/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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-fb55353 [2019-11-07 03:50:27,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:50:27,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:50:27,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:50:27,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:50:27,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:50:27,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:50:27,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:50:27,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:50:27,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:50:27,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:50:27,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:50:27,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:50:27,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:50:27,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:50:27,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:50:27,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:50:27,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:50:27,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:50:27,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:50:27,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:50:27,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:50:27,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:50:27,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:50:27,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:50:27,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:50:27,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:50:27,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:50:27,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 03:50:27,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:50:27,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:50:27,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:50:27,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:50:27,437 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:50:27,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:50:27,440 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:50:27,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:50:27,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:50:27,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:50:27,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:50:27,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:50:27,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:50:27,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:50:27,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:50:27,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:50:27,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:50:27,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:50:27,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:50:27,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:50:27,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:50:27,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:50:27,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:50:27,444 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 [2019-11-07 03:50:27,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:50:27,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:50:27,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:50:27,776 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:50:27,777 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:50:27,777 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2019-11-07 03:50:27,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9f9b5a/f54e27a8d6b248b188790a7670495a16/FLAG025698e4f [2019-11-07 03:50:28,326 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:50:28,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-2.c [2019-11-07 03:50:28,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9f9b5a/f54e27a8d6b248b188790a7670495a16/FLAG025698e4f [2019-11-07 03:50:28,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9f9b5a/f54e27a8d6b248b188790a7670495a16 [2019-11-07 03:50:28,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:50:28,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:50:28,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:50:28,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:50:28,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:50:28,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:50:28" (1/1) ... [2019-11-07 03:50:28,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41320e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:28, skipping insertion in model container [2019-11-07 03:50:28,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:50:28" (1/1) ... [2019-11-07 03:50:28,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:50:28,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:50:28,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:50:28,977 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:50:29,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:50:29,096 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:50:29,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29 WrapperNode [2019-11-07 03:50:29,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:50:29,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:50:29,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:50:29,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:50:29,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... [2019-11-07 03:50:29,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:50:29,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:50:29,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:50:29,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:50:29,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:50:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:50:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:50:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-11-07 03:50:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-11-07 03:50:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-07 03:50:29,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:50:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:50:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:50:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-07 03:50:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-07 03:50:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:50:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-11-07 03:50:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-07 03:50:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:50:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:50:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:50:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:50:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:50:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:50:29,563 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:50:29,563 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 03:50:29,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:50:29 BoogieIcfgContainer [2019-11-07 03:50:29,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:50:29,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:50:29,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:50:29,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:50:29,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:50:28" (1/3) ... [2019-11-07 03:50:29,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f9eeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:50:29, skipping insertion in model container [2019-11-07 03:50:29,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:50:29" (2/3) ... [2019-11-07 03:50:29,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f9eeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:50:29, skipping insertion in model container [2019-11-07 03:50:29,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:50:29" (3/3) ... [2019-11-07 03:50:29,576 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-11-07 03:50:29,586 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:50:29,595 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:50:29,606 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:50:29,627 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:50:29,628 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:50:29,628 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:50:29,628 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:50:29,628 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:50:29,628 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:50:29,628 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:50:29,628 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:50:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-07 03:50:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 03:50:29,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:50:29,650 INFO L410 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] [2019-11-07 03:50:29,652 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:50:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:50:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -384501524, now seen corresponding path program 1 times [2019-11-07 03:50:29,666 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:50:29,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727601307] [2019-11-07 03:50:29,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:50:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:50:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:50:29,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727601307] [2019-11-07 03:50:29,858 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:50:29,858 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 03:50:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085426411] [2019-11-07 03:50:29,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 03:50:29,874 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:50:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 03:50:29,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 03:50:29,893 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-11-07 03:50:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:50:29,929 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-07 03:50:29,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 03:50:29,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-11-07 03:50:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:50:29,943 INFO L225 Difference]: With dead ends: 40 [2019-11-07 03:50:29,944 INFO L226 Difference]: Without dead ends: 23 [2019-11-07 03:50:29,952 INFO L630 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 [2019-11-07 03:50:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-07 03:50:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-07 03:50:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 03:50:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-07 03:50:30,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23 [2019-11-07 03:50:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:50:30,021 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-07 03:50:30,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 03:50:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-07 03:50:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 03:50:30,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:50:30,025 INFO L410 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] [2019-11-07 03:50:30,026 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:50:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:50:30,027 INFO L82 PathProgramCache]: Analyzing trace with hash -543446048, now seen corresponding path program 1 times [2019-11-07 03:50:30,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:50:30,028 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113095230] [2019-11-07 03:50:30,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:50:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:50:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:50:30,460 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113095230] [2019-11-07 03:50:30,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:50:30,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 03:50:30,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607546056] [2019-11-07 03:50:30,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 03:50:30,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:50:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 03:50:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 03:50:30,466 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-07 03:50:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:50:30,780 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-07 03:50:30,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 03:50:30,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-11-07 03:50:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:50:30,785 INFO L225 Difference]: With dead ends: 32 [2019-11-07 03:50:30,785 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 03:50:30,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-07 03:50:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 03:50:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 03:50:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 03:50:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-07 03:50:30,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2019-11-07 03:50:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:50:30,804 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-07 03:50:30,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 03:50:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-07 03:50:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 03:50:30,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:50:30,806 INFO L410 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] [2019-11-07 03:50:30,806 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:50:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:50:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash -8538139, now seen corresponding path program 1 times [2019-11-07 03:50:30,809 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:50:30,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237617843] [2019-11-07 03:50:30,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:50:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:50:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:50:31,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237617843] [2019-11-07 03:50:31,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008339774] [2019-11-07 03:50:31,137 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 [2019-11-07 03:50:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:50:31,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 03:50:31,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:50:31,313 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 [2019-11-07 03:50:31,313 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:50:31,331 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:50:31,332 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. [2019-11-07 03:50:31,332 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:54 [2019-11-07 03:50:41,534 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 03:50:41,538 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:50:41,538 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 [2019-11-07 03:50:41,539 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:50:41,549 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 03:50:41,550 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. [2019-11-07 03:50:41,551 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:30 [2019-11-07 03:50:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:50:45,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:50:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:50:45,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21678249] [2019-11-07 03:50:45,796 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-11-07 03:50:45,796 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:50:45,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:50:45,807 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:50:45,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:50:46,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2019-11-07 03:50:46,201 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2019-11-07 03:50:46,630 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:50:46,954 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 21 for LOIs [2019-11-07 03:50:46,958 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 43 for LOIs [2019-11-07 03:50:46,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2019-11-07 03:50:46,968 INFO L197 IcfgInterpreter]: Interpreting procedure init with input of size 51 for LOIs [2019-11-07 03:50:46,978 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:50:47,398 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-11-07 03:50:47,568 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-11-07 03:50:55,922 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-11-07 03:51:00,269 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2019-11-07 03:51:02,680 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-11-07 03:51:05,100 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-11-07 03:51:05,781 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2019-11-07 03:51:05,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:51:05,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 17] total 35 [2019-11-07 03:51:05,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899872419] [2019-11-07 03:51:05,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 03:51:05,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:51:05,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 03:51:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1043, Unknown=13, NotChecked=0, Total=1190 [2019-11-07 03:51:05,867 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-11-07 03:51:14,107 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57