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-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:47,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:47,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:47,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:47,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:47,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:47,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:47,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:47,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:47,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:47,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:47,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:47,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:47,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:47,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:47,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:47,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:47,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:47,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:47,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:47,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:47,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:47,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:47,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:47,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:47,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:38:47,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:38:47,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:38:47,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:38:47,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:38:47,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:38:47,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:38:47,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:38:47,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:47,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:47,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:47,197 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 01:38:47,220 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:47,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:47,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:47,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:47,223 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:47,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:47,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:47,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:47,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:47,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:47,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:47,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:47,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:47,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:47,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:47,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:47,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:47,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:47,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:47,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:47,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:47,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:47,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:47,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:47,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:47,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:47,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:47,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:47,229 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 01:38:47,542 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:47,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:47,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:47,571 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:47,571 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:47,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2019-10-15 01:38:47,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12e74e00b/766e696f151b428b907bdfea82547952/FLAG6a05c2214 [2019-10-15 01:38:48,094 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:48,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2019-10-15 01:38:48,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12e74e00b/766e696f151b428b907bdfea82547952/FLAG6a05c2214 [2019-10-15 01:38:48,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12e74e00b/766e696f151b428b907bdfea82547952 [2019-10-15 01:38:48,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:48,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:48,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:48,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:48,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:48,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48, skipping insertion in model container [2019-10-15 01:38:48,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,561 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:48,575 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:48,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:48,747 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:48,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:48,777 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:48,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48 WrapperNode [2019-10-15 01:38:48,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:48,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:48,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:48,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:48,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (1/1) ... [2019-10-15 01:38:48,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:48,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:48,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:48,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:48,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (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 01:38:48,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:48,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:48,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:48,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:48,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:48,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:48,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:48,969 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:38:48,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:48,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:38:48,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:48,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:48,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:48,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:48,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:49,331 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:49,332 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:38:49,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:49 BoogieIcfgContainer [2019-10-15 01:38:49,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:49,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:49,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:49,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:49,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:48" (1/3) ... [2019-10-15 01:38:49,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1048db00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:49, skipping insertion in model container [2019-10-15 01:38:49,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:48" (2/3) ... [2019-10-15 01:38:49,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1048db00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:49, skipping insertion in model container [2019-10-15 01:38:49,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:49" (3/3) ... [2019-10-15 01:38:49,352 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2019-10-15 01:38:49,360 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:49,367 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:49,376 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:49,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:49,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:49,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:49,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:49,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:49,399 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:49,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:49,399 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:38:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:38:49,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:49,419 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:49,421 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1799181545, now seen corresponding path program 1 times [2019-10-15 01:38:49,433 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:49,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573392515] [2019-10-15 01:38:49,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:49,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:49,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:49,609 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 01:38:49,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573392515] [2019-10-15 01:38:49,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:49,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:49,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126449711] [2019-10-15 01:38:49,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:49,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:49,630 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:38:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:49,694 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-15 01:38:49,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:49,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:38:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:49,707 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:38:49,708 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:38:49,715 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 01:38:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:38:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:38:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:38:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 01:38:49,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-15 01:38:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:49,753 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 01:38:49,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 01:38:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:49,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:49,755 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:49,755 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash -623938133, now seen corresponding path program 1 times [2019-10-15 01:38:49,756 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:49,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603336926] [2019-10-15 01:38:49,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:49,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:49,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:49,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603336926] [2019-10-15 01:38:49,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247868297] [2019-10-15 01:38:49,872 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 01:38:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:49,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:38:49,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:50,015 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:50,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973902590] [2019-10-15 01:38:50,078 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:50,078 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:50,085 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:50,093 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:50,094 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:50,298 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:51,062 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-10-15 01:38:51,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:51,095 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:51,676 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2019-10-15 01:38:51,810 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2019-10-15 01:38:51,974 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2019-10-15 01:38:52,056 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:52,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:38:52,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891027688] [2019-10-15 01:38:52,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:38:52,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:38:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:38:52,062 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2019-10-15 01:38:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:52,736 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-15 01:38:52,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:38:52,737 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-10-15 01:38:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:52,738 INFO L225 Difference]: With dead ends: 36 [2019-10-15 01:38:52,739 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:38:52,741 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:38:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:38:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-10-15 01:38:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:38:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 01:38:52,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-15 01:38:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:52,755 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 01:38:52,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:38:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 01:38:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:38:52,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:52,757 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:52,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:52,962 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1448869271, now seen corresponding path program 2 times [2019-10-15 01:38:52,963 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:52,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771275202] [2019-10-15 01:38:52,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:52,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:52,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:53,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771275202] [2019-10-15 01:38:53,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980524942] [2019-10-15 01:38:53,228 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 01:38:53,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:38:53,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:53,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-15 01:38:53,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:54,944 WARN L191 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 42 [2019-10-15 01:38:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:55,072 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:55,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1680711081] [2019-10-15 01:38:55,272 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:55,272 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:55,272 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:55,273 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:55,273 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:55,334 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:55,740 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2019-10-15 01:38:55,756 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:55,766 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:56,364 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 31 [2019-10-15 01:38:56,667 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2019-10-15 01:38:56,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:56,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 32 [2019-10-15 01:38:56,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865636876] [2019-10-15 01:38:56,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:38:56,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:38:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:38:56,863 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 32 states. [2019-10-15 01:39:02,012 WARN L191 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2019-10-15 01:39:04,811 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-10-15 01:39:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:05,923 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-10-15 01:39:05,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:39:05,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 14 [2019-10-15 01:39:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:05,926 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:39:05,927 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:39:05,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:39:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:39:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-10-15 01:39:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:39:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 01:39:05,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2019-10-15 01:39:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:05,946 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 01:39:05,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:39:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 01:39:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:39:05,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:05,949 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:06,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:06,153 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1296602369, now seen corresponding path program 1 times [2019-10-15 01:39:06,154 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:06,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463690523] [2019-10-15 01:39:06,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:06,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463690523] [2019-10-15 01:39:06,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297039484] [2019-10-15 01:39:06,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:39:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:06,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-15 01:39:06,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:08,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:10,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1680529590] [2019-10-15 01:39:10,821 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:39:10,821 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:10,821 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:10,822 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:10,822 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:10,866 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:39:12,590 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2019-10-15 01:39:12,612 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:39:12,617 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:39:15,317 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2019-10-15 01:39:16,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:39:16,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 12] total 39 [2019-10-15 01:39:16,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422075091] [2019-10-15 01:39:16,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:39:16,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:39:16,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1354, Unknown=3, NotChecked=0, Total=1482 [2019-10-15 01:39:16,120 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 39 states. [2019-10-15 01:39:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:31,690 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-10-15 01:39:31,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:39:31,690 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 21 [2019-10-15 01:39:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:31,693 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:39:31,693 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:39:31,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=471, Invalid=4082, Unknown=3, NotChecked=0, Total=4556 [2019-10-15 01:39:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:39:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2019-10-15 01:39:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:39:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-15 01:39:31,717 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2019-10-15 01:39:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:31,717 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-15 01:39:31,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:39:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-15 01:39:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:39:31,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:31,720 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:31,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:31,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1478277397, now seen corresponding path program 2 times [2019-10-15 01:39:31,925 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:31,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774299143] [2019-10-15 01:39:31,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:31,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:31,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:32,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774299143] [2019-10-15 01:39:32,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819952506] [2019-10-15 01:39:32,078 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 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 01:39:32,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:39:32,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:39:32,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 01:39:32,150 INFO L279 TraceCheckSpWp]: Computing forward predicates...