/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.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:11:25,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:11:25,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:11:25,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:11:25,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:11:25,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:11:25,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:11:25,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:11:25,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:11:25,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:11:25,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:11:25,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:11:25,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:11:25,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:11:25,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:11:25,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:11:25,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:11:25,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:11:25,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:11:25,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:11:25,677 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 [2020-07-20 01:11:25,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:11:25,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:11:25,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:11:25,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:11:25,695 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:11:25,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:11:25,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:11:25,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:11:25,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:11:25,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:11:25,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:11:25,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:11:25,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:11:25,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:11:25,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:11:25,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:11:25,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:11:25,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:11:25,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:11:25,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:11:25,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:11:25,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:25,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:11:25,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:11:25,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:11:25,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:11:25,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:11:25,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:11:25,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:11:25,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:11:26,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:11:26,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:11:26,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:11:26,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:11:26,047 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:11:26,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-20 01:11:26,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d38cc7a7e/649557091f2545cfbe075a048e2e016b/FLAG62a6fdb7f [2020-07-20 01:11:26,657 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:11:26,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-20 01:11:26,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d38cc7a7e/649557091f2545cfbe075a048e2e016b/FLAG62a6fdb7f [2020-07-20 01:11:26,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d38cc7a7e/649557091f2545cfbe075a048e2e016b [2020-07-20 01:11:26,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:11:27,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:11:27,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:27,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:11:27,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:11:27,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:26" (1/1) ... [2020-07-20 01:11:27,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e96d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 01:11:27,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:26" (1/1) ... [2020-07-20 01:11:27,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:11:27,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:11:27,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:27,225 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:11:27,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:27,251 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:11:27,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27 WrapperNode [2020-07-20 01:11:27,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:27,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:11:27,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:11:27,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:11:27,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 01:11:27,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:11:27,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:11:27,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:11:27,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:11:27,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (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 [2020-07-20 01:11:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:11:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:11:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-20 01:11:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:11:27,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:11:27,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:11:27,433 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-20 01:11:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:11:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:11:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:11:27,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:11:27,605 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:11:27,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:27 BoogieIcfgContainer [2020-07-20 01:11:27,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:11:27,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:11:27,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:11:27,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:11:27,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:26" (1/3) ... [2020-07-20 01:11:27,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e259f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 01:11:27,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (2/3) ... [2020-07-20 01:11:27,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e259f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 01:11:27,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:27" (3/3) ... [2020-07-20 01:11:27,618 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-07-20 01:11:27,629 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:11:27,636 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:11:27,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:11:27,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:11:27,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:11:27,665 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:11:27,665 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:11:27,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:11:27,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:11:27,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:11:27,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:11:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 01:11:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:11:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:27,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:27,692 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-20 01:11:27,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:27,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736049319] [2020-07-20 01:11:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21f368f3 [2020-07-20 01:11:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:27,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736049319] [2020-07-20 01:11:27,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:27,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:11:27,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363361701] [2020-07-20 01:11:27,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:11:27,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:11:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:27,926 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-20 01:11:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:27,988 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 01:11:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:27,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 01:11:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:28,001 INFO L225 Difference]: With dead ends: 33 [2020-07-20 01:11:28,002 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 01:11:28,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 01:11:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 01:11:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 01:11:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-20 01:11:28,054 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-20 01:11:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:28,055 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-20 01:11:28,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:11:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-20 01:11:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:11:28,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:28,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:28,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:11:28,061 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-20 01:11:28,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:28,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465191093] [2020-07-20 01:11:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21f368f3 [2020-07-20 01:11:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:11:28,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465191093] [2020-07-20 01:11:28,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080779252] [2020-07-20 01:11:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a6766e7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:28,301 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a6766e7 issued 4 check-sat command(s) [2020-07-20 01:11:28,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:11:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:11:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:11:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2020-07-20 01:11:28,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593342484] [2020-07-20 01:11:28,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:11:28,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:11:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:28,423 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-07-20 01:11:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:28,450 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-20 01:11:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:11:28,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 01:11:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:28,451 INFO L225 Difference]: With dead ends: 19 [2020-07-20 01:11:28,451 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:11:28,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:11:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:11:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:11:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:11:28,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-20 01:11:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:28,455 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:11:28,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:11:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:11:28,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:11:28,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:11:28,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:11:28,694 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:11:28,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:11:28,694 INFO L268 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-07-20 01:11:28,694 INFO L271 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-07-20 01:11:28,694 INFO L268 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-07-20 01:11:28,695 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-20 01:11:28,695 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 01:11:28,695 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 01:11:28,695 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:11:28,695 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:11:28,696 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:11:28,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:11:28,696 INFO L268 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-07-20 01:11:28,696 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-20 01:11:28,696 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-07-20 01:11:28,697 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-07-20 01:11:28,697 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-07-20 01:11:28,697 INFO L268 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-07-20 01:11:28,697 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 37) no Hoare annotation was computed. [2020-07-20 01:11:28,697 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 37) no Hoare annotation was computed. [2020-07-20 01:11:28,697 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-20 01:11:28,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:11:28 BoogieIcfgContainer [2020-07-20 01:11:28,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:11:28,707 INFO L168 Benchmark]: Toolchain (without parser) took 1706.34 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 99.7 MB in the beginning and 114.8 MB in the end (delta: -15.1 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,708 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.94 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 90.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,711 INFO L168 Benchmark]: Boogie Preprocessor took 112.60 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 178.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,712 INFO L168 Benchmark]: RCFGBuilder took 244.33 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 166.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,712 INFO L168 Benchmark]: TraceAbstraction took 1093.78 ms. Allocated memory is still 199.2 MB. Free memory was 165.8 MB in the beginning and 114.8 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:28,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.94 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 90.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.60 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 178.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.33 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 166.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1093.78 ms. Allocated memory is still 199.2 MB. Free memory was 165.8 MB in the beginning and 114.8 MB in the end (delta: 51.0 MB). Peak memory consumption was 51.0 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, 124 SDs, 0 SdLazy, 19 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s 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, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 1679 SizeOfPredicates, 1 NumberOfNonLiveVariables, 49 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...