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/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 12:50:03,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 12:50:03,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 12:50:03,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 12:50:03,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 12:50:03,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 12:50:03,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 12:50:03,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 12:50:03,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 12:50:03,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 12:50:03,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 12:50:03,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-07 12:50:03,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 12:50:03,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 12:50:03,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 12:50:03,781 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 [2019-10-07 12:50:03,800 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 12:50:03,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 12:50:03,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 12:50:03,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 12:50:03,803 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 12:50:03,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 12:50:03,804 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 12:50:03,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 12:50:03,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 12:50:03,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 12:50:03,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 12:50:03,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 12:50:03,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 12:50:03,806 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 12:50:03,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 12:50:03,806 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 12:50:03,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 12:50:03,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 12:50:03,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 12:50:03,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 12:50:03,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 12:50:03,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 12:50:03,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 12:50:03,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 12:50:03,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 12:50:03,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 12:50:03,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 12:50:03,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 12:50:03,809 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 [2019-10-07 12:50:04,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 12:50:04,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 12:50:04,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 12:50:04,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 12:50:04,127 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 12:50:04,127 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-10-07 12:50:04,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cf0f86e/1b126ac537c844ea99c5018981566439/FLAG56c27124c [2019-10-07 12:50:04,684 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 12:50:04,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-10-07 12:50:04,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cf0f86e/1b126ac537c844ea99c5018981566439/FLAG56c27124c [2019-10-07 12:50:05,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cf0f86e/1b126ac537c844ea99c5018981566439 [2019-10-07 12:50:05,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 12:50:05,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 12:50:05,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 12:50:05,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 12:50:05,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 12:50:05,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7abc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05, skipping insertion in model container [2019-10-07 12:50:05,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,051 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 12:50:05,065 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 12:50:05,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 12:50:05,279 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 12:50:05,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 12:50:05,315 INFO L192 MainTranslator]: Completed translation [2019-10-07 12:50:05,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05 WrapperNode [2019-10-07 12:50:05,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 12:50:05,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 12:50:05,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 12:50:05,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 12:50:05,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (1/1) ... [2019-10-07 12:50:05,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 12:50:05,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 12:50:05,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 12:50:05,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 12:50:05,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (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 [2019-10-07 12:50:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 12:50:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 12:50:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-07 12:50:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 12:50:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 12:50:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-07 12:50:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 12:50:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 12:50:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 12:50:05,746 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 12:50:05,746 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 12:50:05,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:50:05 BoogieIcfgContainer [2019-10-07 12:50:05,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 12:50:05,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 12:50:05,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 12:50:05,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 12:50:05,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:50:05" (1/3) ... [2019-10-07 12:50:05,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899c2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:50:05, skipping insertion in model container [2019-10-07 12:50:05,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:50:05" (2/3) ... [2019-10-07 12:50:05,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899c2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:50:05, skipping insertion in model container [2019-10-07 12:50:05,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:50:05" (3/3) ... [2019-10-07 12:50:05,769 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2019-10-07 12:50:05,785 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 12:50:05,810 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 12:50:05,836 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 12:50:05,897 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 12:50:05,897 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 12:50:05,897 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 12:50:05,898 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 12:50:05,898 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 12:50:05,898 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 12:50:05,898 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 12:50:05,900 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 12:50:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-10-07 12:50:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-07 12:50:05,927 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 12:50:05,928 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 12:50:05,930 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 12:50:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 12:50:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2019-10-07 12:50:05,942 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 12:50:05,942 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 12:50:05,943 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 12:50:05,943 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 12:50:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 12:50:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 12:50:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 12:50:06,097 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 12:50:06,097 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 12:50:06,097 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 12:50:06,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 12:50:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 12:50:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 12:50:06,114 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2019-10-07 12:50:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 12:50:06,185 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-10-07 12:50:06,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 12:50:06,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-10-07 12:50:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 12:50:06,195 INFO L225 Difference]: With dead ends: 25 [2019-10-07 12:50:06,196 INFO L226 Difference]: Without dead ends: 13 [2019-10-07 12:50:06,199 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 12:50:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-07 12:50:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-10-07 12:50:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-07 12:50:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-07 12:50:06,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-10-07 12:50:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 12:50:06,234 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-07 12:50:06,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 12:50:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-07 12:50:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 12:50:06,235 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 12:50:06,235 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 12:50:06,236 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 12:50:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 12:50:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2019-10-07 12:50:06,237 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 12:50:06,237 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 12:50:06,237 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 12:50:06,237 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 12:50:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 12:50:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 12:50:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 12:50:06,298 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 12:50:06,298 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 12:50:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 12:50:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 12:50:06,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 12:50:06,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 12:50:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 12:50:06,351 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 12:50:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 12:50:06,388 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 12:50:06,410 INFO L162 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-10-07 12:50:06,410 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 12:50:06,417 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 12:50:06,426 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 12:50:06,427 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 12:50:06,482 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-07 12:50:06,724 INFO L199 IcfgInterpreter]: Interpreting procedure __blast_assert with input of size 1 for LOIs [2019-10-07 12:50:06,729 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-07 12:50:06,733 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 12:50:06,734 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 12:50:06,734 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-07 12:50:06,735 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-07 12:50:06,735 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 108#true [2019-10-07 12:50:06,735 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 12:50:06,736 INFO L193 IcfgInterpreter]: Reachable states at location __blast_assertENTRY satisfy 94#true [2019-10-07 12:50:06,736 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 103#true [2019-10-07 12:50:06,736 INFO L193 IcfgInterpreter]: Reachable states at location L16-3 satisfy 90#(or (and (<= 0 main_~i~0) (<= main_~i~0 0) (= main_~i~0 0)) (and (<= 1 main_~i~0) (not (= main_~i~0 3)))) [2019-10-07 12:50:06,737 INFO L193 IcfgInterpreter]: Reachable states at location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 99#true [2019-10-07 12:50:06,737 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 84#(and (= main_~i~0 3) (<= main_~i~0 3) (<= 1 main_~i~0) (<= 3 main_~i~0)) [2019-10-07 12:50:06,737 INFO L193 IcfgInterpreter]: Reachable states at location L16 satisfy 79#(<= 1 main_~i~0) [2019-10-07 12:50:06,790 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 12:50:06,791 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 7 [2019-10-07 12:50:06,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 12:50:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 12:50:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 12:50:06,794 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-10-07 12:50:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 12:50:06,817 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-07 12:50:06,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 12:50:06,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-07 12:50:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 12:50:06,818 INFO L225 Difference]: With dead ends: 12 [2019-10-07 12:50:06,818 INFO L226 Difference]: Without dead ends: 0 [2019-10-07 12:50:06,819 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-07 12:50:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-07 12:50:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-07 12:50:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-07 12:50:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-07 12:50:06,820 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-10-07 12:50:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 12:50:06,821 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-07 12:50:06,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 12:50:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-07 12:50:06,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-07 12:50:07,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 12:50:07,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-07 12:50:07,067 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-07 12:50:07,067 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-07 12:50:07,067 INFO L443 ceAbstractionStarter]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2019-10-07 12:50:07,067 INFO L446 ceAbstractionStarter]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2019-10-07 12:50:07,067 INFO L443 ceAbstractionStarter]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-10-07 12:50:07,068 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-07 12:50:07,068 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-07 12:50:07,068 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-07 12:50:07,068 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-07 12:50:07,068 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 22) the Hoare annotation is: true [2019-10-07 12:50:07,069 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 22) no Hoare annotation was computed. [2019-10-07 12:50:07,069 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-10-07 12:50:07,069 INFO L439 ceAbstractionStarter]: At program point L16-2(line 16) the Hoare annotation is: false [2019-10-07 12:50:07,069 INFO L439 ceAbstractionStarter]: At program point L16-3(lines 13 20) the Hoare annotation is: (= main_~i~0 0) [2019-10-07 12:50:07,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 12:50:07 BoogieIcfgContainer [2019-10-07 12:50:07,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 12:50:07,090 INFO L168 Benchmark]: Toolchain (without parser) took 2055.34 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 103.4 MB in the beginning and 112.0 MB in the end (delta: -8.6 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,091 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.12 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 94.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,093 INFO L168 Benchmark]: Boogie Preprocessor took 167.09 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 94.1 MB in the beginning and 184.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,094 INFO L168 Benchmark]: RCFGBuilder took 263.71 ms. Allocated memory is still 205.0 MB. Free memory was 184.5 MB in the beginning and 172.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,095 INFO L168 Benchmark]: TraceAbstraction took 1337.06 ms. Allocated memory is still 205.0 MB. Free memory was 172.3 MB in the beginning and 112.0 MB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. [2019-10-07 12:50:07,099 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.12 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 94.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 167.09 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 94.1 MB in the beginning and 184.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.71 ms. Allocated memory is still 205.0 MB. Free memory was 184.5 MB in the beginning and 172.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1337.06 ms. Allocated memory is still 205.0 MB. Free memory was 172.3 MB in the beginning and 112.0 MB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 13]: Loop Invariant Derived loop invariant: i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 14 locations, 1 error locations. Result: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 1 SDslu, 36 SDs, 0 SdLazy, 11 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 636 SizeOfPredicates, 1 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 328, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 24, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 13, TOOLS_POST_TIME[ms]: 14, TOOLS_POST_CALL_APPLICATIONS: 5, TOOLS_POST_CALL_TIME[ms]: 2, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME[ms]: 11, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 6, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 18, DOMAIN_JOIN_TIME[ms]: 149, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 76, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 13, DOMAIN_ISBOTTOM_APPLICATIONS: 2, DOMAIN_ISBOTTOM_TIME[ms]: 6, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 176, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 176, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME[ms]: 7, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 6, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 13, DAG_COMPRESSION_PROCESSED_NODES: 61, DAG_COMPRESSION_RETAINED_NODES: 41, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...