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/Problem01_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:09,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:09,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:09,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:09,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:09,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:09,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:10,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:10,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:10,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:10,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:10,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:10,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:10,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:10,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:10,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:10,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:10,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:10,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:10,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:10,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:10,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:10,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:10,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:10,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:10,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:10,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:10,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:10,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:10,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:10,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:10,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:10,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:10,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:10,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:10,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:10,061 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 [2019-10-14 23:54:10,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:10,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:10,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:10,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:10,090 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:10,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:10,091 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:10,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:10,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:10,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:10,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:10,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:10,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:10,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:10,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:10,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:10,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:10,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:10,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:10,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:10,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:10,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:10,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:10,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:10,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:10,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:10,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:10,095 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 [2019-10-14 23:54:10,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:10,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:10,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:10,416 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:10,417 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:10,418 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label37.c [2019-10-14 23:54:10,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016370332/468e5d28156445689078884373e324d0/FLAGda3783ac8 [2019-10-14 23:54:11,125 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:11,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label37.c [2019-10-14 23:54:11,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016370332/468e5d28156445689078884373e324d0/FLAGda3783ac8 [2019-10-14 23:54:11,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016370332/468e5d28156445689078884373e324d0 [2019-10-14 23:54:11,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:11,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:11,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:11,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:11,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:11,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:11" (1/1) ... [2019-10-14 23:54:11,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f39b728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:11, skipping insertion in model container [2019-10-14 23:54:11,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:11" (1/1) ... [2019-10-14 23:54:11,411 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:11,478 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:12,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:12,008 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:12,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:12,167 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:12,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12 WrapperNode [2019-10-14 23:54:12,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:12,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:12,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:12,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:12,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:12,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:12,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:12,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:12,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (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 [2019-10-14 23:54:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:12,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:12,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:12,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:12,421 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:14,093 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:14,093 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:14,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:14 BoogieIcfgContainer [2019-10-14 23:54:14,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:14,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:14,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:14,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:14,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:11" (1/3) ... [2019-10-14 23:54:14,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed8347b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:14, skipping insertion in model container [2019-10-14 23:54:14,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12" (2/3) ... [2019-10-14 23:54:14,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed8347b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:14, skipping insertion in model container [2019-10-14 23:54:14,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:14" (3/3) ... [2019-10-14 23:54:14,105 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label37.c [2019-10-14 23:54:14,116 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:14,125 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:14,137 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:14,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:14,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:14,171 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:14,171 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:14,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:14,172 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:14,172 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:14,172 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 23:54:14,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:14,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:14,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1092132023, now seen corresponding path program 1 times [2019-10-14 23:54:14,231 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:14,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175465710] [2019-10-14 23:54:14,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:14,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175465710] [2019-10-14 23:54:14,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:14,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:14,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94376848] [2019-10-14 23:54:14,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:14,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:14,740 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:15,793 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:15,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:15,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-14 23:54:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:15,823 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:15,823 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:15,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:54:15,966 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 81 [2019-10-14 23:54:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:15,968 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:54:15,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:54:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 23:54:15,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:15,986 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:15,986 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1103688704, now seen corresponding path program 1 times [2019-10-14 23:54:15,989 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:15,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627315584] [2019-10-14 23:54:15,989 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:15,989 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:15,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:16,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627315584] [2019-10-14 23:54:16,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:16,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:16,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025555404] [2019-10-14 23:54:16,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:16,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:16,172 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:54:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:17,136 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:54:17,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:17,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-10-14 23:54:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:17,152 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:54:17,152 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:54:17,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:54:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:54:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:54:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-10-14 23:54:17,229 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 91 [2019-10-14 23:54:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:17,231 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-10-14 23:54:17,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-10-14 23:54:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 23:54:17,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:17,237 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:54:17,237 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:17,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1757730961, now seen corresponding path program 1 times [2019-10-14 23:54:17,242 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:17,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794803686] [2019-10-14 23:54:17,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:17,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794803686] [2019-10-14 23:54:17,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624328731] [2019-10-14 23:54:17,431 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 [2019-10-14 23:54:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:17,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:17,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:17,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:17,739 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:54:17,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:54:17,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009218337] [2019-10-14 23:54:17,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:17,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:17,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:17,744 INFO L87 Difference]: Start difference. First operand 556 states and 784 transitions. Second operand 3 states. [2019-10-14 23:54:18,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:18,425 INFO L93 Difference]: Finished difference Result 1650 states and 2377 transitions. [2019-10-14 23:54:18,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:18,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-14 23:54:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:18,433 INFO L225 Difference]: With dead ends: 1650 [2019-10-14 23:54:18,434 INFO L226 Difference]: Without dead ends: 1100 [2019-10-14 23:54:18,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-10-14 23:54:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-10-14 23:54:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-10-14 23:54:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1508 transitions. [2019-10-14 23:54:18,479 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1508 transitions. Word has length 115 [2019-10-14 23:54:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:18,480 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1508 transitions. [2019-10-14 23:54:18,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1508 transitions. [2019-10-14 23:54:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 23:54:18,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:18,486 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 23:54:18,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:18,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash -80606461, now seen corresponding path program 1 times [2019-10-14 23:54:18,691 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:18,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570216501] [2019-10-14 23:54:18,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:18,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:18,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:18,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570216501] [2019-10-14 23:54:18,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887040624] [2019-10-14 23:54:18,959 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 [2019-10-14 23:54:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:19,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:19,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:19,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:19,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [279600431] [2019-10-14 23:54:19,266 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-10-14 23:54:19,324 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:19,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)