/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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/ldv-regression/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:27:42,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:27:42,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:27:42,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:27:42,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:27:42,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:27:42,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:27:42,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:27:42,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:27:42,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:27:42,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:27:42,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:27:42,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:27:42,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:27:42,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:27:42,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:27:42,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:27:42,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:27:42,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:27:42,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:27:42,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:27:42,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:27:42,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:27:42,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:27:42,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:27:42,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:27:42,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:27:42,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:27:42,731 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 [2019-11-07 00:27:42,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:27:42,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:27:42,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:27:42,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:27:42,754 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:27:42,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:27:42,755 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:27:42,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:27:42,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:27:42,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:27:42,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:27:42,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:27:42,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:27:42,757 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:27:42,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:27:42,758 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:27:42,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:27:42,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:27:42,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:27:42,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:27:42,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:27:42,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:27:42,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:27:42,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:27:42,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:27:42,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:27:42,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:27:42,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:27:42,760 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 [2019-11-07 00:27:43,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:27:43,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:27:43,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:27:43,061 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:27:43,061 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:27:43,062 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2019-11-07 00:27:43,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1a3133a/1d39140bbafc41e58139ef90c2682ba3/FLAG804578f1a [2019-11-07 00:27:43,590 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:27:43,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test09.c [2019-11-07 00:27:43,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1a3133a/1d39140bbafc41e58139ef90c2682ba3/FLAG804578f1a [2019-11-07 00:27:43,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1a3133a/1d39140bbafc41e58139ef90c2682ba3 [2019-11-07 00:27:44,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:27:44,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:27:44,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:27:44,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:27:44,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:27:44,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:27:43" (1/1) ... [2019-11-07 00:27:44,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44, skipping insertion in model container [2019-11-07 00:27:44,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:27:43" (1/1) ... [2019-11-07 00:27:44,020 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:27:44,039 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:27:44,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:27:44,242 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:27:44,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:27:44,270 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:27:44,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44 WrapperNode [2019-11-07 00:27:44,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:27:44,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:27:44,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:27:44,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:27:44,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (1/1) ... [2019-11-07 00:27:44,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:27:44,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:27:44,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:27:44,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:27:44,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (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 [2019-11-07 00:27:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:27:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:27:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-07 00:27:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:27:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:27:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:27:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:27:44,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:27:44,659 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 00:27:44,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:27:44 BoogieIcfgContainer [2019-11-07 00:27:44,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:27:44,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:27:44,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:27:44,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:27:44,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:27:43" (1/3) ... [2019-11-07 00:27:44,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a088bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:27:44, skipping insertion in model container [2019-11-07 00:27:44,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:44" (2/3) ... [2019-11-07 00:27:44,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a088bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:27:44, skipping insertion in model container [2019-11-07 00:27:44,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:27:44" (3/3) ... [2019-11-07 00:27:44,689 INFO L109 eAbstractionObserver]: Analyzing ICFG test09.c [2019-11-07 00:27:44,705 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:27:44,712 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:27:44,738 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:27:44,765 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:27:44,765 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:27:44,772 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:27:44,772 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:27:44,773 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:27:44,773 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:27:44,773 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:27:44,773 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:27:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 00:27:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 00:27:44,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:27:44,796 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:27:44,798 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:27:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:27:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2019-11-07 00:27:44,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:27:44,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701274497] [2019-11-07 00:27:44,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:27:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:27:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:27:45,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701274497] [2019-11-07 00:27:45,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:27:45,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:27:45,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916243586] [2019-11-07 00:27:45,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:27:45,064 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:27:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:27:45,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:27:45,086 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-11-07 00:27:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:27:45,191 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-07 00:27:45,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:27:45,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 00:27:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:27:45,213 INFO L225 Difference]: With dead ends: 33 [2019-11-07 00:27:45,214 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 00:27:45,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:27:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 00:27:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 00:27:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 00:27:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2019-11-07 00:27:45,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2019-11-07 00:27:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:27:45,277 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2019-11-07 00:27:45,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:27:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2019-11-07 00:27:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 00:27:45,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:27:45,279 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:27:45,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:27:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:27:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2019-11-07 00:27:45,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:27:45,281 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74850335] [2019-11-07 00:27:45,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:27:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:27:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:27:45,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74850335] [2019-11-07 00:27:45,723 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:27:45,723 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:27:45,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875615951] [2019-11-07 00:27:45,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:27:45,726 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:27:45,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:27:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:27:45,727 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 7 states. [2019-11-07 00:27:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:27:45,934 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2019-11-07 00:27:45,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:27:45,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-07 00:27:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:27:45,935 INFO L225 Difference]: With dead ends: 15 [2019-11-07 00:27:45,935 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 00:27:45,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:27:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 00:27:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 00:27:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 00:27:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 00:27:45,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-07 00:27:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:27:45,938 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 00:27:45,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:27:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 00:27:45,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 00:27:45,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 00:27:46,090 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:27:46,091 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base)) [2019-11-07 00:27:46,091 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:27:46,091 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 14) no Hoare annotation was computed. [2019-11-07 00:27:46,091 INFO L443 ceAbstractionStarter]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2019-11-07 00:27:46,091 INFO L439 ceAbstractionStarter]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |~#a~0.base| ~p1~0.base)) (= |~#a~0.base| |~#b~0.base|) (not (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset))) (not (= |~#a~0.offset| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |~#a~0.base|))) [2019-11-07 00:27:46,091 INFO L443 ceAbstractionStarter]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2019-11-07 00:27:46,092 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:27:46,092 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#b~0.base| |~#a~0.base|)) (= ~p2~0.offset ~p1~0.offset) (= ~p2~0.base ~p1~0.base)) [2019-11-07 00:27:46,092 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 00:27:46,092 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:27:46,093 INFO L439 ceAbstractionStarter]: At program point L32(lines 17 39) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|))) [2019-11-07 00:27:46,093 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2019-11-07 00:27:46,093 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 17 39) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= ~p2~0.offset ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base) (= ~p2~0.base ~p1~0.base))) [2019-11-07 00:27:46,093 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2019-11-07 00:27:46,093 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (or (and (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset)) (= ~p1~0.offset |~#a~0.offset|) (= |~#a~0.base| ~p1~0.base)) (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|))) [2019-11-07 00:27:46,094 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 37) no Hoare annotation was computed. [2019-11-07 00:27:46,095 INFO L443 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2019-11-07 00:27:46,095 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2019-11-07 00:27:46,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:27:46 BoogieIcfgContainer [2019-11-07 00:27:46,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:27:46,122 INFO L168 Benchmark]: Toolchain (without parser) took 2116.22 ms. Allocated memory was 147.3 MB in the beginning and 231.7 MB in the end (delta: 84.4 MB). Free memory was 103.7 MB in the beginning and 178.5 MB in the end (delta: -74.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,127 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.03 ms. Allocated memory is still 147.3 MB. Free memory was 103.5 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,131 INFO L168 Benchmark]: Boogie Preprocessor took 133.01 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.7 MB in the beginning and 182.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,133 INFO L168 Benchmark]: RCFGBuilder took 256.82 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,135 INFO L168 Benchmark]: TraceAbstraction took 1448.42 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 167.7 MB in the beginning and 178.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:27:46,147 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.03 ms. Allocated memory is still 147.3 MB. Free memory was 103.5 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.01 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.7 MB in the beginning and 182.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.82 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1448.42 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 167.7 MB in the beginning and 178.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 17]: Loop Invariant Derived loop invariant: (a == b || !(\old(p2) == \old(p1))) || !(\old(p1) == \old(p2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 23 SDtfs, 10 SDslu, 33 SDs, 0 SdLazy, 22 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 109 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3939 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...