14,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (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 12:21:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:21:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:21:14,906 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-09-21 12:21:14,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:21:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:21:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:21:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-09-21 12:21:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:21:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:21:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:21:15,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:21:15,107 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:21:15,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:15 BoogieIcfgContainer [2020-09-21 12:21:15,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:21:15,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:21:15,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:21:15,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:21:15,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:21:14" (1/3) ... [2020-09-21 12:21:15,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bd63d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:15, skipping insertion in model container [2020-09-21 12:21:15,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:14" (2/3) ... [2020-09-21 12:21:15,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bd63d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:15, skipping insertion in model container [2020-09-21 12:21:15,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:15" (3/3) ... [2020-09-21 12:21:15,158 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-09-21 12:21:15,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:21:15,204 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:21:15,230 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:21:15,264 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:21:15,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:21:15,265 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:21:15,266 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:21:15,266 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:21:15,266 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:21:15,266 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:21:15,267 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:21:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-21 12:21:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:21:15,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:15,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:15,294 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-09-21 12:21:15,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:15,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459276428] [2020-09-21 12:21:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:21:15,435 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:21:15,436 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:21:15,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:21:15,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:21:15 BoogieIcfgContainer [2020-09-21 12:21:15,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:21:15,463 INFO L168 Benchmark]: Toolchain (without parser) took 1053.85 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 102.6 MB in the beginning and 154.3 MB in the end (delta: -51.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,464 INFO L168 Benchmark]: CDTParser took 0.21 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: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.38 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,469 INFO L168 Benchmark]: Boogie Preprocessor took 114.25 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 179.0 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,470 INFO L168 Benchmark]: RCFGBuilder took 291.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 166.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,471 INFO L168 Benchmark]: TraceAbstraction took 324.50 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 154.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:15,475 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.38 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.25 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 179.0 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 166.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 324.50 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 154.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) [L29] CALL, EXPR hanoi(n) [L17] COND TRUE n == 1 [L18] return 1; [L29] RET, EXPR hanoi(n) [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<