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-f4eb214f-m [2019-10-13 23:00:29,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:29,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:29,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:29,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:29,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:29,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:29,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:29,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:29,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:29,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:29,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:29,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:29,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:29,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:29,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:29,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:29,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:29,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:29,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:29,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:29,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:29,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:29,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:29,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:29,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:29,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:29,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:29,452 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 [2019-10-13 23:00:29,472 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:29,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:29,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:29,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:29,474 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:29,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:29,475 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:29,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:29,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:29,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:29,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:29,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:29,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:29,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:29,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:29,477 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:29,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:29,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:29,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:29,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:29,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:29,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:29,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:29,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:29,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:29,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:29,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:29,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:29,480 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 [2019-10-13 23:00:29,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:29,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:29,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:29,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:29,775 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:29,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-13 23:00:29,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff59301e5/d32dd7e38e4e47b9a8c3d9d7a1c38289/FLAGb776bc7b8 [2019-10-13 23:00:30,264 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:30,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-13 23:00:30,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff59301e5/d32dd7e38e4e47b9a8c3d9d7a1c38289/FLAGb776bc7b8 [2019-10-13 23:00:30,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff59301e5/d32dd7e38e4e47b9a8c3d9d7a1c38289 [2019-10-13 23:00:30,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:30,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:30,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:30,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:30,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:30,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:30,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6581bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30, skipping insertion in model container [2019-10-13 23:00:30,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:30,732 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:30,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:30,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:30,943 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:30,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:30,972 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:30,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30 WrapperNode [2019-10-13 23:00:30,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:30,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:30,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:30,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:31,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (1/1) ... [2019-10-13 23:00:31,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:31,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:31,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:31,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:31,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (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 [2019-10-13 23:00:31,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:31,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:00:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:00:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:31,319 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:31,319 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 23:00:31,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:31 BoogieIcfgContainer [2019-10-13 23:00:31,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:31,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:31,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:31,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:31,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:30" (1/3) ... [2019-10-13 23:00:31,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28038d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:31, skipping insertion in model container [2019-10-13 23:00:31,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:30" (2/3) ... [2019-10-13 23:00:31,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28038d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:31, skipping insertion in model container [2019-10-13 23:00:31,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:31" (3/3) ... [2019-10-13 23:00:31,328 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-10-13 23:00:31,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:31,356 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:31,389 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:31,428 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:31,429 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:31,429 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:31,432 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:31,432 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:31,432 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:31,433 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:31,433 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-13 23:00:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-13 23:00:31,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:31,458 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:31,460 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash -139420869, now seen corresponding path program 1 times [2019-10-13 23:00:31,476 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:31,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882974680] [2019-10-13 23:00:31,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:31,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882974680] [2019-10-13 23:00:31,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:31,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:31,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879749187] [2019-10-13 23:00:31,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:31,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:31,591 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-13 23:00:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:31,618 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 23:00:31,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:31,619 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-13 23:00:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:31,627 INFO L225 Difference]: With dead ends: 31 [2019-10-13 23:00:31,628 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 23:00:31,631 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 [2019-10-13 23:00:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 23:00:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 23:00:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 23:00:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 23:00:31,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2019-10-13 23:00:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:31,665 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 23:00:31,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 23:00:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 23:00:31,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:31,666 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:31,667 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1283988460, now seen corresponding path program 1 times [2019-10-13 23:00:31,668 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:31,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639410843] [2019-10-13 23:00:31,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 23:00:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 23:00:31,720 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-13 23:00:31,720 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 23:00:31,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:00:31 BoogieIcfgContainer [2019-10-13 23:00:31,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 23:00:31,756 INFO L168 Benchmark]: Toolchain (without parser) took 1037.92 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 104.4 MB in the beginning and 149.1 MB in the end (delta: -44.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,758 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.38 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 95.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,763 INFO L168 Benchmark]: Boogie Preprocessor took 115.30 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 95.0 MB in the beginning and 183.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,764 INFO L168 Benchmark]: RCFGBuilder took 231.98 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 171.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,766 INFO L168 Benchmark]: TraceAbstraction took 430.59 ms. Allocated memory is still 204.5 MB. Free memory was 170.8 MB in the beginning and 149.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:31,777 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.38 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 95.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.30 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 95.0 MB in the beginning and 183.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.98 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 171.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 430.59 ms. Allocated memory is still 204.5 MB. Free memory was 170.8 MB in the beginning and 149.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 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: 0.3s, 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...