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/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:03,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:03,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:03,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:03,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:03,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:03,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:03,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:03,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:03,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:03,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:03,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:03,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:03,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:03,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:03,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:03,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:03,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:03,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:03,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:03,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:03,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:03,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:03,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:03,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:03,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:03,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:03,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:03,816 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 00:08:03,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:03,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:03,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:03,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:03,838 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:03,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:03,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:03,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:03,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:03,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:03,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:03,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:03,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:03,841 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:03,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:03,842 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:03,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:03,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:03,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:03,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:03,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:03,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:03,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:03,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:03,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:03,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:03,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:03,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:03,844 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 00:08:04,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:04,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:04,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:04,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:04,148 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:04,149 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-15 00:08:04,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57c9cb99/389ffb1fede1451eab59b864549943be/FLAG93cdcd64f [2019-10-15 00:08:04,922 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:04,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-15 00:08:04,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57c9cb99/389ffb1fede1451eab59b864549943be/FLAG93cdcd64f [2019-10-15 00:08:05,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57c9cb99/389ffb1fede1451eab59b864549943be [2019-10-15 00:08:05,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:05,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:05,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:05,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:05,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:05,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:05" (1/1) ... [2019-10-15 00:08:05,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f877d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:05, skipping insertion in model container [2019-10-15 00:08:05,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:05" (1/1) ... [2019-10-15 00:08:05,141 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:05,206 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:06,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:06,170 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:06,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:06,650 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:06,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06 WrapperNode [2019-10-15 00:08:06,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:06,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:06,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:06,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:06,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:06,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:06,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:06,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:06,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (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 00:08:06,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:06,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:06,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:06,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:06,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:06,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:06,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:06,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:06,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:06,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:09,325 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:09,325 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:09,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:09 BoogieIcfgContainer [2019-10-15 00:08:09,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:09,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:09,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:09,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:09,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:05" (1/3) ... [2019-10-15 00:08:09,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cc95e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:09, skipping insertion in model container [2019-10-15 00:08:09,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06" (2/3) ... [2019-10-15 00:08:09,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cc95e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:09, skipping insertion in model container [2019-10-15 00:08:09,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:09" (3/3) ... [2019-10-15 00:08:09,341 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-15 00:08:09,352 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:09,361 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:09,373 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:09,417 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:09,417 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:09,417 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:09,418 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:09,418 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:09,418 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:09,418 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:09,418 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 00:08:09,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:09,467 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] [2019-10-15 00:08:09,469 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-10-15 00:08:09,486 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:09,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309575682] [2019-10-15 00:08:09,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:09,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:09,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:09,869 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 00:08:09,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309575682] [2019-10-15 00:08:09,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:09,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:09,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139113065] [2019-10-15 00:08:09,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:09,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:09,897 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:16,158 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:16,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:16,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-10-15 00:08:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:16,183 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:16,183 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:16,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 00:08:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-10-15 00:08:16,292 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 60 [2019-10-15 00:08:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:16,292 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-10-15 00:08:16,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-10-15 00:08:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 00:08:16,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:16,299 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, 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 00:08:16,300 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-10-15 00:08:16,300 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:16,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765419950] [2019-10-15 00:08:16,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:16,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765419950] [2019-10-15 00:08:16,533 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:16,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:16,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751112025] [2019-10-15 00:08:16,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:16,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:16,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:16,536 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-10-15 00:08:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:23,777 INFO L93 Difference]: Finished difference Result 2806 states and 4911 transitions. [2019-10-15 00:08:23,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:08:23,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-15 00:08:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:23,798 INFO L225 Difference]: With dead ends: 2806 [2019-10-15 00:08:23,799 INFO L226 Difference]: Without dead ends: 2130 [2019-10-15 00:08:23,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:08:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2019-10-15 00:08:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2087. [2019-10-15 00:08:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-10-15 00:08:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-10-15 00:08:23,910 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 135 [2019-10-15 00:08:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:23,911 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-10-15 00:08:23,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-10-15 00:08:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:08:23,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:23,919 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, 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 00:08:23,922 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-10-15 00:08:23,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:23,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483657627] [2019-10-15 00:08:23,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:24,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483657627] [2019-10-15 00:08:24,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:24,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:24,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822500375] [2019-10-15 00:08:24,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:24,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:24,108 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-10-15 00:08:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:27,077 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-10-15 00:08:27,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:27,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-15 00:08:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:27,108 INFO L225 Difference]: With dead ends: 5623 [2019-10-15 00:08:27,116 INFO L226 Difference]: Without dead ends: 3542 [2019-10-15 00:08:27,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-10-15 00:08:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-10-15 00:08:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-10-15 00:08:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5695 transitions. [2019-10-15 00:08:27,286 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5695 transitions. Word has length 139 [2019-10-15 00:08:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:27,287 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5695 transitions. [2019-10-15 00:08:27,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5695 transitions. [2019-10-15 00:08:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 00:08:27,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:27,300 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:27,300 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1876426643, now seen corresponding path program 1 times [2019-10-15 00:08:27,301 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:27,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344780756] [2019-10-15 00:08:27,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:27,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:27,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:27,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344780756] [2019-10-15 00:08:27,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:27,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:27,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332780548] [2019-10-15 00:08:27,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:27,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:27,501 INFO L87 Difference]: Start difference. First operand 3503 states and 5695 transitions. Second operand 6 states. [2019-10-15 00:08:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:30,250 INFO L93 Difference]: Finished difference Result 8509 states and 14335 transitions. [2019-10-15 00:08:30,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:30,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-10-15 00:08:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:30,290 INFO L225 Difference]: With dead ends: 8509 [2019-10-15 00:08:30,290 INFO L226 Difference]: Without dead ends: 5012 [2019-10-15 00:08:30,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-10-15 00:08:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4965. [2019-10-15 00:08:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4965 states. [2019-10-15 00:08:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 7684 transitions. [2019-10-15 00:08:30,568 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 7684 transitions. Word has length 175 [2019-10-15 00:08:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:30,570 INFO L462 AbstractCegarLoop]: Abstraction has 4965 states and 7684 transitions. [2019-10-15 00:08:30,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 7684 transitions. [2019-10-15 00:08:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-15 00:08:30,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:30,577 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, 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] [2019-10-15 00:08:30,577 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1318797007, now seen corresponding path program 1 times [2019-10-15 00:08:30,578 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:30,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74518713] [2019-10-15 00:08:30,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:30,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:30,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:30,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74518713] [2019-10-15 00:08:30,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564182768] [2019-10-15 00:08:30,763 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 00:08:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:30,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:08:30,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-15 00:08:31,079 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:31,242 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:31,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 00:08:31,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122396000] [2019-10-15 00:08:31,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:31,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:08:31,244 INFO L87 Difference]: Start difference. First operand 4965 states and 7684 transitions. Second operand 5 states. [2019-10-15 00:08:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:33,942 INFO L93 Difference]: Finished difference Result 11032 states and 17418 transitions. [2019-10-15 00:08:33,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:08:33,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-10-15 00:08:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:33,977 INFO L225 Difference]: With dead ends: 11032 [2019-10-15 00:08:33,978 INFO L226 Difference]: Without dead ends: 6073 [2019-10-15 00:08:33,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 442 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:08:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6073 states. [2019-10-15 00:08:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6073 to 5682. [2019-10-15 00:08:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5682 states. [2019-10-15 00:08:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5682 states to 5682 states and 8063 transitions. [2019-10-15 00:08:34,185 INFO L78 Accepts]: Start accepts. Automaton has 5682 states and 8063 transitions. Word has length 224 [2019-10-15 00:08:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:34,186 INFO L462 AbstractCegarLoop]: Abstraction has 5682 states and 8063 transitions. [2019-10-15 00:08:34,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5682 states and 8063 transitions. [2019-10-15 00:08:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-15 00:08:34,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:34,191 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, 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] [2019-10-15 00:08:34,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:34,406 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-10-15 00:08:34,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:34,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990310132] [2019-10-15 00:08:34,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:34,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:34,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-15 00:08:34,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990310132] [2019-10-15 00:08:34,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085811836] [2019-10-15 00:08:34,689 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 00:08:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:34,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:34,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:34,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:35,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [20511501] [2019-10-15 00:08:35,157 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 235 [2019-10-15 00:08:35,217 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:35,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)