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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:06,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:06,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:06,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:06,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:06,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:06,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:06,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:06,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:06,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:06,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:06,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:06,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:06,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:06,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:06,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:06,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:06,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:06,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:06,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:06,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:06,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:06,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:06,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:06,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:34:06,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:34:06,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:34:06,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:34:06,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:34:06,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:34:06,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:34:06,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:34:06,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:34:06,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:34:06,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:34:06,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:34:06,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:34:06,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:34:06,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:06,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:06,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:06,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:34:06,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:06,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:06,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:06,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:06,164 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:06,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:06,164 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:06,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:06,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:06,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:06,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:06,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:06,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:06,166 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:06,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:06,166 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:06,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:06,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:06,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:06,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:06,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:06,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:06,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:06,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:06,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:06,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:06,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:06,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:06,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:34:06,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:06,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:06,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:06,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:06,461 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:06,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-15 01:34:06,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53bf21e0/0b3284afc9dd4ca89c1b941096fc962d/FLAGeb6d5ef58 [2019-10-15 01:34:06,978 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:06,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-15 01:34:06,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53bf21e0/0b3284afc9dd4ca89c1b941096fc962d/FLAGeb6d5ef58 [2019-10-15 01:34:07,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53bf21e0/0b3284afc9dd4ca89c1b941096fc962d [2019-10-15 01:34:07,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:07,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:07,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:07,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:07,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:07,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dba115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,355 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:07,371 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:07,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:07,573 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:07,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:07,612 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:07,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07 WrapperNode [2019-10-15 01:34:07,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:07,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:07,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:07,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:07,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... [2019-10-15 01:34:07,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:07,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:07,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:07,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:07,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:08,159 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:08,159 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 01:34:08,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:08 BoogieIcfgContainer [2019-10-15 01:34:08,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:08,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:08,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:08,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:08,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:07" (1/3) ... [2019-10-15 01:34:08,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bc4ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:08, skipping insertion in model container [2019-10-15 01:34:08,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:07" (2/3) ... [2019-10-15 01:34:08,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bc4ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:08, skipping insertion in model container [2019-10-15 01:34:08,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:08" (3/3) ... [2019-10-15 01:34:08,168 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-10-15 01:34:08,177 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:08,185 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:08,196 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:08,217 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:08,217 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:08,217 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:08,217 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:08,217 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:08,218 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:08,218 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:08,218 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:34:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:34:08,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:08,237 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:08,239 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:08,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2120380695, now seen corresponding path program 1 times [2019-10-15 01:34:08,251 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:08,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437401948] [2019-10-15 01:34:08,251 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:08,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:08,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:34:08,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437401948] [2019-10-15 01:34:08,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:08,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:08,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416460123] [2019-10-15 01:34:08,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:08,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:08,428 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:34:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:08,532 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:34:08,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:08,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:34:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:08,544 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:34:08,545 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:34:08,550 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 [2019-10-15 01:34:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:34:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:34:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:34:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-15 01:34:08,601 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-10-15 01:34:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:08,603 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-15 01:34:08,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-15 01:34:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:34:08,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:08,607 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:08,608 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1248295838, now seen corresponding path program 1 times [2019-10-15 01:34:08,610 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:08,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194013395] [2019-10-15 01:34:08,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:08,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:08,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194013395] [2019-10-15 01:34:08,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775860707] [2019-10-15 01:34:08,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:08,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,870 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765493382] [2019-10-15 01:34:08,937 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:08,937 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:08,961 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:08,970 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:08,970 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:09,126 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:10,268 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:10,302 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:10,308 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:10,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:10,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:10,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698404195] [2019-10-15 01:34:10,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:10,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:10,910 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 17 states. [2019-10-15 01:34:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:11,645 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2019-10-15 01:34:11,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:11,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-10-15 01:34:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:11,648 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:34:11,648 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:34:11,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:34:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-10-15 01:34:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:34:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-15 01:34:11,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-10-15 01:34:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:11,661 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-15 01:34:11,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-15 01:34:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:34:11,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,663 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,868 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1543679785, now seen corresponding path program 2 times [2019-10-15 01:34:11,869 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506840154] [2019-10-15 01:34:11,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:12,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506840154] [2019-10-15 01:34:12,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670743905] [2019-10-15 01:34:12,001 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 [2019-10-15 01:34:12,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:12,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:12,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:12,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:12,102 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:12,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427201918] [2019-10-15 01:34:12,164 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:12,164 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:12,164 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:12,165 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:12,165 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:12,187 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:12,842 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:12,855 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:12,859 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:13,844 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:13,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:13,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734516761] [2019-10-15 01:34:13,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:13,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:13,851 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 23 states. [2019-10-15 01:34:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:14,982 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2019-10-15 01:34:14,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:14,982 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-10-15 01:34:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:14,984 INFO L225 Difference]: With dead ends: 123 [2019-10-15 01:34:14,984 INFO L226 Difference]: Without dead ends: 89 [2019-10-15 01:34:14,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 25 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-15 01:34:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-10-15 01:34:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-15 01:34:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-10-15 01:34:15,010 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 40 [2019-10-15 01:34:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:15,010 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-10-15 01:34:15,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-10-15 01:34:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-15 01:34:15,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:15,015 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:15,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:15,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash 376036471, now seen corresponding path program 3 times [2019-10-15 01:34:15,222 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:15,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815737226] [2019-10-15 01:34:15,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:15,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:15,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:15,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815737226] [2019-10-15 01:34:15,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100562124] [2019-10-15 01:34:15,433 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 [2019-10-15 01:34:15,544 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:15,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:15,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:15,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:15,582 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:15,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588665526] [2019-10-15 01:34:15,830 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:15,831 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:15,831 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:15,831 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:15,832 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:15,853 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:16,378 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:16,385 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:16,388 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:17,612 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:17,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:17,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120050369] [2019-10-15 01:34:17,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:17,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:17,616 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 35 states. [2019-10-15 01:34:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:19,590 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2019-10-15 01:34:19,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:19,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2019-10-15 01:34:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:19,592 INFO L225 Difference]: With dead ends: 225 [2019-10-15 01:34:19,592 INFO L226 Difference]: Without dead ends: 161 [2019-10-15 01:34:19,595 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 153 SyntacticMatches, 55 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2932 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-15 01:34:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2019-10-15 01:34:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-15 01:34:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2019-10-15 01:34:19,620 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 76 [2019-10-15 01:34:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,620 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2019-10-15 01:34:19,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2019-10-15 01:34:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 01:34:19,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,625 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:19,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:19,828 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1663159223, now seen corresponding path program 4 times [2019-10-15 01:34:19,829 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:19,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280296724] [2019-10-15 01:34:19,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:20,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280296724] [2019-10-15 01:34:20,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111641031] [2019-10-15 01:34:20,335 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 [2019-10-15 01:34:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:20,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:20,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:21,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609291322] [2019-10-15 01:34:21,295 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:21,295 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:21,295 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:21,296 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:21,296 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:21,315 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:21,822 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:21,830 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:21,832 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:24,892 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:24,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:24,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932901105] [2019-10-15 01:34:24,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:24,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:24,898 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 59 states. [2019-10-15 01:34:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:30,359 INFO L93 Difference]: Finished difference Result 429 states and 584 transitions. [2019-10-15 01:34:30,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:30,359 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 148 [2019-10-15 01:34:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:30,361 INFO L225 Difference]: With dead ends: 429 [2019-10-15 01:34:30,361 INFO L226 Difference]: Without dead ends: 305 [2019-10-15 01:34:30,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 297 SyntacticMatches, 115 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10918 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-10-15 01:34:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 296. [2019-10-15 01:34:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-10-15 01:34:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2019-10-15 01:34:30,400 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 148 [2019-10-15 01:34:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:30,400 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2019-10-15 01:34:30,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2019-10-15 01:34:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-15 01:34:30,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:30,404 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:30,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:30,609 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1615525321, now seen corresponding path program 5 times [2019-10-15 01:34:30,610 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:30,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473635514] [2019-10-15 01:34:30,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:30,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:30,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2019-10-15 01:34:31,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473635514] [2019-10-15 01:34:31,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333637918] [2019-10-15 01:34:31,871 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