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/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:09,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:09,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:09,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:09,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:09,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:09,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:09,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:09,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:09,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:09,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:09,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:09,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:09,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:09,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:09,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:09,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:09,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:09,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:09,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:09,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:09,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:09,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:09,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:09,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:09,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:09,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:09,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:09,281 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 01:38:09,296 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:09,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:09,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:09,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:09,298 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:09,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:09,298 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:09,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:09,299 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:09,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:09,300 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:09,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:09,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:09,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:09,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:09,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:09,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:09,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:09,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:09,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:09,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:09,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:09,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:09,303 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 01:38:09,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:09,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:09,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:09,611 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:09,612 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:09,612 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr3.c [2019-10-15 01:38:09,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157dbd3f/03340731659244598cfe1d19aeac744c/FLAGbc657d1c8 [2019-10-15 01:38:10,210 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:10,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c [2019-10-15 01:38:10,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157dbd3f/03340731659244598cfe1d19aeac744c/FLAGbc657d1c8 [2019-10-15 01:38:10,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9157dbd3f/03340731659244598cfe1d19aeac744c [2019-10-15 01:38:10,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:10,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:10,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:10,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:10,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:10,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:10,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665abbeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10, skipping insertion in model container [2019-10-15 01:38:10,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:10,655 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:10,680 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:10,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:10,880 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:10,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:10,921 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:10,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10 WrapperNode [2019-10-15 01:38:10,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:10,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:10,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:10,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:11,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (1/1) ... [2019-10-15 01:38:11,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:11,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:11,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:11,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:11,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (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 01:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-10-15 01:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:11,567 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:11,567 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:38:11,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:11 BoogieIcfgContainer [2019-10-15 01:38:11,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:11,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:11,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:11,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:11,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:10" (1/3) ... [2019-10-15 01:38:11,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8bdd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:11, skipping insertion in model container [2019-10-15 01:38:11,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:10" (2/3) ... [2019-10-15 01:38:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8bdd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:11, skipping insertion in model container [2019-10-15 01:38:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:11" (3/3) ... [2019-10-15 01:38:11,578 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr3.c [2019-10-15 01:38:11,588 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:11,601 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:11,613 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:11,646 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:11,647 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:11,647 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:11,647 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:11,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:11,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:11,648 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:11,648 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-15 01:38:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:11,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:11,674 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:11,676 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash 557815037, now seen corresponding path program 1 times [2019-10-15 01:38:11,689 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:11,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101911240] [2019-10-15 01:38:11,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:11,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:11,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:12,051 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 01:38:12,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101911240] [2019-10-15 01:38:12,053 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:12,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:38:12,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467199619] [2019-10-15 01:38:12,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:38:12,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:38:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:12,075 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2019-10-15 01:38:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:12,228 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2019-10-15 01:38:12,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:38:12,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:38:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:12,240 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:38:12,241 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:38:12,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:38:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2019-10-15 01:38:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:38:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-15 01:38:12,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2019-10-15 01:38:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:12,295 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-15 01:38:12,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:38:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-15 01:38:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:38:12,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:12,298 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 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 01:38:12,298 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 886321416, now seen corresponding path program 1 times [2019-10-15 01:38:12,299 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:12,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353987807] [2019-10-15 01:38:12,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:12,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:12,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:12,905 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2019-10-15 01:38:13,100 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2019-10-15 01:38:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:38:13,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353987807] [2019-10-15 01:38:13,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578610957] [2019-10-15 01:38:13,339 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 01:38:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:13,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:38:13,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:13,586 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2019-10-15 01:38:13,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,618 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:13,627 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-10-15 01:38:13,628 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,661 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:13,662 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-15 01:38:13,663 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:46 [2019-10-15 01:38:13,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:13,741 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,750 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2019-10-15 01:38:13,751 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,759 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,765 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2019-10-15 01:38:13,766 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,802 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:13,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-15 01:38:13,805 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:72 [2019-10-15 01:38:13,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:13,885 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,887 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,888 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,901 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2019-10-15 01:38:13,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,908 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,909 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:13,918 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2019-10-15 01:38:13,921 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:13,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:13,957 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-15 01:38:13,958 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:78, output treesize:64 [2019-10-15 01:38:14,087 INFO L341 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2019-10-15 01:38:14,088 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2019-10-15 01:38:14,089 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:14,096 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:14,096 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:14,097 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:8 [2019-10-15 01:38:14,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:38:14,176 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:14,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:14,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:14,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:14,372 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2019-10-15 01:38:14,381 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2019-10-15 01:38:14,381 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-10-15 01:38:14,395 INFO L567 ElimStorePlain]: treesize reduction 15, result has 44.4 percent of original size [2019-10-15 01:38:14,396 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:14,406 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:14,410 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-10-15 01:38:14,424 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2019-10-15 01:38:14,425 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-10-15 01:38:14,435 INFO L567 ElimStorePlain]: treesize reduction 10, result has 56.5 percent of original size [2019-10-15 01:38:14,435 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-10-15 01:38:14,448 INFO L567 ElimStorePlain]: treesize reduction 12, result has 52.0 percent of original size [2019-10-15 01:38:14,449 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-15 01:38:14,449 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:37, output treesize:13 [2019-10-15 01:38:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:38:14,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462582747] [2019-10-15 01:38:14,539 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:38:14,540 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:14,546 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:14,555 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:14,555 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:14,679 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:14,960 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:15,038 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:29,236 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:38:29,246 INFO L199 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 58 for LOIs [2019-10-15 01:38:29,258 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:29,261 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:29,838 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2019-10-15 01:38:30,904 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-10-15 01:38:31,259 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2019-10-15 01:38:31,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:31,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 19] total 41 [2019-10-15 01:38:31,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925403782] [2019-10-15 01:38:31,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:38:31,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:38:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:38:31,434 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 41 states. [2019-10-15 01:38:31,781 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2019-10-15 01:38:32,184 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2019-10-15 01:38:32,561 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2019-10-15 01:38:32,864 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2019-10-15 01:38:33,230 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2019-10-15 01:38:33,428 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2019-10-15 01:38:33,736 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2019-10-15 01:38:34,491 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2019-10-15 01:38:34,777 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2019-10-15 01:38:35,103 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2019-10-15 01:38:35,783 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2019-10-15 01:38:36,153 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2019-10-15 01:38:36,831 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2019-10-15 01:38:37,099 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-10-15 01:38:37,468 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-10-15 01:38:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:37,473 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2019-10-15 01:38:37,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:38:37,474 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 26 [2019-10-15 01:38:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:37,478 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:38:37,478 INFO L226 Difference]: Without dead ends: 49 [2019-10-15 01:38:37,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=603, Invalid=4653, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:38:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-15 01:38:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2019-10-15 01:38:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:38:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-10-15 01:38:37,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2019-10-15 01:38:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:37,494 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-10-15 01:38:37,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:38:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-10-15 01:38:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 01:38:37,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:37,496 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:37,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:37,704 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:37,704 INFO L82 PathProgramCache]: Analyzing trace with hash -767872105, now seen corresponding path program 1 times [2019-10-15 01:38:37,704 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:37,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096018732] [2019-10-15 01:38:37,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:37,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:37,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:38:38,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096018732] [2019-10-15 01:38:38,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137056022] [2019-10-15 01:38:38,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:38:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:38,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:38:38,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:38:38,401 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:38:38,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672124364] [2019-10-15 01:38:38,555 INFO L162 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-10-15 01:38:38,555 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:38,555 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:38,555 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:38,556 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:38,581 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:38,946 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:39,001 WARN L225 Elim1Store]: Array PQE input equivalent to false