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/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:35:51,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:35:51,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:35:51,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:35:51,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:35:51,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:35:51,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:35:51,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:35:51,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:35:51,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:35:51,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:35:51,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:35:51,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:35:51,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:35:51,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:35:51,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:35:51,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:35:51,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:35:51,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:35:51,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:35:51,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:35:51,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:35:51,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:35:51,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:35:51,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:35:51,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:35:51,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:35:51,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:35:51,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:35:51,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:35:51,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:35:51,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:35:51,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:35:51,694 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:35:51,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:35:51,694 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:35:51,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:35:51,696 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:35:51,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:35:51,696 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:35:51,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:35:51,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:35:51,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:35:51,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:35:51,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:35:51,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:35:51,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:35:51,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:35:51,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:35:51,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:35:51,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:35:51,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:35:51,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:35:51,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:35:52,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:35:52,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:35:52,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:35:52,011 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:35:52,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2019-10-13 21:35:52,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ce018d5/421852ecc8f44879aafe416412ab1874/FLAG806202dc8 [2019-10-13 21:35:52,612 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:35:52,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i [2019-10-13 21:35:52,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ce018d5/421852ecc8f44879aafe416412ab1874/FLAG806202dc8 [2019-10-13 21:35:53,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ce018d5/421852ecc8f44879aafe416412ab1874 [2019-10-13 21:35:53,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:35:53,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:35:53,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:35:53,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:35:53,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:35:53,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3890461f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53, skipping insertion in model container [2019-10-13 21:35:53,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,043 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:35:53,064 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:35:53,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:35:53,273 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:35:53,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:35:53,395 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:35:53,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53 WrapperNode [2019-10-13 21:35:53,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:35:53,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:35:53,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:35:53,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:35:53,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... [2019-10-13 21:35:53,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:35:53,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:35:53,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:35:53,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:35:53,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:35:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:35:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:35:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:35:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:35:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:35:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:35:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:35:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:35:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:35:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:35:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:35:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:35:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:35:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:35:54,020 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:35:54,020 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:35:54,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:54 BoogieIcfgContainer [2019-10-13 21:35:54,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:35:54,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:35:54,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:35:54,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:35:54,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:35:53" (1/3) ... [2019-10-13 21:35:54,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1945c9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:54, skipping insertion in model container [2019-10-13 21:35:54,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:53" (2/3) ... [2019-10-13 21:35:54,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1945c9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:54, skipping insertion in model container [2019-10-13 21:35:54,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:54" (3/3) ... [2019-10-13 21:35:54,033 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2019-10-13 21:35:54,043 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:35:54,052 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:35:54,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:35:54,095 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:35:54,095 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:35:54,096 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:35:54,096 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:35:54,096 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:35:54,096 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:35:54,096 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:35:54,097 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:35:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 21:35:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:35:54,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:54,127 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:54,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 945226407, now seen corresponding path program 1 times [2019-10-13 21:35:54,147 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:54,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631393024] [2019-10-13 21:35:54,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:54,148 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:54,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:35:54,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631393024] [2019-10-13 21:35:54,301 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:35:54,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:35:54,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512894235] [2019-10-13 21:35:54,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:35:54,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:35:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:35:54,324 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-13 21:35:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:54,379 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-13 21:35:54,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:35:54,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-13 21:35:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:54,390 INFO L225 Difference]: With dead ends: 35 [2019-10-13 21:35:54,391 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 21:35:54,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:35:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 21:35:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 21:35:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 21:35:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-13 21:35:54,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2019-10-13 21:35:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:54,432 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-13 21:35:54,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:35:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-13 21:35:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:35:54,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:54,434 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:54,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269372, now seen corresponding path program 1 times [2019-10-13 21:35:54,435 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:54,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286748796] [2019-10-13 21:35:54,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:54,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:54,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 21:35:54,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286748796] [2019-10-13 21:35:54,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620425169] [2019-10-13 21:35:54,526 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 [2019-10-13 21:35:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:54,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:35:54,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 21:35:54,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:35:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 21:35:54,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159521639] [2019-10-13 21:35:54,682 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:35:54,682 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:35:54,689 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:35:54,698 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:35:54,699 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:35:54,866 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:35:55,883 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:35:55,905 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:35:55,910 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:35:55,911 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:35:55,911 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 210#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:55,912 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 215#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:55,912 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 224#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:35:55,912 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:35:55,913 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:55,913 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:55,914 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 229#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:55,914 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:35:55,915 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:35:55,916 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 205#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 21:35:55,916 INFO L193 IcfgInterpreter]: Reachable states at location L23-3 satisfy 200#(and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 100000 main_~i~0) (not (< main_~i~0 100000)) (<= 0 main_~f~0)) [2019-10-13 21:35:55,917 INFO L193 IcfgInterpreter]: Reachable states at location L23-2 satisfy 195#(or (and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 0 main_~f~0)) (and (<= 0 main_~i~0) (<= main_~f~0 1) (= main_~f~0 1) (<= main_~i~0 0) (= main_~i~0 0) (<= 1 main_~f~0))) [2019-10-13 21:35:55,917 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 220#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:56,187 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:35:56,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-13 21:35:56,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96649064] [2019-10-13 21:35:56,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:35:56,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:35:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:35:56,192 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2019-10-13 21:35:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:56,802 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-10-13 21:35:56,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 21:35:56,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-10-13 21:35:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:56,804 INFO L225 Difference]: With dead ends: 34 [2019-10-13 21:35:56,804 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 21:35:56,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2019-10-13 21:35:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 21:35:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 21:35:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 21:35:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-13 21:35:56,813 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2019-10-13 21:35:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:56,814 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-13 21:35:56,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:35:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-13 21:35:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 21:35:56,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:56,815 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:57,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:57,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1883799143, now seen corresponding path program 2 times [2019-10-13 21:35:57,021 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:57,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677184256] [2019-10-13 21:35:57,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:57,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:57,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:35:57,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677184256] [2019-10-13 21:35:57,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441446489] [2019-10-13 21:35:57,163 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:57,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 21:35:57,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:35:57,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:35:57,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:35:57,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:35:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:35:57,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532575741] [2019-10-13 21:35:57,335 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:35:57,336 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:35:57,337 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:35:57,337 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:35:57,338 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:35:57,388 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:35:58,011 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:35:58,029 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:35:58,035 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:35:58,036 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:35:58,036 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 209#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:58,036 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 214#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:58,036 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 223#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:35:58,037 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:35:58,038 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:58,038 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:58,039 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 228#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:35:58,039 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:35:58,045 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:35:58,045 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 204#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 21:35:58,046 INFO L193 IcfgInterpreter]: Reachable states at location L23-3 satisfy 199#(and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 100000 main_~i~0) (not (< main_~i~0 100000)) (<= 0 main_~f~0)) [2019-10-13 21:35:58,046 INFO L193 IcfgInterpreter]: Reachable states at location L23-2 satisfy 194#(or (and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 0 main_~f~0)) (and (<= 0 main_~i~0) (<= main_~f~0 1) (= main_~f~0 1) (<= main_~i~0 0) (= main_~i~0 0) (<= 1 main_~f~0))) [2019-10-13 21:35:58,046 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 219#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:35:58,330 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:35:58,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-13 21:35:58,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129663865] [2019-10-13 21:35:58,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 21:35:58,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 21:35:58,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:35:58,334 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 23 states. [2019-10-13 21:35:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:59,348 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2019-10-13 21:35:59,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 21:35:59,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2019-10-13 21:35:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:59,350 INFO L225 Difference]: With dead ends: 58 [2019-10-13 21:35:59,351 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 21:35:59,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 21:35:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 21:35:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 21:35:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 21:35:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-13 21:35:59,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 24 [2019-10-13 21:35:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:59,374 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-13 21:35:59,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 21:35:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-13 21:35:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 21:35:59,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:59,376 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:59,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:59,578 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1126640647, now seen corresponding path program 3 times [2019-10-13 21:35:59,579 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:59,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208020864] [2019-10-13 21:35:59,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:59,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:59,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-13 21:35:59,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208020864] [2019-10-13 21:35:59,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793204546] [2019-10-13 21:35:59,858 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:59,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:35:59,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:35:59,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:35:59,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-13 21:35:59,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-13 21:36:00,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138620375] [2019-10-13 21:36:00,197 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:00,197 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:00,198 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:00,198 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:00,198 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:00,223 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:00,662 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:36:00,671 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:00,675 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:00,675 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:00,675 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 210#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:00,675 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 215#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:00,676 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 224#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:00,676 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:36:00,676 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:00,676 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:00,676 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 229#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:00,677 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:00,677 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:36:00,677 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 205#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 21:36:00,677 INFO L193 IcfgInterpreter]: Reachable states at location L23-3 satisfy 200#(and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 100000 main_~i~0) (not (< main_~i~0 100000)) (<= 0 main_~f~0)) [2019-10-13 21:36:00,677 INFO L193 IcfgInterpreter]: Reachable states at location L23-2 satisfy 195#(or (and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 0 main_~f~0)) (and (<= 0 main_~i~0) (<= main_~f~0 1) (= main_~f~0 1) (<= main_~i~0 0) (= main_~i~0 0) (<= 1 main_~f~0))) [2019-10-13 21:36:00,678 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 220#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:00,983 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:00,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-13 21:36:00,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439782002] [2019-10-13 21:36:00,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 21:36:00,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 21:36:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 21:36:00,987 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 35 states. [2019-10-13 21:36:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:03,153 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2019-10-13 21:36:03,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-13 21:36:03,154 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-13 21:36:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:03,156 INFO L225 Difference]: With dead ends: 106 [2019-10-13 21:36:03,156 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 21:36:03,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1871, Invalid=5439, Unknown=0, NotChecked=0, Total=7310 [2019-10-13 21:36:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 21:36:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-13 21:36:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 21:36:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-10-13 21:36:03,178 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 42 [2019-10-13 21:36:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:03,179 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-10-13 21:36:03,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 21:36:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-10-13 21:36:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:36:03,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:03,182 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:03,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:03,394 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1289318585, now seen corresponding path program 4 times [2019-10-13 21:36:03,396 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:03,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181702482] [2019-10-13 21:36:03,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:03,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:03,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-13 21:36:03,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181702482] [2019-10-13 21:36:03,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316560462] [2019-10-13 21:36:03,851 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:04,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 21:36:04,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-13 21:36:04,029 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-13 21:36:04,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546295045] [2019-10-13 21:36:04,841 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:04,841 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:04,842 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:04,842 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:04,842 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:04,866 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:05,303 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:36:05,310 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:05,317 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:05,317 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:05,317 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 210#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:05,318 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 215#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:05,318 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 224#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:36:05,318 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:36:05,318 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 229#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 205#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 21:36:05,319 INFO L193 IcfgInterpreter]: Reachable states at location L23-3 satisfy 200#(and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 100000 main_~i~0) (not (< main_~i~0 100000)) (<= 0 main_~f~0)) [2019-10-13 21:36:05,320 INFO L193 IcfgInterpreter]: Reachable states at location L23-2 satisfy 195#(or (and (<= 0 main_~i~0) (<= main_~f~0 1) (<= 0 main_~f~0)) (and (<= 0 main_~i~0) (<= main_~f~0 1) (= main_~f~0 1) (<= main_~i~0 0) (= main_~i~0 0) (<= 1 main_~f~0))) [2019-10-13 21:36:05,320 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 220#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:36:05,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:05,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-13 21:36:05,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672907606] [2019-10-13 21:36:05,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-13 21:36:05,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-13 21:36:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-13 21:36:05,661 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 59 states. [2019-10-13 21:36:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:11,564 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2019-10-13 21:36:11,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-10-13 21:36:11,564 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2019-10-13 21:36:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:11,566 INFO L225 Difference]: With dead ends: 202 [2019-10-13 21:36:11,566 INFO L226 Difference]: Without dead ends: 151 [2019-10-13 21:36:11,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6549 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7127, Invalid=17679, Unknown=0, NotChecked=0, Total=24806 [2019-10-13 21:36:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-13 21:36:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-13 21:36:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-13 21:36:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2019-10-13 21:36:11,596 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 78 [2019-10-13 21:36:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:11,597 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2019-10-13 21:36:11,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-13 21:36:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2019-10-13 21:36:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:36:11,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:11,600 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:11,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:11,806 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1805290041, now seen corresponding path program 5 times [2019-10-13 21:36:11,807 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:11,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761297731] [2019-10-13 21:36:11,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:11,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:11,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-10-13 21:36:12,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761297731] [2019-10-13 21:36:12,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486860272] [2019-10-13 21:36:12,922 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true