/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:18:28,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:18:28,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:18:28,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:18:28,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:18:28,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:18:28,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:18:28,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:18:28,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:18:28,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:18:28,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:18:28,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:18:28,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:18:28,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:18:28,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:18:28,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:18:28,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:18:28,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:18:28,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:18:28,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:18:28,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:18:28,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:18:28,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:18:28,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:18:28,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:18:28,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:18:28,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:18:28,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:18:28,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:18:28,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:18:28,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:18:28,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:18:28,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:18:28,467 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:18:28,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:18:28,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:18:28,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:18:28,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:18:28,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:18:28,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:18:28,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:18:28,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:18:28,469 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:18:28,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:18:28,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:18:28,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:18:28,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:18:28,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:18:28,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:18:28,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:18:28,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:18:28,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:18:28,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:18:28,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:18:28,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:18:28,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:28,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:18:28,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:18:28,472 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:18:28,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:18:28,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:18:28,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:18:28,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:18:28,779 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:18:28,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-21 19:18:28,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5a58fe2/53a2191cfa0d48cf8c6a564a6fe0a056/FLAG523b9337f [2020-07-21 19:18:29,297 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:18:29,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-21 19:18:29,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5a58fe2/53a2191cfa0d48cf8c6a564a6fe0a056/FLAG523b9337f [2020-07-21 19:18:29,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5a58fe2/53a2191cfa0d48cf8c6a564a6fe0a056 [2020-07-21 19:18:29,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:18:29,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:18:29,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:18:29,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:18:29,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:18:29,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d112012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29, skipping insertion in model container [2020-07-21 19:18:29,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:18:29,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:18:29,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:18:29,897 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:18:29,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:18:29,929 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:18:29,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29 WrapperNode [2020-07-21 19:18:29,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:18:29,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:18:29,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:18:29,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:18:29,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... [2020-07-21 19:18:29,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:18:29,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:18:29,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:18:29,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:18:29,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 19:18:30,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:18:30,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:18:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 19:18:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:18:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:18:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:18:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 19:18:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:18:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:18:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:18:30,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:18:30,379 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:18:30,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:18:30 BoogieIcfgContainer [2020-07-21 19:18:30,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:18:30,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:18:30,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:18:30,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:18:30,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:18:29" (1/3) ... [2020-07-21 19:18:30,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25703c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:18:30, skipping insertion in model container [2020-07-21 19:18:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:29" (2/3) ... [2020-07-21 19:18:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25703c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:18:30, skipping insertion in model container [2020-07-21 19:18:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:18:30" (3/3) ... [2020-07-21 19:18:30,409 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-07-21 19:18:30,449 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:18:30,469 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:18:30,510 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:18:30,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:18:30,561 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:18:30,562 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:18:30,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:18:30,563 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:18:30,563 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:18:30,563 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:18:30,563 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:18:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 19:18:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:18:30,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:30,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:30,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-21 19:18:30,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:30,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470681192] [2020-07-21 19:18:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:30,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:18:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:18:30,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:18:30,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470681192] [2020-07-21 19:18:30,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:18:30,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:18:30,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542114643] [2020-07-21 19:18:30,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:18:30,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:18:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:18:30,809 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 19:18:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:30,872 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-21 19:18:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:18:30,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:18:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:30,885 INFO L225 Difference]: With dead ends: 33 [2020-07-21 19:18:30,885 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 19:18:30,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:18:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 19:18:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 19:18:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 19:18:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-21 19:18:30,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-21 19:18:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:30,934 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-21 19:18:30,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:18:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-21 19:18:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:18:30,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:30,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:31,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:31,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-21 19:18:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:31,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935540669] [2020-07-21 19:18:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:31,204 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:18:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:18:31,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:18:31,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935540669] [2020-07-21 19:18:31,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:18:31,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:18:31,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076482332] [2020-07-21 19:18:31,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:18:31,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:18:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:18:31,333 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-07-21 19:18:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:31,360 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-21 19:18:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:18:31,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-21 19:18:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:31,362 INFO L225 Difference]: With dead ends: 19 [2020-07-21 19:18:31,362 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:18:31,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:18:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:18:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:18:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:18:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:18:31,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-21 19:18:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:31,365 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:18:31,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:18:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:18:31,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:18:31,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:31,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:18:31,621 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:18:31,621 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:18:31,621 INFO L268 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-07-21 19:18:31,621 INFO L271 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-07-21 19:18:31,622 INFO L268 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-07-21 19:18:31,622 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-21 19:18:31,622 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 19:18:31,622 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 19:18:31,622 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:18:31,623 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:18:31,623 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:18:31,623 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:18:31,623 INFO L268 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-07-21 19:18:31,623 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-21 19:18:31,624 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-07-21 19:18:31,624 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-07-21 19:18:31,624 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-07-21 19:18:31,624 INFO L268 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-07-21 19:18:31,624 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 37) no Hoare annotation was computed. [2020-07-21 19:18:31,624 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 37) no Hoare annotation was computed. [2020-07-21 19:18:31,625 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-21 19:18:31,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:18:31 BoogieIcfgContainer [2020-07-21 19:18:31,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:18:31,636 INFO L168 Benchmark]: Toolchain (without parser) took 1959.46 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 124.7 MB in the end (delta: -20.3 MB). Peak memory consumption was 43.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,638 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.73 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,640 INFO L168 Benchmark]: Boogie Preprocessor took 30.18 ms. Allocated memory is still 138.9 MB. Free memory was 94.6 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,642 INFO L168 Benchmark]: RCFGBuilder took 425.15 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 170.2 MB in the end (delta: -77.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,644 INFO L168 Benchmark]: TraceAbstraction took 1241.18 ms. Allocated memory is still 202.4 MB. Free memory was 170.2 MB in the beginning and 124.7 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:18:31,652 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.73 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.18 ms. Allocated memory is still 138.9 MB. Free memory was 94.6 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.15 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 170.2 MB in the end (delta: -77.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1241.18 ms. Allocated memory is still 202.4 MB. Free memory was 170.2 MB in the beginning and 124.7 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 2 SDslu, 137 SDs, 0 SdLazy, 20 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 2 QuantifiedInterpolants, 1394 SizeOfPredicates, 2 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 4/4 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...