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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:35:49,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:35:49,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:35:49,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:35:49,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:35:49,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:35:49,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:35:49,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:35:49,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:35:49,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:35:49,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:35:49,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:35:49,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:35:49,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:35:49,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:35:49,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:35:49,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:35:49,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:35:49,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:35:49,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:35:49,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:35:49,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:35:49,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:35:49,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:35:49,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:35:49,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:35:49,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:35:49,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:35:49,990 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 21:35:50,004 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:35:50,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:35:50,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:35:50,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:35:50,005 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:35:50,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:35:50,006 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:35:50,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:35:50,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:35:50,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:35:50,008 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:35:50,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:35:50,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:35:50,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:35:50,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:35:50,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:35:50,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:35:50,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:35:50,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:35:50,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:35:50,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:35:50,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:35:50,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:35:50,010 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 21:35:50,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:35:50,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:35:50,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:35:50,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:35:50,316 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:35:50,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2019-10-13 21:35:50,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910c9e405/1c98d59efc83417ca60ff5ec927b827d/FLAGcfe800554 [2019-10-13 21:35:50,859 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:35:50,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2019-10-13 21:35:50,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910c9e405/1c98d59efc83417ca60ff5ec927b827d/FLAGcfe800554 [2019-10-13 21:35:51,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910c9e405/1c98d59efc83417ca60ff5ec927b827d [2019-10-13 21:35:51,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:35:51,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:35:51,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:35:51,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:35:51,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:35:51,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a41ec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51, skipping insertion in model container [2019-10-13 21:35:51,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,248 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:35:51,266 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:35:51,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:35:51,475 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:35:51,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:35:51,514 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:35:51,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51 WrapperNode [2019-10-13 21:35:51,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:35:51,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:35:51,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:35:51,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:35:51,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (1/1) ... [2019-10-13 21:35:51,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:35:51,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:35:51,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:35:51,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:35:51,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (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 21:35:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:35:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:35:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:35:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:35:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:35:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:35:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:35:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:35:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:35:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:35:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:35:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:35:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:35:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:35:52,231 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:35:52,231 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:35:52,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:52 BoogieIcfgContainer [2019-10-13 21:35:52,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:35:52,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:35:52,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:35:52,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:35:52,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:35:51" (1/3) ... [2019-10-13 21:35:52,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df13aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:52, skipping insertion in model container [2019-10-13 21:35:52,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:51" (2/3) ... [2019-10-13 21:35:52,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df13aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:52, skipping insertion in model container [2019-10-13 21:35:52,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:52" (3/3) ... [2019-10-13 21:35:52,242 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2019-10-13 21:35:52,252 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:35:52,262 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:35:52,276 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:35:52,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:35:52,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:35:52,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:35:52,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:35:52,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:35:52,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:35:52,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:35:52,308 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:35:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 21:35:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:35:52,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:52,329 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:52,331 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash 945226407, now seen corresponding path program 1 times [2019-10-13 21:35:52,343 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:52,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480463892] [2019-10-13 21:35:52,344 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:52,344 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:52,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:52,506 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 21:35:52,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480463892] [2019-10-13 21:35:52,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:35:52,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:35:52,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740077337] [2019-10-13 21:35:52,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:35:52,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:35:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:35:52,533 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-13 21:35:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:52,599 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-13 21:35:52,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:35:52,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-13 21:35:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:52,608 INFO L225 Difference]: With dead ends: 35 [2019-10-13 21:35:52,609 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 21:35:52,612 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 21:35:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 21:35:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 21:35:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 21:35:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-13 21:35:52,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2019-10-13 21:35:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:52,649 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-13 21:35:52,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:35:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-13 21:35:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:35:52,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:52,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:52,651 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269372, now seen corresponding path program 1 times [2019-10-13 21:35:52,653 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:52,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467158041] [2019-10-13 21:35:52,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:52,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:52,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:52,746 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 21:35:52,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467158041] [2019-10-13 21:35:52,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484837785] [2019-10-13 21:35:52,747 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 21:35:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:52,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:35:52,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:52,843 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 21:35:52,844 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:35:52,887 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 21:35:52,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390702453] [2019-10-13 21:35:52,915 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:35:52,915 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:35:52,925 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:35:52,935 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:35:52,936 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:35:53,130 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:35:53,979 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:35:53,993 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:35:53,998 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:35:53,999 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:35:53,999 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 21:35:53,999 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 21:35:54,000 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 21:35:54,000 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:35:54,000 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 21:35:54,001 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 21:35:54,001 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 21:35:54,001 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 21:35:54,001 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:35:54,002 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:35:54,002 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 21:35:54,002 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 21:35:54,002 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 21:35:54,274 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:35:54,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-13 21:35:54,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432065742] [2019-10-13 21:35:54,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:35:54,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:35:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:35:54,282 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2019-10-13 21:35:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:54,904 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-10-13 21:35:54,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 21:35:54,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-10-13 21:35:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:54,905 INFO L225 Difference]: With dead ends: 34 [2019-10-13 21:35:54,906 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 21:35:54,908 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 21:35:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 21:35:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 21:35:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 21:35:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-13 21:35:54,916 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2019-10-13 21:35:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:54,916 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-13 21:35:54,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:35:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-13 21:35:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 21:35:54,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:54,917 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:55,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:55,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1883799143, now seen corresponding path program 2 times [2019-10-13 21:35:55,127 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:55,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777832753] [2019-10-13 21:35:55,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:55,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:55,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:55,275 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 21:35:55,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777832753] [2019-10-13 21:35:55,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660922939] [2019-10-13 21:35:55,276 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 21:35:55,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 21:35:55,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:35:55,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:35:55,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:55,371 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 21:35:55,371 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:35:55,441 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 21:35:55,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691924955] [2019-10-13 21:35:55,443 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:35:55,444 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:35:55,444 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:35:55,444 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:35:55,445 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:35:55,486 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:35:56,084 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:35:56,095 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:35:56,099 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:35:56,100 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:35:56,100 INFO L193 IcfgInterpreter]: Reachable states at location L2 satisfy 208#(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 21:35:56,101 INFO L193 IcfgInterpreter]: Reachable states at location L2-1 satisfy 213#(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 21:35:56,101 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 222#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:35:56,101 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:35:56,102 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 218#(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 21:35:56,102 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 21:35:56,103 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 21:35:56,103 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 227#(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 21:35:56,103 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:35:56,104 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:35:56,104 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 203#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 21:35:56,104 INFO L193 IcfgInterpreter]: Reachable states at location L23-3 satisfy 198#(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 21:35:56,104 INFO L193 IcfgInterpreter]: Reachable states at location L23-2 satisfy 193#(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 21:35:56,387 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:35:56,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-13 21:35:56,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977400731] [2019-10-13 21:35:56,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 21:35:56,389 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 21:35:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:35:56,390 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 23 states. [2019-10-13 21:35:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:35:57,368 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2019-10-13 21:35:57,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 21:35:57,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2019-10-13 21:35:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:35:57,370 INFO L225 Difference]: With dead ends: 58 [2019-10-13 21:35:57,370 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 21:35:57,372 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 21:35:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 21:35:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 21:35:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 21:35:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-13 21:35:57,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 24 [2019-10-13 21:35:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:35:57,383 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-13 21:35:57,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 21:35:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-13 21:35:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 21:35:57,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:35:57,385 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:35:57,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:35:57,588 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:35:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:35:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1126640647, now seen corresponding path program 3 times [2019-10-13 21:35:57,589 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:35:57,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214546822] [2019-10-13 21:35:57,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:57,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:35:57,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:35:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:35:57,906 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 21:35:57,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214546822] [2019-10-13 21:35:57,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101779815] [2019-10-13 21:35:57,907 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 21:35:58,007 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:35:58,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:35:58,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:35:58,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:35:58,031 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 21:35:58,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:35:58,250 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 21:35:58,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647792008] [2019-10-13 21:35:58,252 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:35:58,252 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:35:58,253 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:35:58,254 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:35:58,254 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:35:58,277 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:35:58,688 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:35:58,697 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:35:58,700 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:35:58,701 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:35:58,701 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 21:35:58,701 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 21:35:58,701 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 21:35:58,701 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:35:58,702 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 21:35:58,702 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 21:35:58,702 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 21:35:58,702 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 21:35:58,703 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:35:58,703 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:35:58,703 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 21:35:58,703 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 21:35:58,703 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 21:35:58,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:35:58,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-13 21:35:58,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277425925] [2019-10-13 21:35:58,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 21:35:58,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:35:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 21:35:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 21:35:58,962 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 35 states. [2019-10-13 21:36:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:01,212 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2019-10-13 21:36:01,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-13 21:36:01,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-13 21:36:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:01,215 INFO L225 Difference]: With dead ends: 106 [2019-10-13 21:36:01,215 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 21:36:01,219 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 21:36:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 21:36:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-13 21:36:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 21:36:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-10-13 21:36:01,234 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 42 [2019-10-13 21:36:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:01,234 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-10-13 21:36:01,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 21:36:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-10-13 21:36:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 21:36:01,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:01,237 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:01,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:01,447 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1289318585, now seen corresponding path program 4 times [2019-10-13 21:36:01,447 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:01,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878460249] [2019-10-13 21:36:01,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:01,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:01,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:01,909 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 21:36:01,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878460249] [2019-10-13 21:36:01,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568605964] [2019-10-13 21:36:01,910 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 21:36:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:02,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 21:36:02,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:36:02,097 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 21:36:02,097 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:36:02,972 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 21:36:02,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140196257] [2019-10-13 21:36:02,977 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 21:36:02,978 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:36:02,979 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:36:02,979 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:36:02,980 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:36:03,009 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:36:03,722 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 21:36:03,733 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:36:03,737 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:36:03,737 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:36:03,737 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 21:36:03,738 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 21:36:03,738 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 21:36:03,738 INFO L193 IcfgInterpreter]: Reachable states at location L16-2 satisfy 135#(<= 0 main_~i~0) [2019-10-13 21:36:03,738 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 21:36:03,738 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 21:36:03,739 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 21:36:03,739 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 21:36:03,739 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:36:03,739 INFO L193 IcfgInterpreter]: Reachable states at location L10-3 satisfy 68#true [2019-10-13 21:36:03,739 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 21:36:03,739 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 21:36:03,740 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 21:36:04,061 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:36:04,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-13 21:36:04,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929449429] [2019-10-13 21:36:04,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-13 21:36:04,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:36:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-13 21:36:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-13 21:36:04,068 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 59 states. [2019-10-13 21:36:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:36:09,940 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2019-10-13 21:36:09,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-10-13 21:36:09,941 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2019-10-13 21:36:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:36:09,942 INFO L225 Difference]: With dead ends: 202 [2019-10-13 21:36:09,943 INFO L226 Difference]: Without dead ends: 151 [2019-10-13 21:36:09,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6549 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7127, Invalid=17679, Unknown=0, NotChecked=0, Total=24806 [2019-10-13 21:36:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-13 21:36:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-13 21:36:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-13 21:36:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2019-10-13 21:36:09,972 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 78 [2019-10-13 21:36:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:36:09,972 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2019-10-13 21:36:09,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-13 21:36:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2019-10-13 21:36:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:36:09,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:36:09,976 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:36:10,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:36:10,182 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:36:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:36:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1805290041, now seen corresponding path program 5 times [2019-10-13 21:36:10,183 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:36:10,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795451031] [2019-10-13 21:36:10,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:10,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:36:10,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:36:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:36:11,347 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 21:36:11,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795451031] [2019-10-13 21:36:11,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574035480] [2019-10-13 21:36:11,348 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