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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:23,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:23,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:23,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:23,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:23,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:23,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:23,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:23,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:23,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:23,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:23,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:23,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:23,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:23,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:23,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:23,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:23,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:23,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:23,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:23,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:23,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:23,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:23,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:23,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:04:23,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:23,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:23,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:23,726 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 03:04:23,743 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:23,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:23,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:23,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:23,746 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:23,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:23,746 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:23,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:23,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:23,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:23,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:23,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:23,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:23,748 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:23,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:23,748 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:23,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:23,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:23,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:23,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:23,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:23,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:23,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:23,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:23,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:23,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:23,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:23,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:23,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:04:24,101 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:24,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:24,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:24,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:24,121 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:24,121 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-15 03:04:24,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193598f4a/d802b7f7a3544f03bf4eefa44b7aca7e/FLAG98e1d5623 [2019-10-15 03:04:24,705 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:24,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-15 03:04:24,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193598f4a/d802b7f7a3544f03bf4eefa44b7aca7e/FLAG98e1d5623 [2019-10-15 03:04:25,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193598f4a/d802b7f7a3544f03bf4eefa44b7aca7e [2019-10-15 03:04:25,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:25,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:25,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:25,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:25,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:25,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db71c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25, skipping insertion in model container [2019-10-15 03:04:25,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,123 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:25,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:25,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:25,361 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:25,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:25,393 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:25,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25 WrapperNode [2019-10-15 03:04:25,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:25,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:25,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:25,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:25,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (1/1) ... [2019-10-15 03:04:25,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:25,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:25,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:25,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:25,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (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 03:04:25,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:25,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:25,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:25,614 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:04:25,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:25,799 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:25,799 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:04:25,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:25 BoogieIcfgContainer [2019-10-15 03:04:25,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:25,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:25,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:25,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:25,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:25" (1/3) ... [2019-10-15 03:04:25,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62da8c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:25, skipping insertion in model container [2019-10-15 03:04:25,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:25" (2/3) ... [2019-10-15 03:04:25,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62da8c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:25, skipping insertion in model container [2019-10-15 03:04:25,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:25" (3/3) ... [2019-10-15 03:04:25,809 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-10-15 03:04:25,818 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:25,825 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:25,837 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:25,863 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:25,864 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:25,864 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:25,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:25,866 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:25,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:25,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:25,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 03:04:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 03:04:25,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:25,915 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:25,917 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash -139420869, now seen corresponding path program 1 times [2019-10-15 03:04:25,936 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:25,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900425821] [2019-10-15 03:04:25,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:25,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:25,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:26,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900425821] [2019-10-15 03:04:26,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:26,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:04:26,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322063107] [2019-10-15 03:04:26,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:04:26,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:04:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:26,138 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 03:04:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:26,180 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:04:26,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:04:26,182 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 03:04:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:26,194 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:04:26,194 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:04:26,200 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 03:04:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:04:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:04:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:04:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:04:26,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2019-10-15 03:04:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:26,236 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:04:26,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:04:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:04:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:04:26,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:26,238 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:26,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1283988460, now seen corresponding path program 1 times [2019-10-15 03:04:26,242 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:26,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895046275] [2019-10-15 03:04:26,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:26,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:26,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:04:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:04:26,322 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-15 03:04:26,323 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 03:04:26,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:04:26 BoogieIcfgContainer [2019-10-15 03:04:26,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:04:26,349 INFO L168 Benchmark]: Toolchain (without parser) took 1245.90 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 149.5 MB in the end (delta: -46.0 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,350 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.28 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,356 INFO L168 Benchmark]: Boogie Preprocessor took 138.22 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 183.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,357 INFO L168 Benchmark]: RCFGBuilder took 266.92 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 171.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,359 INFO L168 Benchmark]: TraceAbstraction took 543.48 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 149.5 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:26,371 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 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.28 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.22 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 183.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.92 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 171.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 543.48 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 149.5 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 20 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 incorrect! Received shutdown request...