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/Problem03_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:20,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:20,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:20,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:20,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:20,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:20,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:20,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:20,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:20,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:20,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:20,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:20,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:20,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:20,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:20,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:20,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:20,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:20,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:20,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:20,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:20,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:20,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:20,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:20,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:20,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:20,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:20,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:20,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:20,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:20,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:20,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:20,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:20,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:20,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:20,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:20,363 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 23:58:20,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:20,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:20,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:20,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:20,384 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:20,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:20,385 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:20,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:20,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:20,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:20,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:20,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:20,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:20,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:20,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:20,387 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:20,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:20,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:20,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:20,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:20,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:20,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:20,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:20,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:20,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:20,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:20,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:20,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:20,390 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 23:58:20,678 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:20,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:20,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:20,697 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:20,697 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:20,698 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-10-14 23:58:20,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c55b0b87/0eaa01f5c6074910b8b7fcb61c9350ee/FLAG949e8c1f8 [2019-10-14 23:58:21,424 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:21,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-10-14 23:58:21,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c55b0b87/0eaa01f5c6074910b8b7fcb61c9350ee/FLAG949e8c1f8 [2019-10-14 23:58:21,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c55b0b87/0eaa01f5c6074910b8b7fcb61c9350ee [2019-10-14 23:58:21,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:21,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:21,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:21,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:21,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:21,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5000c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21, skipping insertion in model container [2019-10-14 23:58:21,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,609 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:21,692 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:22,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:22,557 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:22,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:23,023 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:23,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23 WrapperNode [2019-10-14 23:58:23,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:23,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:23,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:23,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:23,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:23,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:23,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:23,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:23,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (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 23:58:23,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:23,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:23,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:23,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:23,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:25,320 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:25,321 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:25,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:25 BoogieIcfgContainer [2019-10-14 23:58:25,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:25,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:25,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:25,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:25,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:21" (1/3) ... [2019-10-14 23:58:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1096f925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:25, skipping insertion in model container [2019-10-14 23:58:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (2/3) ... [2019-10-14 23:58:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1096f925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:25, skipping insertion in model container [2019-10-14 23:58:25,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:25" (3/3) ... [2019-10-14 23:58:25,332 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2019-10-14 23:58:25,342 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:25,351 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:25,363 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:25,393 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:25,394 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:25,394 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:25,394 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:25,394 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:25,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:25,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:25,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:58:25,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:25,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:25,446 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1544332784, now seen corresponding path program 1 times [2019-10-14 23:58:25,465 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:25,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862974472] [2019-10-14 23:58:25,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:25,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:25,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:26,426 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 23:58:26,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862974472] [2019-10-14 23:58:26,428 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:26,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:26,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814951939] [2019-10-14 23:58:26,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:26,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:26,462 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:27,879 INFO L93 Difference]: Finished difference Result 845 states and 1488 transitions. [2019-10-14 23:58:27,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:27,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-14 23:58:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:27,906 INFO L225 Difference]: With dead ends: 845 [2019-10-14 23:58:27,906 INFO L226 Difference]: Without dead ends: 472 [2019-10-14 23:58:27,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-10-14 23:58:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2019-10-14 23:58:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2019-10-14 23:58:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 716 transitions. [2019-10-14 23:58:28,001 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 716 transitions. Word has length 171 [2019-10-14 23:58:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:28,006 INFO L462 AbstractCegarLoop]: Abstraction has 470 states and 716 transitions. [2019-10-14 23:58:28,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 716 transitions. [2019-10-14 23:58:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 23:58:28,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:28,021 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:28,021 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 606817572, now seen corresponding path program 1 times [2019-10-14 23:58:28,025 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:28,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727726352] [2019-10-14 23:58:28,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:28,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727726352] [2019-10-14 23:58:28,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:28,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:28,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874486298] [2019-10-14 23:58:28,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:28,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:28,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:28,387 INFO L87 Difference]: Start difference. First operand 470 states and 716 transitions. Second operand 3 states. [2019-10-14 23:58:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:29,511 INFO L93 Difference]: Finished difference Result 1368 states and 2117 transitions. [2019-10-14 23:58:29,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:29,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2019-10-14 23:58:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:29,522 INFO L225 Difference]: With dead ends: 1368 [2019-10-14 23:58:29,522 INFO L226 Difference]: Without dead ends: 904 [2019-10-14 23:58:29,531 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 [2019-10-14 23:58:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-14 23:58:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 888. [2019-10-14 23:58:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-10-14 23:58:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1330 transitions. [2019-10-14 23:58:29,583 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1330 transitions. Word has length 183 [2019-10-14 23:58:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:29,584 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1330 transitions. [2019-10-14 23:58:29,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1330 transitions. [2019-10-14 23:58:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 23:58:29,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:29,589 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:29,590 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1768475732, now seen corresponding path program 1 times [2019-10-14 23:58:29,591 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:29,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425741771] [2019-10-14 23:58:29,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:29,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:29,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:29,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425741771] [2019-10-14 23:58:29,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212144607] [2019-10-14 23:58:29,767 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 23:58:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:29,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:30,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:30,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:30,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1857651815] [2019-10-14 23:58:30,315 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 194 [2019-10-14 23:58:30,399 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:30,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)