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-crafted/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:29:41,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:29:41,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:29:41,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:29:41,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:29:41,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:29:41,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:29:41,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:29:41,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:29:41,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:29:41,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:29:41,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:29:41,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:29:41,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:29:41,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:29:41,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:29:41,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:29:41,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:29:41,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:29:41,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:29:41,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:29:41,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:29:41,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:29:41,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:29:41,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:29:41,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:29:41,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:29:41,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:29:41,144 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 01:29:41,158 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:29:41,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:29:41,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:29:41,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:29:41,160 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:29:41,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:29:41,160 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:29:41,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:29:41,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:29:41,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:29:41,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:29:41,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:29:41,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:29:41,162 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:29:41,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:29:41,162 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:29:41,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:29:41,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:29:41,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:29:41,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:29:41,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:29:41,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:29:41,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:29:41,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:29:41,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:29:41,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:29:41,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:29:41,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:29:41,165 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 01:29:41,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:29:41,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:29:41,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:29:41,508 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:29:41,509 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:29:41,510 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor3.i [2019-10-15 01:29:41,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295840520/060a33f4ea814c99896b594f0c0a7495/FLAG4854f5616 [2019-10-15 01:29:41,997 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:29:41,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor3.i [2019-10-15 01:29:42,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295840520/060a33f4ea814c99896b594f0c0a7495/FLAG4854f5616 [2019-10-15 01:29:42,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295840520/060a33f4ea814c99896b594f0c0a7495 [2019-10-15 01:29:42,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:29:42,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:29:42,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:29:42,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:29:42,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14dc86bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42, skipping insertion in model container [2019-10-15 01:29:42,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,393 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:29:42,410 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:29:42,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:29:42,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,754 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:29:42,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42 WrapperNode [2019-10-15 01:29:42,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:29:42,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:29:42,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:29:42,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:29:42,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:29:42,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (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 01:29:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:29:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:29:42,849 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-10-15 01:29:42,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:29:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:29:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:29:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-10-15 01:29:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:29:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:29:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:29:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:29:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:29:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:29:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:29:43,255 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:29:43,255 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:29:43,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43 BoogieIcfgContainer [2019-10-15 01:29:43,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:29:43,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:29:43,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:29:43,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:29:43,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:29:42" (1/3) ... [2019-10-15 01:29:43,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7340a33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (2/3) ... [2019-10-15 01:29:43,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7340a33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43" (3/3) ... [2019-10-15 01:29:43,265 INFO L109 eAbstractionObserver]: Analyzing ICFG bor3.i [2019-10-15 01:29:43,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:29:43,283 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:29:43,293 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:29:43,315 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:29:43,315 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:29:43,316 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:29:43,316 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:29:43,316 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:29:43,316 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:29:43,316 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:29:43,317 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:29:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:29:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:29:43,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,342 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:43,344 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-10-15 01:29:43,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526854597] [2019-10-15 01:29:43,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:29:43,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526854597] [2019-10-15 01:29:43,561 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:43,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:43,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724334966] [2019-10-15 01:29:43,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:43,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:43,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:43,585 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:29:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:43,621 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:29:43,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:43,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:29:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:43,635 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:29:43,635 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:29:43,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:29:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:29:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:29:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:29:43,707 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:29:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:43,708 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:29:43,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:29:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:29:43,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,714 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:43,715 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1232729663, now seen corresponding path program 1 times [2019-10-15 01:29:43,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963816939] [2019-10-15 01:29:43,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:43,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963816939] [2019-10-15 01:29:43,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878799055] [2019-10-15 01:29:43,892 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 01:29:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:29:43,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:44,027 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:29:44,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:29:44,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:29:44,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407645410] [2019-10-15 01:29:44,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:29:44,068 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:29:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,078 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:29:44,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:29:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,080 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:29:44,080 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:29:44,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:29:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:29:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:29:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:29:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:29:44,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:29:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,088 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:29:44,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:29:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:29:44,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,090 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:44,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:44,294 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 638962104, now seen corresponding path program 1 times [2019-10-15 01:29:44,295 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016300607] [2019-10-15 01:29:44,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016300607] [2019-10-15 01:29:44,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:44,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:44,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703077515] [2019-10-15 01:29:44,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:44,412 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:29:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,428 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:29:44,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:29:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,430 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:29:44,430 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:29:44,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:29:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:29:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:29:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:29:44,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:29:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,438 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:29:44,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:29:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:29:44,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,440 INFO L380 BasicCegarLoop]: trace histogram [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 01:29:44,440 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -454929733, now seen corresponding path program 1 times [2019-10-15 01:29:44,441 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783118389] [2019-10-15 01:29:44,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783118389] [2019-10-15 01:29:44,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070430830] [2019-10-15 01:29:44,521 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 01:29:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:29:44,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,620 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:44,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803059821] [2019-10-15 01:29:44,687 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:44,687 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:44,699 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:44,710 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:44,710 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:44,923 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:47,058 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:47,116 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:47,121 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:47,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:47,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:29:47,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45314625] [2019-10-15 01:29:47,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:29:47,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:29:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:29:47,502 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:29:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:48,619 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:29:48,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:29:48,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:29:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:48,620 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:29:48,620 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:29:48,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:29:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:29:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:29:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:29:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:29:48,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:29:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:48,629 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:29:48,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:29:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:29:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:29:48,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:48,630 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:48,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:48,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:48,834 INFO L82 PathProgramCache]: Analyzing trace with hash 545849657, now seen corresponding path program 2 times [2019-10-15 01:29:48,835 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:48,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468812062] [2019-10-15 01:29:48,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:48,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:48,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:29:48,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468812062] [2019-10-15 01:29:48,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109546237] [2019-10-15 01:29:48,931 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 01:29:49,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:29:49,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:29:49,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:29:49,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:29:49,020 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:29:49,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627819106] [2019-10-15 01:29:49,055 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:49,055 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:49,056 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:49,056 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:49,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:49,084 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:50,629 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:50,661 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:50,666 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:51,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:51,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:29:51,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697374483] [2019-10-15 01:29:51,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:29:51,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:29:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:29:51,067 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:29:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:52,005 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:29:52,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:29:52,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:29:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:52,006 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:29:52,006 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:29:52,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:29:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:29:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:29:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:29:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:29:52,015 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:29:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:52,015 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:29:52,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:29:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:29:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:29:52,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:52,017 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:52,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:52,226 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash -633329328, now seen corresponding path program 3 times [2019-10-15 01:29:52,227 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:52,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23198925] [2019-10-15 01:29:52,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:52,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:52,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:52,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23198925] [2019-10-15 01:29:52,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274075280] [2019-10-15 01:29:52,315 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 [2019-10-15 01:29:52,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:29:52,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:29:52,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:29:52,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:52,459 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:52,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852750444] [2019-10-15 01:29:52,555 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:52,560 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:52,560 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:52,561 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:52,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:52,589 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:54,135 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:54,163 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:54,168 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:54,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:54,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:29:54,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831591080] [2019-10-15 01:29:54,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:29:54,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:29:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:29:54,648 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:29:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:55,558 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:29:55,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:29:55,559 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:29:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:55,560 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:29:55,560 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:29:55,562 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:29:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:29:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:29:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:29:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:29:55,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:29:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:55,578 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:29:55,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:29:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:29:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:29:55,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:55,582 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:55,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:55,786 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:55,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1897195758, now seen corresponding path program 4 times [2019-10-15 01:29:55,787 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:55,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389991883] [2019-10-15 01:29:55,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:55,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:55,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:55,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389991883] [2019-10-15 01:29:55,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916301972] [2019-10-15 01:29:55,952 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:56,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:29:56,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:56,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:56,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062850746] [2019-10-15 01:29:56,489 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:56,489 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:56,489 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:56,490 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:56,490 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:56,515 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:57,770 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:57,789 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:57,792 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:58,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:58,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:29:58,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462022450] [2019-10-15 01:29:58,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:29:58,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:29:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:29:58,234 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:29:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:59,694 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:29:59,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:29:59,694 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:29:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:59,695 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:29:59,695 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:29:59,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 01:29:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:29:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:29:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:29:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:29:59,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:29:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:59,713 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:29:59,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:29:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:29:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:29:59,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:59,718 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:29:59,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:59,933 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash -755090094, now seen corresponding path program 5 times [2019-10-15 01:29:59,934 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:59,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527598648] [2019-10-15 01:29:59,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:59,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:59,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:00,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527598648] [2019-10-15 01:30:00,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672922621] [2019-10-15 01:30:00,361 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:00,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:00,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:00,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:00,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 01:30:00,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 01:30:00,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652110544] [2019-10-15 01:30:00,625 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:00,625 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:00,626 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:00,626 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:00,626 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:00,643 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:01,920 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:30:01,940 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:01,942 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:02,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:02,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:02,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118700233] [2019-10-15 01:30:02,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:02,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:02,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:02,452 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:04,733 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:04,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:04,733 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:04,735 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:04,735 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:04,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:30:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:04,746 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:04,746 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:04,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:04,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:04,748 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:04,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:04,951 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1616126463, now seen corresponding path program 6 times [2019-10-15 01:30:04,952 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:04,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52681188] [2019-10-15 01:30:04,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:04,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:04,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:05,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52681188] [2019-10-15 01:30:05,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954894543] [2019-10-15 01:30:05,374 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:05,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:05,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:05,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:05,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:05,626 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:06,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739631831] [2019-10-15 01:30:06,557 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:06,557 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:06,558 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:06,558 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:06,558 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:06,577 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:07,793 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:30:07,817 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:07,819 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:08,397 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:08,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:08,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233942539] [2019-10-15 01:30:08,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:08,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:08,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:08,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:08,401 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:11,786 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:11,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:11,786 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:11,787 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:11,787 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:11,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:30:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:11,802 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:11,802 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:11,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:11,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:11,804 INFO L380 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:12,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:12,009 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1754158397, now seen corresponding path program 7 times [2019-10-15 01:30:12,010 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:12,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105679555] [2019-10-15 01:30:12,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:12,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:12,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:13,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105679555] [2019-10-15 01:30:13,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137348726] [2019-10-15 01:30:13,467 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:13,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:13,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:13,758 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:17,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661483408] [2019-10-15 01:30:17,292 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:17,292 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:17,293 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:17,293 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:17,293 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:17,310 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs