java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:22,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:22,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:22,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:22,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:22,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:22,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:22,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:22,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:22,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:22,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:22,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:22,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:22,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:22,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:22,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:22,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:22,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:22,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:22,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:22,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:22,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:22,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:22,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:22,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:22,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:22,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:22,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:22,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:07:22,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:22,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:22,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:22,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:22,391 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:22,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:22,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:22,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:22,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:22,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:22,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:22,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:22,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:22,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:22,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:22,396 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:22,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:22,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:22,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:22,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:22,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:22,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:22,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:22,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:22,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:22,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:22,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:22,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:22,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:07:22,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:22,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:22,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:22,748 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:22,748 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:22,749 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-15 00:07:22,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c39e3d6d/9c07143abb16433f913bc5875a519fe9/FLAG63cef727a [2019-10-15 00:07:23,512 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:23,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-15 00:07:23,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c39e3d6d/9c07143abb16433f913bc5875a519fe9/FLAG63cef727a [2019-10-15 00:07:23,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c39e3d6d/9c07143abb16433f913bc5875a519fe9 [2019-10-15 00:07:23,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:23,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:23,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:23,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:23,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:23,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:23" (1/1) ... [2019-10-15 00:07:23,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf90c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:23, skipping insertion in model container [2019-10-15 00:07:23,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:23" (1/1) ... [2019-10-15 00:07:23,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:23,822 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:24,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:24,820 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:25,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:25,250 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:25,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25 WrapperNode [2019-10-15 00:07:25,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:25,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:25,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:25,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:25,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... [2019-10-15 00:07:25,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:25,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:25,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:25,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:25,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:25,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:25,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:25,554 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:25,554 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:25,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:28,916 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:28,917 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:28,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:28 BoogieIcfgContainer [2019-10-15 00:07:28,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:28,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:28,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:28,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:28,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:23" (1/3) ... [2019-10-15 00:07:28,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abe5d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:28, skipping insertion in model container [2019-10-15 00:07:28,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:25" (2/3) ... [2019-10-15 00:07:28,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abe5d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:28, skipping insertion in model container [2019-10-15 00:07:28,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:28" (3/3) ... [2019-10-15 00:07:28,945 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-10-15 00:07:28,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:28,974 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:28,990 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:29,034 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:29,036 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:29,036 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:29,036 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:29,036 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:29,036 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:29,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:29,037 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:07:29,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:29,092 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] [2019-10-15 00:07:29,094 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2120890949, now seen corresponding path program 1 times [2019-10-15 00:07:29,114 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:29,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698930686] [2019-10-15 00:07:29,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:29,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:29,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:29,585 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 00:07:29,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698930686] [2019-10-15 00:07:29,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:29,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:29,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644878345] [2019-10-15 00:07:29,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:29,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:29,614 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:33,896 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:33,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:33,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-10-15 00:07:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:33,959 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:33,960 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:33,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-15 00:07:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 00:07:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-15 00:07:34,111 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 71 [2019-10-15 00:07:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:34,112 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-15 00:07:34,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-15 00:07:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 00:07:34,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:34,119 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:34,120 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1052620642, now seen corresponding path program 1 times [2019-10-15 00:07:34,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:34,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244578676] [2019-10-15 00:07:34,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:34,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:34,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:34,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244578676] [2019-10-15 00:07:34,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:34,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:34,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116832603] [2019-10-15 00:07:34,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:34,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:34,358 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-15 00:07:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:38,441 INFO L93 Difference]: Finished difference Result 2627 states and 4583 transitions. [2019-10-15 00:07:38,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:38,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 00:07:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:38,454 INFO L225 Difference]: With dead ends: 2627 [2019-10-15 00:07:38,455 INFO L226 Difference]: Without dead ends: 1936 [2019-10-15 00:07:38,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2019-10-15 00:07:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1933. [2019-10-15 00:07:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2019-10-15 00:07:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2950 transitions. [2019-10-15 00:07:38,527 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2950 transitions. Word has length 140 [2019-10-15 00:07:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:38,528 INFO L462 AbstractCegarLoop]: Abstraction has 1933 states and 2950 transitions. [2019-10-15 00:07:38,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2950 transitions. [2019-10-15 00:07:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 00:07:38,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:38,537 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:07:38,538 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1486343896, now seen corresponding path program 1 times [2019-10-15 00:07:38,538 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:38,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429963512] [2019-10-15 00:07:38,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:38,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:38,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:38,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429963512] [2019-10-15 00:07:38,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:38,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:38,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830709409] [2019-10-15 00:07:38,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:38,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:38,848 INFO L87 Difference]: Start difference. First operand 1933 states and 2950 transitions. Second operand 5 states. [2019-10-15 00:07:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:43,654 INFO L93 Difference]: Finished difference Result 5794 states and 9031 transitions. [2019-10-15 00:07:43,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:43,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-15 00:07:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:43,678 INFO L225 Difference]: With dead ends: 5794 [2019-10-15 00:07:43,686 INFO L226 Difference]: Without dead ends: 3867 [2019-10-15 00:07:43,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2019-10-15 00:07:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3830. [2019-10-15 00:07:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3830 states. [2019-10-15 00:07:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5188 transitions. [2019-10-15 00:07:43,826 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5188 transitions. Word has length 187 [2019-10-15 00:07:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:43,827 INFO L462 AbstractCegarLoop]: Abstraction has 3830 states and 5188 transitions. [2019-10-15 00:07:43,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5188 transitions. [2019-10-15 00:07:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2019-10-15 00:07:43,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:43,843 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:43,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 91616955, now seen corresponding path program 1 times [2019-10-15 00:07:43,844 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:43,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142094465] [2019-10-15 00:07:43,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:43,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:43,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 331 proven. 98 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 00:07:45,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142094465] [2019-10-15 00:07:45,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431800515] [2019-10-15 00:07:45,029 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 00:07:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:45,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 00:07:45,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:45,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:07:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-15 00:07:45,725 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:45,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:45,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:45,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:45,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:45,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:46,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 192 proven. 170 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-15 00:07:46,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:46,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2019-10-15 00:07:46,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712214668] [2019-10-15 00:07:46,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:46,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:46,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:07:46,775 INFO L87 Difference]: Start difference. First operand 3830 states and 5188 transitions. Second operand 5 states. [2019-10-15 00:07:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:51,444 INFO L93 Difference]: Finished difference Result 8052 states and 10905 transitions. [2019-10-15 00:07:51,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:07:51,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2019-10-15 00:07:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:51,473 INFO L225 Difference]: With dead ends: 8052 [2019-10-15 00:07:51,473 INFO L226 Difference]: Without dead ends: 4228 [2019-10-15 00:07:51,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 898 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-15 00:07:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2019-10-15 00:07:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 3877. [2019-10-15 00:07:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3877 states. [2019-10-15 00:07:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5251 transitions. [2019-10-15 00:07:51,625 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5251 transitions. Word has length 449 [2019-10-15 00:07:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:51,626 INFO L462 AbstractCegarLoop]: Abstraction has 3877 states and 5251 transitions. [2019-10-15 00:07:51,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5251 transitions. [2019-10-15 00:07:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2019-10-15 00:07:51,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:51,644 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:51,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:51,850 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:51,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2070901156, now seen corresponding path program 1 times [2019-10-15 00:07:51,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:51,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701054971] [2019-10-15 00:07:51,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:51,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:51,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 310 proven. 63 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:07:52,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701054971] [2019-10-15 00:07:52,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606982711] [2019-10-15 00:07:52,512 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 00:07:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:52,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:07:52,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:52,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:07:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 383 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 00:07:52,921 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:53,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:53,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 274 proven. 80 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-15 00:07:53,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [666635840] [2019-10-15 00:07:53,309 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 524 [2019-10-15 00:07:53,374 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:53,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)