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/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:56:19,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:56:19,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:56:19,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:56:19,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:56:19,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:56:19,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:56:19,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:56:19,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:56:19,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:56:19,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:56:19,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:56:19,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:56:19,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:56:19,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:56:19,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:56:19,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:56:19,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:56:19,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:56:19,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:56:19,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:56:19,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:56:19,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:56:19,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:56:19,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 02:56:19,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:56:19,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:56:19,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:56:19,899 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 02:56:19,914 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:56:19,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:56:19,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:56:19,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:56:19,916 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:56:19,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:56:19,916 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:56:19,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:56:19,918 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:56:19,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:56:19,918 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:56:19,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:56:19,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:56:19,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:56:19,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:56:19,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:56:19,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:56:19,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:56:19,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:56:19,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:56:19,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:56:19,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:56:19,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:56:19,921 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 02:56:20,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:56:20,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:56:20,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:56:20,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:56:20,247 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:56:20,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2019-10-15 02:56:20,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb281579/ca9b31860fd742f98b9f9bf7578254d9/FLAGeaed71fc2 [2019-10-15 02:56:20,778 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:56:20,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-2.c [2019-10-15 02:56:20,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb281579/ca9b31860fd742f98b9f9bf7578254d9/FLAGeaed71fc2 [2019-10-15 02:56:21,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb281579/ca9b31860fd742f98b9f9bf7578254d9 [2019-10-15 02:56:21,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:56:21,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:56:21,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:21,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:56:21,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:56:21,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e156f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21, skipping insertion in model container [2019-10-15 02:56:21,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:56:21,204 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:56:21,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:21,427 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:56:21,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:21,560 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:56:21,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21 WrapperNode [2019-10-15 02:56:21,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:21,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:56:21,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:56:21,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:56:21,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:56:21,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:56:21,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:56:21,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:56:21,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (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 02:56:21,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:56:21,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:56:21,669 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-10-15 02:56:21,669 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-10-15 02:56:21,670 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-10-15 02:56:21,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:56:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:56:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:56:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:56:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:56:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:56:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 02:56:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:56:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:56:22,077 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:56:22,078 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 02:56:22,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:22 BoogieIcfgContainer [2019-10-15 02:56:22,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:56:22,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:56:22,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:56:22,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:56:22,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:56:21" (1/3) ... [2019-10-15 02:56:22,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56905093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:22, skipping insertion in model container [2019-10-15 02:56:22,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (2/3) ... [2019-10-15 02:56:22,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56905093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:22, skipping insertion in model container [2019-10-15 02:56:22,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:22" (3/3) ... [2019-10-15 02:56:22,087 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-10-15 02:56:22,097 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:56:22,106 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:56:22,117 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:56:22,137 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:56:22,137 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:56:22,137 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:56:22,138 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:56:22,138 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:56:22,138 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:56:22,138 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:56:22,138 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:56:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-15 02:56:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:56:22,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:22,161 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:22,163 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -384501524, now seen corresponding path program 1 times [2019-10-15 02:56:22,176 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:22,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657380526] [2019-10-15 02:56:22,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:56:22,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657380526] [2019-10-15 02:56:22,361 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:56:22,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:56:22,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339499599] [2019-10-15 02:56:22,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:56:22,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:56:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:56:22,385 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-10-15 02:56:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:22,409 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-15 02:56:22,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:56:22,411 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-10-15 02:56:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:22,419 INFO L225 Difference]: With dead ends: 40 [2019-10-15 02:56:22,420 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 02:56:22,423 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 02:56:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 02:56:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-15 02:56:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 02:56:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-15 02:56:22,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23 [2019-10-15 02:56:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:22,465 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-15 02:56:22,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:56:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-15 02:56:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 02:56:22,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:22,467 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:22,468 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -543446048, now seen corresponding path program 1 times [2019-10-15 02:56:22,468 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:22,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664404549] [2019-10-15 02:56:22,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:56:22,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664404549] [2019-10-15 02:56:22,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:56:22,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 02:56:22,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780318684] [2019-10-15 02:56:22,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 02:56:22,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 02:56:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 02:56:22,827 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-10-15 02:56:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:23,138 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-15 02:56:23,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 02:56:23,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-10-15 02:56:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:23,141 INFO L225 Difference]: With dead ends: 32 [2019-10-15 02:56:23,141 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 02:56:23,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-15 02:56:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 02:56:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 02:56:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 02:56:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 02:56:23,164 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2019-10-15 02:56:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:23,164 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 02:56:23,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 02:56:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 02:56:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 02:56:23,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:23,169 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:23,169 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash -8538139, now seen corresponding path program 1 times [2019-10-15 02:56:23,171 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:23,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789130306] [2019-10-15 02:56:23,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:23,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:23,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:56:23,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789130306] [2019-10-15 02:56:23,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278486027] [2019-10-15 02:56:23,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:56:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:23,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 02:56:23,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:56:23,731 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-10-15 02:56:23,732 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:56:23,750 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:56:23,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 02:56:23,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:54 [2019-10-15 02:56:33,963 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 02:56:33,970 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:56:33,970 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 21 [2019-10-15 02:56:33,971 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:56:33,985 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:56:33,986 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-15 02:56:33,987 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:30 [2019-10-15 02:56:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:56:38,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:56:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 02:56:38,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048877270] [2019-10-15 02:56:38,209 INFO L162 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-10-15 02:56:38,209 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:56:38,216 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:56:38,223 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:56:38,224 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:56:38,477 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2019-10-15 02:56:38,677 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2019-10-15 02:56:39,494 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:40,658 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:41,188 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:41,535 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:41,987 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:42,314 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:42,534 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:43,115 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:43,530 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:56:43,683 INFO L199 IcfgInterpreter]: Interpreting procedure check with input of size 21 for LOIs [2019-10-15 02:56:43,691 INFO L199 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 43 for LOIs [2019-10-15 02:56:43,712 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2019-10-15 02:56:43,724 INFO L199 IcfgInterpreter]: Interpreting procedure init with input of size 51 for LOIs [2019-10-15 02:56:43,735 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:56:44,294 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-10-15 02:56:57,045 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2019-10-15 02:56:59,469 WARN L191 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-10-15 02:57:01,826 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 02:57:02,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:57:02,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 16] total 34 [2019-10-15 02:57:02,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934078288] [2019-10-15 02:57:02,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 02:57:02,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:57:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 02:57:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=981, Unknown=13, NotChecked=0, Total=1122 [2019-10-15 02:57:02,588 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 34 states.