/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:46:00,079 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 10:46:00,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:46:00,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:46:00,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:46:00,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:46:00,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:46:00,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:46:00,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:46:00,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:46:00,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:46:00,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:46:00,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:46:00,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:46:00,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:46:00,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:46:00,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:46:00,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:46:00,131 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 10:46:00,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:46:00,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:46:00,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:46:00,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:46:00,147 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:46:00,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:46:00,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:46:00,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:46:00,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:46:00,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:46:00,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:46:00,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:46:00,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:46:00,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:46:00,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:46:00,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:46:00,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:46:00,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:46:00,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:46:00,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:46:00,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:46:00,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:46:00,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:46:00,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:46:00,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:46:00,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:46:00,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:00,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:46:00,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:46:00,152 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 -> NOT_INCREMENTALLY [2020-07-20 10:46:00,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:46:00,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:46:00,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:46:00,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:46:00,453 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:46:00,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-20 10:46:00,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab41fb0af/3614693c89b14b0f813f68776006d668/FLAGeb888483c [2020-07-20 10:46:01,003 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:46:01,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-20 10:46:01,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab41fb0af/3614693c89b14b0f813f68776006d668/FLAGeb888483c [2020-07-20 10:46:01,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab41fb0af/3614693c89b14b0f813f68776006d668 [2020-07-20 10:46:01,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:46:01,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:46:01,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:01,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:46:01,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:46:01,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01, skipping insertion in model container [2020-07-20 10:46:01,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:46:01,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:46:01,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:01,680 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:46:01,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:01,712 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:46:01,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01 WrapperNode [2020-07-20 10:46:01,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:01,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:46:01,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:46:01,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:46:01,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (1/1) ... [2020-07-20 10:46:01,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:46:01,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:46:01,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:46:01,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:46:01,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (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 10:46:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:46:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:46:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-20 10:46:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:46:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:46:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:46:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-20 10:46:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:46:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:46:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:46:02,106 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:46:02,106 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:46:02,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:02 BoogieIcfgContainer [2020-07-20 10:46:02,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:46:02,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:46:02,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:46:02,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:46:02,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:46:01" (1/3) ... [2020-07-20 10:46:02,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470a58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:02, skipping insertion in model container [2020-07-20 10:46:02,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:01" (2/3) ... [2020-07-20 10:46:02,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470a58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:02, skipping insertion in model container [2020-07-20 10:46:02,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:02" (3/3) ... [2020-07-20 10:46:02,119 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-07-20 10:46:02,130 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:46:02,138 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:46:02,152 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:46:02,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:46:02,177 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:46:02,177 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:46:02,177 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:46:02,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:46:02,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:46:02,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:46:02,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:46:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-20 10:46:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 10:46:02,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:02,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:02,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-07-20 10:46:02,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:02,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134672616] [2020-07-20 10:46:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 10:46:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 10:46:02,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:02,527 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 10:46:02,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:02,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134672616] [2020-07-20 10:46:02,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:02,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:46:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511107508] [2020-07-20 10:46:02,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:46:02,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:46:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:46:02,555 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-07-20 10:46:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:02,717 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 10:46:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:46:02,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 10:46:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:02,730 INFO L225 Difference]: With dead ends: 40 [2020-07-20 10:46:02,730 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 10:46:02,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:46:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 10:46:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 10:46:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 10:46:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 10:46:02,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-20 10:46:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:02,778 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 10:46:02,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:46:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 10:46:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 10:46:02,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:02,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:02,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:02,990 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-07-20 10:46:02,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:02,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187893040] [2020-07-20 10:46:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 10:46:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:46:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:03,078 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 10:46:03,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:03,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187893040] [2020-07-20 10:46:03,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:03,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:46:03,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209546425] [2020-07-20 10:46:03,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:46:03,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:46:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:46:03,088 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-07-20 10:46:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:03,132 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-20 10:46:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:46:03,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 10:46:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:03,135 INFO L225 Difference]: With dead ends: 34 [2020-07-20 10:46:03,135 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 10:46:03,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:46:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 10:46:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 10:46:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 10:46:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 10:46:03,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-07-20 10:46:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:03,156 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 10:46:03,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:46:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 10:46:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 10:46:03,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:03,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:03,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:03,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-07-20 10:46:03,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:03,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724935725] [2020-07-20 10:46:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 10:46:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:46:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:03,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:03,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:46:03,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724935725] [2020-07-20 10:46:03,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:03,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-20 10:46:03,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129837762] [2020-07-20 10:46:03,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:03,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:03,960 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-07-20 10:46:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:04,298 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-07-20 10:46:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:46:04,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-07-20 10:46:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:04,301 INFO L225 Difference]: With dead ends: 38 [2020-07-20 10:46:04,301 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 10:46:04,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:46:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 10:46:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-07-20 10:46:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 10:46:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 10:46:04,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-07-20 10:46:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:04,320 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 10:46:04,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 10:46:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:46:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:04,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:04,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:04,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2020-07-20 10:46:04,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:04,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973057108] [2020-07-20 10:46:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-20 10:46:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:46:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:46:04,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973057108] [2020-07-20 10:46:04,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:04,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 10:46:04,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805180178] [2020-07-20 10:46:04,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:46:04,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:46:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:04,669 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-07-20 10:46:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:04,727 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 10:46:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:46:04,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 10:46:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:04,729 INFO L225 Difference]: With dead ends: 31 [2020-07-20 10:46:04,730 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 10:46:04,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:46:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 10:46:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 10:46:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 10:46:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-20 10:46:04,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2020-07-20 10:46:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:04,738 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-20 10:46:04,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:46:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-20 10:46:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 10:46:04,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:04,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:04,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:04,949 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1459427924, now seen corresponding path program 1 times [2020-07-20 10:46:04,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:04,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933044998] [2020-07-20 10:46:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:04,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:46:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:46:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:46:05,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933044998] [2020-07-20 10:46:05,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:05,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 10:46:05,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733450791] [2020-07-20 10:46:05,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:46:05,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:46:05,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:05,145 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-07-20 10:46:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:05,208 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-07-20 10:46:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:46:05,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 10:46:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:05,209 INFO L225 Difference]: With dead ends: 32 [2020-07-20 10:46:05,209 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:46:05,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:46:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:46:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:46:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:46:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:46:05,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-07-20 10:46:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:05,211 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:46:05,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:46:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:46:05,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:46:05,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:05,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:46:05,567 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:46:05,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:46:05,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:46:05,567 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:46:05,567 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:46:05,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:46:05,568 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 10:46:05,568 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 45) the Hoare annotation is: true [2020-07-20 10:46:05,568 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 10:46:05,571 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 45) no Hoare annotation was computed. [2020-07-20 10:46:05,572 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 45) no Hoare annotation was computed. [2020-07-20 10:46:05,572 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 10:46:05,572 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 10:46:05,572 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (<= 0 main_~n~0) [2020-07-20 10:46:05,572 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 10:46:05,573 INFO L268 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2020-07-20 10:46:05,573 INFO L268 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2020-07-20 10:46:05,573 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (<= addition_~n 0) (= |addition_#in~m| addition_~m) (not (= 0 addition_~n))) [2020-07-20 10:46:05,573 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-07-20 10:46:05,574 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 10:46:05,574 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (< 0 addition_~n)) [2020-07-20 10:46:05,574 INFO L268 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-07-20 10:46:05,575 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-20 10:46:05,575 INFO L271 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2020-07-20 10:46:05,575 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-20 10:46:05,575 INFO L268 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2020-07-20 10:46:05,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:46:05 BoogieIcfgContainer [2020-07-20 10:46:05,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:46:05,594 INFO L168 Benchmark]: Toolchain (without parser) took 4169.93 ms. Allocated memory was 137.9 MB in the beginning and 246.4 MB in the end (delta: 108.5 MB). Free memory was 102.4 MB in the beginning and 187.6 MB in the end (delta: -85.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:05,596 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 10:46:05,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.89 ms. Allocated memory is still 137.9 MB. Free memory was 101.9 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:05,600 INFO L168 Benchmark]: Boogie Preprocessor took 120.67 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 180.2 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:05,603 INFO L168 Benchmark]: RCFGBuilder took 275.60 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:05,604 INFO L168 Benchmark]: TraceAbstraction took 3477.06 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 166.2 MB in the beginning and 187.6 MB in the end (delta: -21.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:05,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.89 ms. Allocated memory is still 137.9 MB. Free memory was 101.9 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.67 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 180.2 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.60 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3477.06 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 166.2 MB in the beginning and 187.6 MB in the end (delta: -21.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 77 SDslu, 256 SDs, 0 SdLazy, 329 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 32 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 11654 SizeOfPredicates, 20 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 32/42 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...