/usr/bin/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/Problem10_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:44:14,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:44:14,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:44:14,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:44:14,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:44:14,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:44:14,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:44:14,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:44:14,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:44:14,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:44:14,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:44:14,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:44:14,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:44:14,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:44:14,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:44:14,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:44:14,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:44:14,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:44:14,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:44:14,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:44:14,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:44:14,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:44:14,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:44:14,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:44:14,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:44:14,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:44:14,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:44:14,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:44:14,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:44:14,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:44:14,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:44:14,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:44:14,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:44:14,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:44:14,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:44:14,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:44:14,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:44:14,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:44:14,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:44:14,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:44:14,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:44:14,736 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 [2019-11-06 22:44:14,755 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:44:14,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:44:14,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:44:14,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:44:14,758 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:44:14,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:44:14,759 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:44:14,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:44:14,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:44:14,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:44:14,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:44:14,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:44:14,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:44:14,761 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:44:14,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:44:14,762 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:44:14,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:44:14,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:44:14,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:44:14,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:44:14,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:44:14,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:44:14,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:44:14,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:44:14,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:44:14,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:44:14,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:44:14,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:44:14,764 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 [2019-11-06 22:44:15,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:44:15,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:44:15,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:44:15,056 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:44:15,057 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:44:15,057 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label49.c [2019-11-06 22:44:15,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db943b55/2f1d87338a0f4d46b5946e7270f3e46b/FLAG0c3229f47 [2019-11-06 22:44:15,706 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:44:15,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label49.c [2019-11-06 22:44:15,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db943b55/2f1d87338a0f4d46b5946e7270f3e46b/FLAG0c3229f47 [2019-11-06 22:44:15,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db943b55/2f1d87338a0f4d46b5946e7270f3e46b [2019-11-06 22:44:15,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:44:15,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:44:15,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:15,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:44:15,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:44:15,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:15" (1/1) ... [2019-11-06 22:44:15,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:15, skipping insertion in model container [2019-11-06 22:44:15,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:15" (1/1) ... [2019-11-06 22:44:15,987 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:44:16,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:44:16,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:16,543 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:44:16,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:16,702 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:44:16,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16 WrapperNode [2019-11-06 22:44:16,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:16,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:44:16,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:44:16,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:44:16,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (1/1) ... [2019-11-06 22:44:16,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:44:16,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:44:16,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:44:16,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:44:16,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (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 [2019-11-06 22:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:44:16,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:44:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:44:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:44:18,149 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:44:18,149 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:44:18,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:18 BoogieIcfgContainer [2019-11-06 22:44:18,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:44:18,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:44:18,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:44:18,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:44:18,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:15" (1/3) ... [2019-11-06 22:44:18,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:18, skipping insertion in model container [2019-11-06 22:44:18,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:16" (2/3) ... [2019-11-06 22:44:18,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:18, skipping insertion in model container [2019-11-06 22:44:18,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:18" (3/3) ... [2019-11-06 22:44:18,160 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label49.c [2019-11-06 22:44:18,172 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:44:18,183 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:44:18,199 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:44:18,231 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:44:18,231 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:44:18,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:44:18,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:44:18,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:44:18,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:44:18,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:44:18,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:44:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:44:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:44:18,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:18,270 INFO L410 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] [2019-11-06 22:44:18,272 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1605828193, now seen corresponding path program 1 times [2019-11-06 22:44:18,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:18,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172897456] [2019-11-06 22:44:18,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:18,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172897456] [2019-11-06 22:44:18,585 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:18,585 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:44:18,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93898650] [2019-11-06 22:44:18,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:18,595 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:44:18,613 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:44:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:19,777 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:44:19,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:19,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-06 22:44:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:19,796 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:44:19,796 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:44:19,803 INFO L630 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 [2019-11-06 22:44:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:44:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:44:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:44:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:44:19,876 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 28 [2019-11-06 22:44:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:19,877 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:44:19,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:44:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 22:44:19,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:19,882 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:19,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash -351220503, now seen corresponding path program 1 times [2019-11-06 22:44:19,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:19,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402724276] [2019-11-06 22:44:19,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:20,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402724276] [2019-11-06 22:44:20,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:20,120 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:20,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718184656] [2019-11-06 22:44:20,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:20,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:20,123 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-11-06 22:44:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:21,048 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-11-06 22:44:21,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:21,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-06 22:44:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:21,054 INFO L225 Difference]: With dead ends: 741 [2019-11-06 22:44:21,054 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:44:21,055 INFO L630 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 [2019-11-06 22:44:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:44:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-11-06 22:44:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-11-06 22:44:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-11-06 22:44:21,087 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 101 [2019-11-06 22:44:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:21,088 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-11-06 22:44:21,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-11-06 22:44:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:44:21,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:21,092 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:21,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 788107453, now seen corresponding path program 1 times [2019-11-06 22:44:21,093 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:21,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730621510] [2019-11-06 22:44:21,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:21,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730621510] [2019-11-06 22:44:21,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:21,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:44:21,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352331259] [2019-11-06 22:44:21,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:44:21,185 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:21,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:44:21,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:21,185 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 4 states. [2019-11-06 22:44:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:22,324 INFO L93 Difference]: Finished difference Result 1611 states and 2315 transitions. [2019-11-06 22:44:22,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:44:22,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-11-06 22:44:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:22,336 INFO L225 Difference]: With dead ends: 1611 [2019-11-06 22:44:22,336 INFO L226 Difference]: Without dead ends: 1172 [2019-11-06 22:44:22,339 INFO L630 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 [2019-11-06 22:44:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2019-11-06 22:44:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2019-11-06 22:44:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-11-06 22:44:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1554 transitions. [2019-11-06 22:44:22,420 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1554 transitions. Word has length 107 [2019-11-06 22:44:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:22,421 INFO L462 AbstractCegarLoop]: Abstraction has 1172 states and 1554 transitions. [2019-11-06 22:44:22,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:44:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1554 transitions. [2019-11-06 22:44:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 22:44:22,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:22,430 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:22,430 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 58557854, now seen corresponding path program 1 times [2019-11-06 22:44:22,431 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:22,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766110734] [2019-11-06 22:44:22,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:22,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766110734] [2019-11-06 22:44:22,764 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:22,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:22,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744329024] [2019-11-06 22:44:22,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:22,766 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:22,766 INFO L87 Difference]: Start difference. First operand 1172 states and 1554 transitions. Second operand 6 states. [2019-11-06 22:44:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:23,768 INFO L93 Difference]: Finished difference Result 2372 states and 3192 transitions. [2019-11-06 22:44:23,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:23,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-11-06 22:44:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:23,788 INFO L225 Difference]: With dead ends: 2372 [2019-11-06 22:44:23,788 INFO L226 Difference]: Without dead ends: 1206 [2019-11-06 22:44:23,793 INFO L630 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 [2019-11-06 22:44:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2019-11-06 22:44:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1051. [2019-11-06 22:44:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-06 22:44:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1334 transitions. [2019-11-06 22:44:23,848 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1334 transitions. Word has length 164 [2019-11-06 22:44:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:23,850 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1334 transitions. [2019-11-06 22:44:23,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1334 transitions. [2019-11-06 22:44:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 22:44:23,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:23,856 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:23,856 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1560592178, now seen corresponding path program 1 times [2019-11-06 22:44:23,857 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:23,857 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792454462] [2019-11-06 22:44:23,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:24,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792454462] [2019-11-06 22:44:24,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:24,097 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:24,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226246911] [2019-11-06 22:44:24,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:24,098 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:24,099 INFO L87 Difference]: Start difference. First operand 1051 states and 1334 transitions. Second operand 6 states. [2019-11-06 22:44:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:25,144 INFO L93 Difference]: Finished difference Result 2400 states and 3096 transitions. [2019-11-06 22:44:25,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:25,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-11-06 22:44:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:25,154 INFO L225 Difference]: With dead ends: 2400 [2019-11-06 22:44:25,155 INFO L226 Difference]: Without dead ends: 1355 [2019-11-06 22:44:25,159 INFO L630 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 [2019-11-06 22:44:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-11-06 22:44:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1200. [2019-11-06 22:44:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-11-06 22:44:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1479 transitions. [2019-11-06 22:44:25,211 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1479 transitions. Word has length 170 [2019-11-06 22:44:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:25,212 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1479 transitions. [2019-11-06 22:44:25,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1479 transitions. [2019-11-06 22:44:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-06 22:44:25,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:25,218 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:25,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash -226216260, now seen corresponding path program 1 times [2019-11-06 22:44:25,219 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:25,219 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536308675] [2019-11-06 22:44:25,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 22:44:25,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536308675] [2019-11-06 22:44:25,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361429457] [2019-11-06 22:44:25,569 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 [2019-11-06 22:44:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:25,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:25,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:25,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:26,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1641264379] [2019-11-06 22:44:26,055 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 244 [2019-11-06 22:44:26,136 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:44:26,136 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:38,426 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.