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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:53,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:53,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:53,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:53,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:53,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:53,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:53,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:53,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:53,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:53,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:53,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:53,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:53,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:53,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:53,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:53,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:53,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:53,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:53,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:53,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:53,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:53,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:53,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:53,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:53,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:53,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:53,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:53,221 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 00:07:53,238 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:53,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:53,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:53,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:53,240 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:53,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:53,240 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:53,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:53,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:53,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:53,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:53,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:53,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:53,242 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:53,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:53,242 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:53,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:53,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:53,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:53,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:53,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:53,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:53,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:53,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:53,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:53,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:53,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:53,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:53,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:07:53,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:53,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:53,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:53,564 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:53,564 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:53,565 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-15 00:07:53,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5024014/bd49dd0136634f14bf3d98730eeb810d/FLAG5a21f7ec9 [2019-10-15 00:07:54,266 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:54,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-15 00:07:54,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5024014/bd49dd0136634f14bf3d98730eeb810d/FLAG5a21f7ec9 [2019-10-15 00:07:54,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5024014/bd49dd0136634f14bf3d98730eeb810d [2019-10-15 00:07:54,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:54,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:54,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:54,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:54,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:54,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:54" (1/1) ... [2019-10-15 00:07:54,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:54, skipping insertion in model container [2019-10-15 00:07:54,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:54" (1/1) ... [2019-10-15 00:07:54,476 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:54,554 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:55,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:55,571 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:55,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:55,945 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:55,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55 WrapperNode [2019-10-15 00:07:55,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:55,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:55,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:55,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:55,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:55,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (1/1) ... [2019-10-15 00:07:56,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:56,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:56,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:56,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:56,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (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 00:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:56,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:56,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:59,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:59,583 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:59,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:59 BoogieIcfgContainer [2019-10-15 00:07:59,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:59,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:59,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:59,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:59,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:54" (1/3) ... [2019-10-15 00:07:59,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688ce63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:59, skipping insertion in model container [2019-10-15 00:07:59,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:55" (2/3) ... [2019-10-15 00:07:59,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688ce63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:59, skipping insertion in model container [2019-10-15 00:07:59,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:59" (3/3) ... [2019-10-15 00:07:59,593 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2019-10-15 00:07:59,604 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:59,613 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:59,626 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:59,664 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:59,665 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:59,665 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:59,665 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:59,665 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:59,666 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:59,666 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:59,666 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 00:07:59,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:59,713 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:59,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 567183525, now seen corresponding path program 1 times [2019-10-15 00:07:59,729 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:59,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219225594] [2019-10-15 00:07:59,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:59,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:59,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:00,121 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 00:08:00,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219225594] [2019-10-15 00:08:00,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:00,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:00,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218317509] [2019-10-15 00:08:00,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:00,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:00,153 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:08:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:05,288 INFO L93 Difference]: Finished difference Result 1497 states and 2757 transitions. [2019-10-15 00:08:05,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:05,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-15 00:08:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:05,320 INFO L225 Difference]: With dead ends: 1497 [2019-10-15 00:08:05,320 INFO L226 Difference]: Without dead ends: 993 [2019-10-15 00:08:05,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-10-15 00:08:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-10-15 00:08:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-10-15 00:08:05,435 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 63 [2019-10-15 00:08:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:05,436 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-10-15 00:08:05,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-10-15 00:08:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:08:05,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:05,442 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:05,443 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash 550015554, now seen corresponding path program 1 times [2019-10-15 00:08:05,443 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:05,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647207228] [2019-10-15 00:08:05,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:05,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647207228] [2019-10-15 00:08:05,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:05,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:05,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824602261] [2019-10-15 00:08:05,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:05,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:05,589 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-10-15 00:08:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:10,637 INFO L93 Difference]: Finished difference Result 2602 states and 3858 transitions. [2019-10-15 00:08:10,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:10,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-15 00:08:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:10,651 INFO L225 Difference]: With dead ends: 2602 [2019-10-15 00:08:10,651 INFO L226 Difference]: Without dead ends: 1926 [2019-10-15 00:08:10,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2019-10-15 00:08:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1924. [2019-10-15 00:08:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2019-10-15 00:08:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2563 transitions. [2019-10-15 00:08:10,738 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2563 transitions. Word has length 132 [2019-10-15 00:08:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:10,740 INFO L462 AbstractCegarLoop]: Abstraction has 1924 states and 2563 transitions. [2019-10-15 00:08:10,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2563 transitions. [2019-10-15 00:08:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-15 00:08:10,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:10,754 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:10,754 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2042933374, now seen corresponding path program 1 times [2019-10-15 00:08:10,756 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:10,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051354481] [2019-10-15 00:08:10,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 115 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 00:08:11,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051354481] [2019-10-15 00:08:11,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350315393] [2019-10-15 00:08:11,076 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 00:08:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:11,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 00:08:11,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 00:08:11,388 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 116 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:11,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1359611190] [2019-10-15 00:08:11,611 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 238 [2019-10-15 00:08:11,657 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:11,657 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:08:14,368 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 00:08:15,039 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:08:15,042 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 452 root evaluator evaluations with a maximum evaluation depth of 13. Performed 452 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:08:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:15,047 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:08:16,129 INFO L227 lantSequenceWeakener]: Weakened 234 states. On average, predicates are now at 78.14% of their original sizes. [2019-10-15 00:08:16,129 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:08:16,215 INFO L553 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2019-10-15 00:08:16,215 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:08:16,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:08:16,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 7, 8] total 25 [2019-10-15 00:08:16,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021045237] [2019-10-15 00:08:16,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:08:16,218 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:16,218 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:08:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:08:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:08:16,219 INFO L87 Difference]: Start difference. First operand 1924 states and 2563 transitions. Second operand 11 states.