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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:12,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:12,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:12,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:12,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:12,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:12,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:12,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:12,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:12,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:12,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:12,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:12,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:12,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:12,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:12,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:12,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:12,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:12,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:12,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:12,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:12,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:12,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:12,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:12,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:12,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:12,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:12,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:12,650 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 00:04:12,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:12,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:12,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:12,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:12,674 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:12,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:12,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:12,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:12,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:12,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:12,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:12,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:12,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:12,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:12,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:12,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:12,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:12,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:12,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:12,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:12,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:12,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:12,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:12,684 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 00:04:12,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:13,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:13,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:13,037 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:13,038 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:13,039 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-15 00:04:13,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ad819d/915cf5609dab4717ab129aee569b4b34/FLAGda187edd5 [2019-10-15 00:04:13,814 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:13,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-15 00:04:13,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ad819d/915cf5609dab4717ab129aee569b4b34/FLAGda187edd5 [2019-10-15 00:04:13,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ad819d/915cf5609dab4717ab129aee569b4b34 [2019-10-15 00:04:13,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:13,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:13,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:13,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:13,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:13,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:13" (1/1) ... [2019-10-15 00:04:13,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf9c1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:13, skipping insertion in model container [2019-10-15 00:04:13,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:13" (1/1) ... [2019-10-15 00:04:13,959 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:14,015 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:14,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:14,743 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:15,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:15,054 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:15,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15 WrapperNode [2019-10-15 00:04:15,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:15,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:15,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:15,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:15,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (1/1) ... [2019-10-15 00:04:15,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:15,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:15,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:15,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:15,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (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 00:04:15,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:17,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:17,196 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:17,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:17 BoogieIcfgContainer [2019-10-15 00:04:17,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:17,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:17,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:17,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:17,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:13" (1/3) ... [2019-10-15 00:04:17,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4100a1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:17, skipping insertion in model container [2019-10-15 00:04:17,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:15" (2/3) ... [2019-10-15 00:04:17,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4100a1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:17, skipping insertion in model container [2019-10-15 00:04:17,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:17" (3/3) ... [2019-10-15 00:04:17,207 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-10-15 00:04:17,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:17,226 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:17,237 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:17,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:17,272 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:17,272 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:17,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:17,273 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:17,273 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:17,273 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:17,273 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 00:04:17,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:17,311 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] [2019-10-15 00:04:17,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-10-15 00:04:17,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:17,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832867175] [2019-10-15 00:04:17,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:17,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:17,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:17,691 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 00:04:17,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832867175] [2019-10-15 00:04:17,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:17,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:17,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003879689] [2019-10-15 00:04:17,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:17,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:17,719 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:04:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:20,292 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-15 00:04:20,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:20,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-15 00:04:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:20,318 INFO L225 Difference]: With dead ends: 975 [2019-10-15 00:04:20,319 INFO L226 Difference]: Without dead ends: 616 [2019-10-15 00:04:20,328 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 00:04:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-15 00:04:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-15 00:04:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-15 00:04:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-15 00:04:20,442 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 51 [2019-10-15 00:04:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:20,442 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-15 00:04:20,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-15 00:04:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 00:04:20,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:20,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:20,450 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-10-15 00:04:20,451 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:20,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870515499] [2019-10-15 00:04:20,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:20,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:20,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:20,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870515499] [2019-10-15 00:04:20,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:20,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:20,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432910330] [2019-10-15 00:04:20,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:20,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:20,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:20,687 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-15 00:04:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:22,257 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-15 00:04:22,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:22,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-15 00:04:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:22,265 INFO L225 Difference]: With dead ends: 1241 [2019-10-15 00:04:22,266 INFO L226 Difference]: Without dead ends: 825 [2019-10-15 00:04:22,269 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 [2019-10-15 00:04:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-15 00:04:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-15 00:04:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-15 00:04:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-15 00:04:22,312 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 123 [2019-10-15 00:04:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:22,315 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-15 00:04:22,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-15 00:04:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 00:04:22,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:22,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:22,325 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-10-15 00:04:22,327 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:22,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643617398] [2019-10-15 00:04:22,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:22,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:22,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:22,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643617398] [2019-10-15 00:04:22,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:22,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:22,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022860847] [2019-10-15 00:04:22,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:22,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:22,488 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-10-15 00:04:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:24,367 INFO L93 Difference]: Finished difference Result 2406 states and 3479 transitions. [2019-10-15 00:04:24,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:24,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 00:04:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:24,381 INFO L225 Difference]: With dead ends: 2406 [2019-10-15 00:04:24,381 INFO L226 Difference]: Without dead ends: 1598 [2019-10-15 00:04:24,384 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 00:04:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2019-10-15 00:04:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1393. [2019-10-15 00:04:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2019-10-15 00:04:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1963 transitions. [2019-10-15 00:04:24,446 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1963 transitions. Word has length 124 [2019-10-15 00:04:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:24,448 INFO L462 AbstractCegarLoop]: Abstraction has 1393 states and 1963 transitions. [2019-10-15 00:04:24,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1963 transitions. [2019-10-15 00:04:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 00:04:24,453 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:24,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:24,453 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-10-15 00:04:24,454 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:24,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91946860] [2019-10-15 00:04:24,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:24,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91946860] [2019-10-15 00:04:24,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002965279] [2019-10-15 00:04:24,718 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 00:04:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:24,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:04:24,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:24,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:25,011 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:25,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:25,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:25,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:25,465 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:25,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 00:04:25,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389648640] [2019-10-15 00:04:25,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:04:25,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:25,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:04:25,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:04:25,467 INFO L87 Difference]: Start difference. First operand 1393 states and 1963 transitions. Second operand 7 states. [2019-10-15 00:04:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:27,978 INFO L93 Difference]: Finished difference Result 4584 states and 6866 transitions. [2019-10-15 00:04:27,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 00:04:27,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2019-10-15 00:04:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:28,011 INFO L225 Difference]: With dead ends: 4584 [2019-10-15 00:04:28,012 INFO L226 Difference]: Without dead ends: 3197 [2019-10-15 00:04:28,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-15 00:04:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2019-10-15 00:04:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2974. [2019-10-15 00:04:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2974 states. [2019-10-15 00:04:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4002 transitions. [2019-10-15 00:04:28,150 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4002 transitions. Word has length 145 [2019-10-15 00:04:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:28,151 INFO L462 AbstractCegarLoop]: Abstraction has 2974 states and 4002 transitions. [2019-10-15 00:04:28,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:04:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4002 transitions. [2019-10-15 00:04:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-15 00:04:28,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:28,161 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:04:28,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:28,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash 968484805, now seen corresponding path program 1 times [2019-10-15 00:04:28,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:28,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463059110] [2019-10-15 00:04:28,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:28,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:28,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-15 00:04:28,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463059110] [2019-10-15 00:04:28,667 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:28,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:28,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935124403] [2019-10-15 00:04:28,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:28,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:28,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:28,669 INFO L87 Difference]: Start difference. First operand 2974 states and 4002 transitions. Second operand 4 states. [2019-10-15 00:04:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:30,520 INFO L93 Difference]: Finished difference Result 7667 states and 10969 transitions. [2019-10-15 00:04:30,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:30,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 273 [2019-10-15 00:04:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:30,549 INFO L225 Difference]: With dead ends: 7667 [2019-10-15 00:04:30,549 INFO L226 Difference]: Without dead ends: 4699 [2019-10-15 00:04:30,561 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 00:04:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2019-10-15 00:04:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4498. [2019-10-15 00:04:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-10-15 00:04:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6117 transitions. [2019-10-15 00:04:30,706 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6117 transitions. Word has length 273 [2019-10-15 00:04:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:30,708 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6117 transitions. [2019-10-15 00:04:30,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6117 transitions. [2019-10-15 00:04:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-15 00:04:30,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:30,717 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:04:30,717 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2139329586, now seen corresponding path program 1 times [2019-10-15 00:04:30,718 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:30,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853000406] [2019-10-15 00:04:30,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:30,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:30,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 88 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:31,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853000406] [2019-10-15 00:04:31,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250175451] [2019-10-15 00:04:31,203 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 00:04:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:31,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 00:04:31,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:31,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:31,547 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:31,718 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-10-15 00:04:31,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:31,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:31,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 89 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:32,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1290428166] [2019-10-15 00:04:32,487 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 277 [2019-10-15 00:04:32,535 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:32,535 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)