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/pr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:27,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:27,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:28,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:28,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:28,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:28,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:28,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:28,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:28,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:28,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:28,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:28,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:28,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:28,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:28,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:28,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:28,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:28,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:28,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:28,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:28,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:28,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:28,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:28,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:28,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:28,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:28,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:28,054 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 01:38:28,077 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:28,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:28,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:28,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:28,080 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:28,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:28,081 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:28,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:28,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:28,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:28,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:28,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:28,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:28,083 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:28,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:28,084 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:28,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:28,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:28,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:28,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:28,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:28,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:28,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:28,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:28,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:28,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:28,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:28,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:28,086 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 01:38:28,352 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:28,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:28,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:28,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:28,369 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:28,370 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr3.c [2019-10-15 01:38:28,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757d96ef3/8ee73978535e4a01a346bf4cdba64fc8/FLAGab53419e9 [2019-10-15 01:38:28,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:28,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr3.c [2019-10-15 01:38:28,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757d96ef3/8ee73978535e4a01a346bf4cdba64fc8/FLAGab53419e9 [2019-10-15 01:38:29,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757d96ef3/8ee73978535e4a01a346bf4cdba64fc8 [2019-10-15 01:38:29,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:29,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:29,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:29,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:29,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:29,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462d39e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29, skipping insertion in model container [2019-10-15 01:38:29,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,272 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:29,292 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:29,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:29,462 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:29,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:29,587 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:29,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29 WrapperNode [2019-10-15 01:38:29,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:29,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:29,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:29,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:29,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (1/1) ... [2019-10-15 01:38:29,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:29,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:29,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:29,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:29,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (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 01:38:29,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:29,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:29,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:29,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:29,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:29,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:30,184 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:30,185 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:38:30,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:30 BoogieIcfgContainer [2019-10-15 01:38:30,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:30,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:30,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:30,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:30,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:29" (1/3) ... [2019-10-15 01:38:30,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aa9212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:30, skipping insertion in model container [2019-10-15 01:38:30,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:29" (2/3) ... [2019-10-15 01:38:30,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aa9212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:30, skipping insertion in model container [2019-10-15 01:38:30,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:30" (3/3) ... [2019-10-15 01:38:30,197 INFO L109 eAbstractionObserver]: Analyzing ICFG pr3.c [2019-10-15 01:38:30,209 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:30,217 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:30,228 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:30,252 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:30,252 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:30,252 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:30,253 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:30,253 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:30,253 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:30,253 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:30,253 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:38:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:30,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:30,273 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:30,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1379838131, now seen corresponding path program 1 times [2019-10-15 01:38:30,286 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:30,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889731628] [2019-10-15 01:38:30,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:30,675 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 01:38:30,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889731628] [2019-10-15 01:38:30,678 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:30,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:38:30,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411274722] [2019-10-15 01:38:30,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:38:30,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:38:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:30,702 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:38:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:30,787 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-10-15 01:38:30,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:38:30,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:38:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:30,797 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:38:30,797 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:38:30,800 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 01:38:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:38:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:38:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:38:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 01:38:30,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-15 01:38:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:30,844 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 01:38:30,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:38:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 01:38:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:38:30,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:30,846 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:30,847 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1391156721, now seen corresponding path program 1 times [2019-10-15 01:38:30,848 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:30,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974935792] [2019-10-15 01:38:30,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:30,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:31,317 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 01:38:31,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974935792] [2019-10-15 01:38:31,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014006264] [2019-10-15 01:38:31,319 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 01:38:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:31,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:38:31,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:31,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:31,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:31,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:31,597 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:31,598 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:31,906 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2019-10-15 01:38:31,907 INFO L567 ElimStorePlain]: treesize reduction 123, result has 51.2 percent of original size [2019-10-15 01:38:31,917 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:31,919 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:31,921 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:31,923 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:31,925 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:31,951 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 35 [2019-10-15 01:38:31,952 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:32,054 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-10-15 01:38:32,055 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:32,055 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_47| vanished before elimination [2019-10-15 01:38:32,062 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,064 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,065 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,069 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,071 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,075 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,091 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2019-10-15 01:38:32,092 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:32,185 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:32,186 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-15 01:38:32,186 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-10-15 01:38:32,195 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,197 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,198 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,209 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2019-10-15 01:38:32,209 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:32,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:32,304 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,306 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,307 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,308 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:38:32,316 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2019-10-15 01:38:32,316 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:32,384 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:38:32,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-2 vars, End of recursive call: and 4 xjuncts. [2019-10-15 01:38:32,389 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:289, output treesize:143 [2019-10-15 01:38:32,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:38:32,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,675 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 01:38:32,675 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:32,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,790 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 75 treesize of output 71 [2019-10-15 01:38:32,797 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:32,797 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:32,818 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:32,819 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:32,825 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 53 treesize of output 49 [2019-10-15 01:38:32,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:32,828 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:32,842 INFO L567 ElimStorePlain]: treesize reduction 12, result has 61.3 percent of original size [2019-10-15 01:38:32,842 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,045 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 105 [2019-10-15 01:38:33,045 INFO L567 ElimStorePlain]: treesize reduction 43, result has 93.4 percent of original size [2019-10-15 01:38:33,054 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 75 treesize of output 71 [2019-10-15 01:38:33,059 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,060 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,066 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,067 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,074 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 53 treesize of output 49 [2019-10-15 01:38:33,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,076 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,088 INFO L567 ElimStorePlain]: treesize reduction 12, result has 61.3 percent of original size [2019-10-15 01:38:33,089 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,276 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2019-10-15 01:38:33,277 INFO L567 ElimStorePlain]: treesize reduction 5, result has 99.1 percent of original size [2019-10-15 01:38:33,284 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 103 treesize of output 97 [2019-10-15 01:38:33,289 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,289 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,296 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,296 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,301 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 84 treesize of output 78 [2019-10-15 01:38:33,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,306 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,324 INFO L567 ElimStorePlain]: treesize reduction 26, result has 35.0 percent of original size [2019-10-15 01:38:33,325 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,496 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2019-10-15 01:38:33,497 INFO L567 ElimStorePlain]: treesize reduction 57, result has 87.7 percent of original size [2019-10-15 01:38:33,508 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 98 treesize of output 92 [2019-10-15 01:38:33,511 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,512 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,519 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,519 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:38:33,523 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 84 treesize of output 78 [2019-10-15 01:38:33,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:38:33,529 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,540 INFO L567 ElimStorePlain]: treesize reduction 27, result has 22.9 percent of original size [2019-10-15 01:38:33,540 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,552 INFO L567 ElimStorePlain]: treesize reduction 308, result has 2.5 percent of original size [2019-10-15 01:38:33,552 INFO L464 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2019-10-15 01:38:33,552 INFO L464 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2019-10-15 01:38:33,553 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-10-15 01:38:33,553 INFO L464 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2019-10-15 01:38:33,553 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:38:33,553 INFO L221 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:712, output treesize:8 [2019-10-15 01:38:33,577 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 01:38:33,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539209762] [2019-10-15 01:38:33,608 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:38:33,608 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:33,615 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:33,627 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:33,628 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:33,763 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:34,108 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:34,134 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:34,161 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:34,702 WARN L191 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 212 [2019-10-15 01:38:34,727 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:34,751 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,041 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-10-15 01:38:36,586 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,761 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-15 01:38:36,784 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,805 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,825 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,964 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2019-10-15 01:38:36,984 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,003 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,022 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,163 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:38:37,180 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,198 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,279 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,353 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,463 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:38:37,660 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,674 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,686 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,757 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,770 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,782 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,844 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,857 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,870 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:37,923 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,034 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,051 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,063 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,111 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,255 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,349 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,457 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:38:38,477 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:38,482 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:38,978 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-10-15 01:38:39,166 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 29 [2019-10-15 01:38:39,358 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:39,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 11] total 29 [2019-10-15 01:38:39,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515087307] [2019-10-15 01:38:39,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:38:39,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:38:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:38:39,364 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 29 states. [2019-10-15 01:38:39,914 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2019-10-15 01:38:40,241 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-10-15 01:38:40,436 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-10-15 01:38:40,665 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-10-15 01:38:41,101 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-10-15 01:38:41,335 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:38:41,649 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2019-10-15 01:38:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:41,789 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-15 01:38:41,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:38:41,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 14 [2019-10-15 01:38:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:41,792 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:38:41,792 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:38:41,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:38:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:38:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-15 01:38:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:38:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-15 01:38:41,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2019-10-15 01:38:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:41,815 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-15 01:38:41,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:38:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-15 01:38:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 01:38:41,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:41,819 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:42,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:42,022 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1243584095, now seen corresponding path program 1 times [2019-10-15 01:38:42,023 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:42,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991048283] [2019-10-15 01:38:42,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:42,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:42,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:42,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991048283] [2019-10-15 01:38:42,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235993855] [2019-10-15 01:38:42,355 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 01:38:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:42,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:38:42,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:42,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:42,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769298433] [2019-10-15 01:38:42,776 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:38:42,776 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:42,776 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:42,777 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:42,777 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:42,816 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:38:43,314 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:43,561 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 229 [2019-10-15 01:38:43,928 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:44,112 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-10-15 01:38:44,134 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:44,760 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-10-15 01:38:45,025 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,339 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-10-15 01:38:45,354 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,378 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,401 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,515 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,530 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,548 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,653 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-15 01:38:45,670 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,686 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,701 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,797 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,810 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:45,823 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,063 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,074 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,086 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,249 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,303 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,314 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,323 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,367 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,377 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,387 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,472 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,543 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,553 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,561 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,594 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,693 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,942 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2019-10-15 01:38:46,977 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:46,984 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:47,422 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-10-15 01:38:47,756 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-10-15 01:38:48,257 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:48,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 13] total 35 [2019-10-15 01:38:48,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121998067] [2019-10-15 01:38:48,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:38:48,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:38:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:38:48,260 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 35 states. [2019-10-15 01:38:48,499 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-10-15 01:38:48,936 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-10-15 01:38:49,255 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-10-15 01:38:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:50,658 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-10-15 01:38:50,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:38:50,659 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2019-10-15 01:38:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:50,662 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:38:50,663 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:38:50,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=454, Invalid=2852, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:38:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:38:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-15 01:38:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 01:38:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-15 01:38:50,673 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 35 [2019-10-15 01:38:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:50,673 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-15 01:38:50,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:38:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-15 01:38:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:38:50,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:50,675 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:50,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:50,881 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1261021469, now seen corresponding path program 2 times [2019-10-15 01:38:50,882 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:50,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082570178] [2019-10-15 01:38:50,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:50,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:50,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:51,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082570178] [2019-10-15 01:38:51,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336515770] [2019-10-15 01:38:51,349 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 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 01:38:51,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:38:51,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:51,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-15 01:38:51,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:51,523 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:51,803 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2019-10-15 01:38:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:53,235 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:53,963 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2019-10-15 01:38:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:54,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936848363] [2019-10-15 01:38:54,142 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:38:54,142 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:54,143 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:54,143 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:54,143 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:54,192 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:54,422 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:54,936 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 229 [2019-10-15 01:38:55,914 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:56,188 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2019-10-15 01:38:56,696 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:56,819 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-10-15 01:38:57,510 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,648 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-10-15 01:38:57,664 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,679 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,695 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,800 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2019-10-15 01:38:57,814 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,830 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,847 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,953 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,965 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:57,978 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,073 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,087 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,104 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,221 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:38:58,380 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,395 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,408 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,478 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,490 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,502 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,568 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,578 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,588 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,639 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,646 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,658 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,732 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,817 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,864 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:58,949 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:59,216 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2019-10-15 01:38:59,243 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:59,247 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:59,791 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-10-15 01:39:00,217 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-10-15 01:39:00,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:39:00,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 44 [2019-10-15 01:39:00,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957611031] [2019-10-15 01:39:00,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:39:00,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:39:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:39:00,886 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 44 states. [2019-10-15 01:39:01,540 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2019-10-15 01:39:01,907 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2019-10-15 01:39:02,133 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-10-15 01:39:02,585 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2019-10-15 01:39:03,022 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2019-10-15 01:39:03,382 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-10-15 01:39:03,758 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-10-15 01:39:04,133 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-10-15 01:39:04,348 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-10-15 01:39:04,612 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-10-15 01:39:04,830 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-10-15 01:39:05,093 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-10-15 01:39:05,336 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2019-10-15 01:39:05,808 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2019-10-15 01:39:06,080 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-10-15 01:39:06,484 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-10-15 01:39:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:06,489 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:39:06,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:39:06,489 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2019-10-15 01:39:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:06,492 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:39:06,492 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 01:39:06,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=504, Invalid=4052, Unknown=0, NotChecked=0, Total=4556 [2019-10-15 01:39:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 01:39:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-10-15 01:39:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:39:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-15 01:39:06,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2019-10-15 01:39:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:06,507 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-15 01:39:06,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:39:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-15 01:39:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:39:06,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:06,509 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:06,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:06,710 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 783663437, now seen corresponding path program 3 times [2019-10-15 01:39:06,711 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:06,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041507824] [2019-10-15 01:39:06,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:39:07,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041507824] [2019-10-15 01:39:07,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779605585] [2019-10-15 01:39:07,234 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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