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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:22:28,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:22:28,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:22:28,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:22:28,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:22:28,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:22:28,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:22:28,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:22:28,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:22:28,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:22:28,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:22:28,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:22:28,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:22:28,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:22:28,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:22:28,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:22:28,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:22:28,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:22:28,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:22:28,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:22:28,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:22:28,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:22:28,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:22:28,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:22:28,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:22:28,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:22:28,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:22:28,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:22:28,419 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 [2019-10-15 01:22:28,453 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:22:28,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:22:28,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:22:28,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:22:28,458 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:22:28,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:22:28,458 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:22:28,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:22:28,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:22:28,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:22:28,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:22:28,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:22:28,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:22:28,460 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:22:28,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:22:28,460 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:22:28,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:22:28,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:22:28,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:22:28,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:22:28,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:22:28,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:22:28,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:22:28,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:22:28,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:22:28,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:22:28,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:22:28,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:22:28,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:22:28,748 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:22:28,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:22:28,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:22:28,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:22:28,775 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:22:28,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-10-15 01:22:28,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bb912977/b386832be09a43afba03c77996e7f112/FLAGdf2b79059 [2019-10-15 01:22:29,286 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:22:29,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-10-15 01:22:29,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bb912977/b386832be09a43afba03c77996e7f112/FLAGdf2b79059 [2019-10-15 01:22:29,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bb912977/b386832be09a43afba03c77996e7f112 [2019-10-15 01:22:29,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:22:29,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:22:29,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:29,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:22:29,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:22:29,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:29,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71518f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29, skipping insertion in model container [2019-10-15 01:22:29,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:29,697 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:22:29,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:22:29,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:29,931 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:22:29,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:29,976 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:22:29,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29 WrapperNode [2019-10-15 01:22:29,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:29,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:22:29,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:22:29,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:22:30,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... [2019-10-15 01:22:30,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:22:30,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:22:30,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:22:30,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:22:30,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:22:30,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:22:30,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:22:30,156 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-15 01:22:30,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:22:30,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:22:30,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:22:30,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:22:30,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:22:30,472 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:22:30,472 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:22:30,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:30 BoogieIcfgContainer [2019-10-15 01:22:30,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:22:30,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:22:30,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:22:30,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:22:30,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:22:29" (1/3) ... [2019-10-15 01:22:30,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c74de81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:30, skipping insertion in model container [2019-10-15 01:22:30,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:29" (2/3) ... [2019-10-15 01:22:30,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c74de81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:30, skipping insertion in model container [2019-10-15 01:22:30,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:30" (3/3) ... [2019-10-15 01:22:30,485 INFO L109 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2019-10-15 01:22:30,495 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:22:30,503 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:22:30,512 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:22:30,537 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:22:30,537 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:22:30,537 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:22:30,537 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:22:30,537 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:22:30,537 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:22:30,538 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:22:30,538 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:22:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-15 01:22:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:30,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:30,562 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:30,564 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-10-15 01:22:30,576 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:30,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754928202] [2019-10-15 01:22:30,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:30,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754928202] [2019-10-15 01:22:30,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:30,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:22:30,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462256408] [2019-10-15 01:22:30,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:30,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:30,749 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-10-15 01:22:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:30,777 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-15 01:22:30,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:30,778 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-10-15 01:22:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:30,788 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:22:30,788 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:22:30,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:22:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:22:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:22:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-15 01:22:30,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-15 01:22:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:30,841 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-15 01:22:30,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-15 01:22:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:30,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:30,845 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:30,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:30,846 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-10-15 01:22:30,846 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:30,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684720596] [2019-10-15 01:22:30,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:30,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684720596] [2019-10-15 01:22:30,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:30,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:30,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754603195] [2019-10-15 01:22:30,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:30,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:30,935 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-15 01:22:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:30,975 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-15 01:22:30,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:30,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-15 01:22:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:30,978 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:22:30,978 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:22:30,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:22:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-15 01:22:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:22:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-15 01:22:30,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-15 01:22:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:30,989 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-15 01:22:30,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-15 01:22:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:22:30,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:30,991 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:30,991 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-10-15 01:22:30,992 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:30,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469391959] [2019-10-15 01:22:30,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:30,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:31,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469391959] [2019-10-15 01:22:31,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253671797] [2019-10-15 01:22:31,120 INFO L94 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 -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 [2019-10-15 01:22:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:31,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:22:31,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:22:31,288 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:31,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:22:31,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:22:31,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870129380] [2019-10-15 01:22:31,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:31,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:31,335 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-15 01:22:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:31,355 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-15 01:22:31,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:31,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-15 01:22:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:31,358 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:22:31,358 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:22:31,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:22:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-15 01:22:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:22:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 01:22:31,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-15 01:22:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:31,374 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 01:22:31,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 01:22:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:22:31,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:31,376 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:31,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:31,583 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-10-15 01:22:31,585 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:31,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923676044] [2019-10-15 01:22:31,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:31,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:31,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:22:31,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923676044] [2019-10-15 01:22:31,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:31,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:31,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744106829] [2019-10-15 01:22:31,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:31,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:31,716 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-15 01:22:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:31,737 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-15 01:22:31,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:31,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-15 01:22:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:31,743 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:22:31,743 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:22:31,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:22:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-15 01:22:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:22:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:22:31,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-15 01:22:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:31,754 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:22:31,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:22:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:22:31,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:31,757 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:31,757 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-10-15 01:22:31,758 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:31,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961957035] [2019-10-15 01:22:31,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:31,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:31,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:22:31,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961957035] [2019-10-15 01:22:31,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529794694] [2019-10-15 01:22:31,857 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:31,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:22:31,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:22:31,972 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:22:32,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [916812323] [2019-10-15 01:22:32,030 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 43 [2019-10-15 01:22:32,071 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:22:32,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:22:32,136 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:22:32,137 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 30 variables. [2019-10-15 01:22:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:32,141 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:22:32,186 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-15 01:22:32,187 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:22:32,189 INFO L553 sIntCurrentIteration]: We unified 41 AI predicates to 41 [2019-10-15 01:22:32,189 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:22:32,190 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:22:32,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:22:32,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846896487] [2019-10-15 01:22:32,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:32,191 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:32,192 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:22:32,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:32,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:32,192 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 2 states. [2019-10-15 01:22:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:32,195 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-10-15 01:22:32,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:32,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-15 01:22:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:32,195 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:22:32,195 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:22:32,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:22:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:22:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:22:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:22:32,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2019-10-15 01:22:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:32,197 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:22:32,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:22:32,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:22:32,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:32,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:22:32,462 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:32,462 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:32,462 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:32,462 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:32,462 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:22:32,463 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:32,463 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:32,463 INFO L443 ceAbstractionStarter]: For program point sumEXIT(lines 4 13) no Hoare annotation was computed. [2019-10-15 01:22:32,463 INFO L446 ceAbstractionStarter]: At program point sumENTRY(lines 4 13) the Hoare annotation is: true [2019-10-15 01:22:32,468 INFO L443 ceAbstractionStarter]: For program point L9-2(lines 9 11) no Hoare annotation was computed. [2019-10-15 01:22:32,468 INFO L446 ceAbstractionStarter]: At program point L9-3(lines 9 11) the Hoare annotation is: true [2019-10-15 01:22:32,469 INFO L443 ceAbstractionStarter]: For program point L9-4(lines 9 11) no Hoare annotation was computed. [2019-10-15 01:22:32,469 INFO L443 ceAbstractionStarter]: For program point sumFINAL(lines 4 13) no Hoare annotation was computed. [2019-10-15 01:22:32,469 INFO L443 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-10-15 01:22:32,469 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 15 42) no Hoare annotation was computed. [2019-10-15 01:22:32,469 INFO L443 ceAbstractionStarter]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2019-10-15 01:22:32,469 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 25) the Hoare annotation is: false [2019-10-15 01:22:32,470 INFO L439 ceAbstractionStarter]: At program point L23-4(lines 23 25) the Hoare annotation is: false [2019-10-15 01:22:32,470 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-10-15 01:22:32,470 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 15 42) no Hoare annotation was computed. [2019-10-15 01:22:32,473 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-10-15 01:22:32,473 INFO L439 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: false [2019-10-15 01:22:32,473 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-10-15 01:22:32,473 INFO L443 ceAbstractionStarter]: For program point L36-1(line 36) no Hoare annotation was computed. [2019-10-15 01:22:32,474 INFO L439 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: false [2019-10-15 01:22:32,474 INFO L443 ceAbstractionStarter]: For program point L32-2(lines 32 34) no Hoare annotation was computed. [2019-10-15 01:22:32,474 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 15 42) the Hoare annotation is: true [2019-10-15 01:22:32,474 INFO L443 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2019-10-15 01:22:32,474 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 34) the Hoare annotation is: false [2019-10-15 01:22:32,474 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 32 34) no Hoare annotation was computed. [2019-10-15 01:22:32,474 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-10-15 01:22:32,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:22:32 BoogieIcfgContainer [2019-10-15 01:22:32,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:22:32,491 INFO L168 Benchmark]: Toolchain (without parser) took 2808.62 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.3 MB in the beginning and 169.6 MB in the end (delta: -66.3 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,494 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.37 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,498 INFO L168 Benchmark]: Boogie Preprocessor took 120.61 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,500 INFO L168 Benchmark]: RCFGBuilder took 375.23 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 164.1 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,502 INFO L168 Benchmark]: TraceAbstraction took 2011.78 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 164.1 MB in the beginning and 169.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:32,510 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.37 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.61 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.23 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 164.1 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2011.78 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 164.1 MB in the beginning and 169.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Result: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 3 SDslu, 78 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 33 PreInvPairs, 33 NumberOfFragments, 11 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 12829 SizeOfPredicates, 2 NumberOfNonLiveVariables, 273 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 186/205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 111, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9573170731707317, AVG_VARS_REMOVED_DURING_WEAKENING: 1.2439024390243902, AVG_WEAKENED_CONJUNCTS: 0.14634146341463414, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...