/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 CAMEL_NO_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 [2020-07-19 21:13:18,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:13:18,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:13:18,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:13:18,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:13:18,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:13:18,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:13:18,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:13:18,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:13:18,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:13:18,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:13:18,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:13:18,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:13:18,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:13:18,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:13:18,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:13:18,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:13:18,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:13:18,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:13:18,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:13:18,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:13:18,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:13:18,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:13:18,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:13:18,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:13:18,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:13:18,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:13:18,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:13:18,524 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 [2020-07-19 21:13:18,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:13:18,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:13:18,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:13:18,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:13:18,562 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:13:18,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:13:18,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:13:18,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:13:18,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:13:18,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:13:18,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:13:18,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:13:18,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:13:18,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:13:18,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:13:18,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:13:18,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:13:18,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:13:18,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:13:18,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:13:18,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:13:18,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:13:18,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:13:18,894 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:13:18,894 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-19 21:13:18,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13c5d7df/75e5f001c5ad4b67b42ac673a6ec266f/FLAGb5dcc38d6 [2020-07-19 21:13:19,384 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:13:19,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-19 21:13:19,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13c5d7df/75e5f001c5ad4b67b42ac673a6ec266f/FLAGb5dcc38d6 [2020-07-19 21:13:19,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13c5d7df/75e5f001c5ad4b67b42ac673a6ec266f [2020-07-19 21:13:19,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:13:19,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:13:19,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:13:19,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:13:19,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:13:19,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:19" (1/1) ... [2020-07-19 21:13:19,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1830d5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:19, skipping insertion in model container [2020-07-19 21:13:19,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:19" (1/1) ... [2020-07-19 21:13:19,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:13:19,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:13:19,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:13:19,999 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:13:20,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:13:20,029 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:13:20,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20 WrapperNode [2020-07-19 21:13:20,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:13:20,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:13:20,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:13:20,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:13:20,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (1/1) ... [2020-07-19 21:13:20,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:13:20,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:13:20,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:13:20,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:13:20,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (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 [2020-07-19 21:13:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:13:20,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:13:20,201 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-19 21:13:20,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:13:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:13:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:13:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-19 21:13:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:13:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:13:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:13:20,362 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:13:20,362 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:13:20,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:20 BoogieIcfgContainer [2020-07-19 21:13:20,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:13:20,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:13:20,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:13:20,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:13:20,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:19" (1/3) ... [2020-07-19 21:13:20,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25956a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:20, skipping insertion in model container [2020-07-19 21:13:20,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:20" (2/3) ... [2020-07-19 21:13:20,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25956a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:20, skipping insertion in model container [2020-07-19 21:13:20,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:20" (3/3) ... [2020-07-19 21:13:20,373 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-07-19 21:13:20,381 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:13:20,388 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:13:20,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:13:20,424 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:13:20,424 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:13:20,424 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:13:20,424 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:13:20,425 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:13:20,425 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:13:20,425 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:13:20,425 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:13:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-19 21:13:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:13:20,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:20,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:20,451 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-19 21:13:20,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:20,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885716258] [2020-07-19 21:13:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13e2dde8 [2020-07-19 21:13:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:13:20,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885716258] [2020-07-19 21:13:20,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:13:20,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:13:20,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255482494] [2020-07-19 21:13:20,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:13:20,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:13:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:13:20,685 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-19 21:13:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:20,735 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-19 21:13:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:13:20,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 21:13:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:20,748 INFO L225 Difference]: With dead ends: 33 [2020-07-19 21:13:20,749 INFO L226 Difference]: Without dead ends: 19 [2020-07-19 21:13:20,752 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 [2020-07-19 21:13:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-19 21:13:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-19 21:13:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-19 21:13:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-19 21:13:20,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-19 21:13:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:20,794 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-19 21:13:20,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:13:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-19 21:13:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:13:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:20,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:20,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:13:20,797 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-19 21:13:20,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:20,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685477638] [2020-07-19 21:13:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13e2dde8 [2020-07-19 21:13:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:13:20,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685477638] [2020-07-19 21:13:20,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830189175] [2020-07-19 21:13:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13e2dde8 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 [2020-07-19 21:13:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:21,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:13:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:13:21,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:13:21,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2020-07-19 21:13:21,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749502944] [2020-07-19 21:13:21,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:13:21,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:13:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:13:21,101 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-07-19 21:13:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:21,124 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-19 21:13:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:13:21,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-19 21:13:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:21,126 INFO L225 Difference]: With dead ends: 19 [2020-07-19 21:13:21,126 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:13:21,127 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 [2020-07-19 21:13:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:13:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:13:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:13:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:13:21,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-19 21:13:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:21,129 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:13:21,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:13:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:13:21,130 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:13:21,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:13:21,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:13:21,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:13:21,376 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:13:21,376 INFO L268 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-07-19 21:13:21,377 INFO L271 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-07-19 21:13:21,377 INFO L268 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-07-19 21:13:21,378 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-19 21:13:21,378 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-19 21:13:21,378 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-19 21:13:21,378 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:13:21,378 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:13:21,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:13:21,379 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:13:21,379 INFO L268 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-07-19 21:13:21,379 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-19 21:13:21,379 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-07-19 21:13:21,379 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-07-19 21:13:21,380 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-07-19 21:13:21,380 INFO L268 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-07-19 21:13:21,380 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 37) no Hoare annotation was computed. [2020-07-19 21:13:21,380 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 37) no Hoare annotation was computed. [2020-07-19 21:13:21,380 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-19 21:13:21,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:13:21 BoogieIcfgContainer [2020-07-19 21:13:21,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:13:21,390 INFO L168 Benchmark]: Toolchain (without parser) took 1616.17 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 119.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,391 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.01 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,393 INFO L168 Benchmark]: Boogie Preprocessor took 23.05 ms. Allocated memory is still 136.8 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,394 INFO L168 Benchmark]: RCFGBuilder took 311.93 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 170.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,395 INFO L168 Benchmark]: TraceAbstraction took 1020.36 ms. Allocated memory is still 201.3 MB. Free memory was 169.4 MB in the beginning and 119.3 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:21,399 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.01 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.05 ms. Allocated memory is still 136.8 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.93 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 170.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1020.36 ms. Allocated memory is still 201.3 MB. Free memory was 169.4 MB in the beginning and 119.3 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 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: 0.9s, 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, 0.1s 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, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 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...