java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:38,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:38,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:38,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:38,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:38,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:38,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:38,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:38,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:38,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:38,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:38,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:38,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:38,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:38,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:38,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:38,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:38,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:38,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:38,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:38,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:38,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:38,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:38,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:38,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:38,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:38,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:38,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:38,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:08:38,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:38,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:38,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:38,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:38,819 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:38,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:38,819 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:38,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:38,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:38,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:38,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:38,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:38,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:38,821 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:38,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:38,821 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:38,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:38,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:38,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:38,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:38,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:38,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:38,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:38,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:38,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:38,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:38,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:38,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:38,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:08:39,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:39,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:39,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:39,136 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:39,136 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:39,137 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-15 00:08:39,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cb3e1f2/498a117b6fd54c9cbfd8605b570dfa76/FLAGe9195fe15 [2019-10-15 00:08:39,879 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:39,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-15 00:08:39,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cb3e1f2/498a117b6fd54c9cbfd8605b570dfa76/FLAGe9195fe15 [2019-10-15 00:08:40,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cb3e1f2/498a117b6fd54c9cbfd8605b570dfa76 [2019-10-15 00:08:40,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:40,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:40,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:40,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:40,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:40,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:40" (1/1) ... [2019-10-15 00:08:40,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6836b2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:40, skipping insertion in model container [2019-10-15 00:08:40,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:40" (1/1) ... [2019-10-15 00:08:40,100 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:40,183 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:40,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:40,997 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:41,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:41,614 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:41,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41 WrapperNode [2019-10-15 00:08:41,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:41,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:41,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:41,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:41,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... [2019-10-15 00:08:41,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:41,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:41,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:41,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:41,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:41,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:41,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:41,861 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:41,861 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:41,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:41,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:41,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:41,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:44,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:44,196 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:44,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:44 BoogieIcfgContainer [2019-10-15 00:08:44,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:44,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:44,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:44,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:44,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:40" (1/3) ... [2019-10-15 00:08:44,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d23e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:44, skipping insertion in model container [2019-10-15 00:08:44,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:41" (2/3) ... [2019-10-15 00:08:44,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d23e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:44, skipping insertion in model container [2019-10-15 00:08:44,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:44" (3/3) ... [2019-10-15 00:08:44,220 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2019-10-15 00:08:44,233 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:44,246 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:44,259 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:44,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:44,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:44,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:44,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:44,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:44,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:44,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:44,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-15 00:08:44,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:44,357 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] [2019-10-15 00:08:44,359 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1586905158, now seen corresponding path program 1 times [2019-10-15 00:08:44,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:44,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097981614] [2019-10-15 00:08:44,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:44,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:44,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:44,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097981614] [2019-10-15 00:08:44,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:44,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:44,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888124808] [2019-10-15 00:08:44,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:44,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:44,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:44,668 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:47,227 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:47,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:47,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-15 00:08:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:47,253 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:47,253 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:47,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1172 transitions. [2019-10-15 00:08:47,373 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1172 transitions. Word has length 41 [2019-10-15 00:08:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:47,374 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1172 transitions. [2019-10-15 00:08:47,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1172 transitions. [2019-10-15 00:08:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 00:08:47,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:47,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:47,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash 904307166, now seen corresponding path program 1 times [2019-10-15 00:08:47,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:47,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860084781] [2019-10-15 00:08:47,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:47,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:47,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:47,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860084781] [2019-10-15 00:08:47,655 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:47,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:47,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101520253] [2019-10-15 00:08:47,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:47,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:47,660 INFO L87 Difference]: Start difference. First operand 682 states and 1172 transitions. Second operand 6 states. [2019-10-15 00:08:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:50,843 INFO L93 Difference]: Finished difference Result 2074 states and 3595 transitions. [2019-10-15 00:08:50,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:50,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-10-15 00:08:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:50,856 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 00:08:50,856 INFO L226 Difference]: Without dead ends: 1398 [2019-10-15 00:08:50,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2019-10-15 00:08:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1382. [2019-10-15 00:08:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2019-10-15 00:08:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 2347 transitions. [2019-10-15 00:08:50,924 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 2347 transitions. Word has length 113 [2019-10-15 00:08:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:50,925 INFO L462 AbstractCegarLoop]: Abstraction has 1382 states and 2347 transitions. [2019-10-15 00:08:50,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 2347 transitions. [2019-10-15 00:08:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 00:08:50,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:50,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:50,931 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash 569099783, now seen corresponding path program 1 times [2019-10-15 00:08:50,932 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:50,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421262661] [2019-10-15 00:08:50,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:50,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:50,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:51,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421262661] [2019-10-15 00:08:51,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:51,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:51,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927710207] [2019-10-15 00:08:51,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:51,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:51,210 INFO L87 Difference]: Start difference. First operand 1382 states and 2347 transitions. Second operand 6 states. [2019-10-15 00:08:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:54,172 INFO L93 Difference]: Finished difference Result 3496 states and 6017 transitions. [2019-10-15 00:08:54,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:54,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-15 00:08:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:54,191 INFO L225 Difference]: With dead ends: 3496 [2019-10-15 00:08:54,199 INFO L226 Difference]: Without dead ends: 2120 [2019-10-15 00:08:54,205 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 00:08:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2019-10-15 00:08:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2088. [2019-10-15 00:08:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2019-10-15 00:08:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3352 transitions. [2019-10-15 00:08:54,310 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3352 transitions. Word has length 142 [2019-10-15 00:08:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:54,312 INFO L462 AbstractCegarLoop]: Abstraction has 2088 states and 3352 transitions. [2019-10-15 00:08:54,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3352 transitions. [2019-10-15 00:08:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-10-15 00:08:54,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:54,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:54,332 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -256933473, now seen corresponding path program 1 times [2019-10-15 00:08:54,333 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:54,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641963531] [2019-10-15 00:08:54,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:54,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641963531] [2019-10-15 00:08:54,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:54,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:54,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79056426] [2019-10-15 00:08:54,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:54,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:54,952 INFO L87 Difference]: Start difference. First operand 2088 states and 3352 transitions. Second operand 6 states. [2019-10-15 00:08:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:57,664 INFO L93 Difference]: Finished difference Result 5903 states and 9557 transitions. [2019-10-15 00:08:57,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:57,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 314 [2019-10-15 00:08:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:57,700 INFO L225 Difference]: With dead ends: 5903 [2019-10-15 00:08:57,700 INFO L226 Difference]: Without dead ends: 3821 [2019-10-15 00:08:57,710 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2019-10-15 00:08:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3470. [2019-10-15 00:08:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2019-10-15 00:08:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5255 transitions. [2019-10-15 00:08:57,878 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5255 transitions. Word has length 314 [2019-10-15 00:08:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:57,881 INFO L462 AbstractCegarLoop]: Abstraction has 3470 states and 5255 transitions. [2019-10-15 00:08:57,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5255 transitions. [2019-10-15 00:08:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2019-10-15 00:08:57,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:57,898 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:57,898 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1551608138, now seen corresponding path program 1 times [2019-10-15 00:08:57,899 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:57,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717903969] [2019-10-15 00:08:57,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 68 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:58,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717903969] [2019-10-15 00:08:58,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500698703] [2019-10-15 00:08:58,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:58,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:08:58,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 00:08:58,732 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 68 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:59,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:59,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:08:59,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986028691] [2019-10-15 00:08:59,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:59,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:08:59,036 INFO L87 Difference]: Start difference. First operand 3470 states and 5255 transitions. Second operand 5 states. [2019-10-15 00:09:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:01,933 INFO L93 Difference]: Finished difference Result 8334 states and 12691 transitions. [2019-10-15 00:09:01,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:01,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 429 [2019-10-15 00:09:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:01,969 INFO L225 Difference]: With dead ends: 8334 [2019-10-15 00:09:01,969 INFO L226 Difference]: Without dead ends: 4870 [2019-10-15 00:09:01,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 853 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2019-10-15 00:09:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4862. [2019-10-15 00:09:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4862 states. [2019-10-15 00:09:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 6833 transitions. [2019-10-15 00:09:02,135 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 6833 transitions. Word has length 429 [2019-10-15 00:09:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:02,136 INFO L462 AbstractCegarLoop]: Abstraction has 4862 states and 6833 transitions. [2019-10-15 00:09:02,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 6833 transitions. [2019-10-15 00:09:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2019-10-15 00:09:02,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:02,150 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:02,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:02,364 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1907380526, now seen corresponding path program 1 times [2019-10-15 00:09:02,366 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:02,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492228167] [2019-10-15 00:09:02,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 107 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:09:02,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492228167] [2019-10-15 00:09:02,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741236806] [2019-10-15 00:09:02,967 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 00:09:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:03,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:03,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 00:09:03,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 204 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 00:09:03,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1612642543] [2019-10-15 00:09:03,750 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 530 [2019-10-15 00:09:03,811 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:03,811 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)