java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:58,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:58,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:58,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:58,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:58,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:58,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:58,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:59,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:59,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:59,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:59,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:59,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:59,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:59,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:59,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:59,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:59,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:59,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:59,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:59,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:59,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:59,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:59,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:59,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:59,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:59,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:59,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:59,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:59,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:59,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:59,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:59,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:59,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:59,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:59,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:59,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:58:59,075 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:59,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:59,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:59,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:59,079 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:59,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:59,079 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:59,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:59,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:59,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:59,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:59,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:59,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:59,082 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:59,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:59,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:59,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:59,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:59,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:59,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:59,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:59,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:59,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:59,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:59,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:59,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:59,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:59,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:59,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:58:59,359 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:59,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:59,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:59,381 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:59,381 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:59,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-10-14 23:58:59,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3585200/dadb6ba59c7145c89d7d66677cd95638/FLAGf2383f619 [2019-10-14 23:59:00,131 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:59:00,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-10-14 23:59:00,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3585200/dadb6ba59c7145c89d7d66677cd95638/FLAGf2383f619 [2019-10-14 23:59:00,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3585200/dadb6ba59c7145c89d7d66677cd95638 [2019-10-14 23:59:00,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:59:00,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:59:00,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:59:00,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:59:00,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:59:00,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:00" (1/1) ... [2019-10-14 23:59:00,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7babf457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:00, skipping insertion in model container [2019-10-14 23:59:00,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:00" (1/1) ... [2019-10-14 23:59:00,325 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:59:00,408 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:59:01,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:59:01,341 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:59:01,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:59:01,665 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:59:01,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01 WrapperNode [2019-10-14 23:59:01,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:59:01,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:59:01,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:59:01,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:59:01,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:59:01,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:59:01,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:59:01,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:59:01,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:59:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:59:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:59:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:59:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:59:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:59:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:59:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:59:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:59:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:59:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:59:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:59:04,346 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:59:04,347 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:59:04,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:04 BoogieIcfgContainer [2019-10-14 23:59:04,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:59:04,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:59:04,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:59:04,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:59:04,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:59:00" (1/3) ... [2019-10-14 23:59:04,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245ef328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:04, skipping insertion in model container [2019-10-14 23:59:04,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01" (2/3) ... [2019-10-14 23:59:04,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245ef328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:04, skipping insertion in model container [2019-10-14 23:59:04,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:04" (3/3) ... [2019-10-14 23:59:04,358 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2019-10-14 23:59:04,370 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:59:04,381 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:59:04,396 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:59:04,429 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:59:04,429 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:59:04,429 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:59:04,429 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:59:04,429 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:59:04,430 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:59:04,430 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:59:04,430 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:59:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:59:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:59:04,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:04,474 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:04,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1933795261, now seen corresponding path program 1 times [2019-10-14 23:59:04,493 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:04,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460843405] [2019-10-14 23:59:04,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:05,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460843405] [2019-10-14 23:59:05,361 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:05,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:59:05,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335197168] [2019-10-14 23:59:05,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:59:05,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:59:05,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:59:05,387 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-10-14 23:59:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:07,702 INFO L93 Difference]: Finished difference Result 1062 states and 1920 transitions. [2019-10-14 23:59:07,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:59:07,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-14 23:59:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:07,731 INFO L225 Difference]: With dead ends: 1062 [2019-10-14 23:59:07,732 INFO L226 Difference]: Without dead ends: 685 [2019-10-14 23:59:07,741 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:59:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-14 23:59:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 465. [2019-10-14 23:59:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-14 23:59:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 750 transitions. [2019-10-14 23:59:07,837 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 750 transitions. Word has length 156 [2019-10-14 23:59:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:07,838 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 750 transitions. [2019-10-14 23:59:07,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:59:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 750 transitions. [2019-10-14 23:59:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:59:07,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:07,845 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:59:07,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:07,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2055560806, now seen corresponding path program 1 times [2019-10-14 23:59:07,846 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:07,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378186634] [2019-10-14 23:59:07,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:07,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:07,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:08,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378186634] [2019-10-14 23:59:08,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:08,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:59:08,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71791332] [2019-10-14 23:59:08,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:59:08,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:59:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:59:08,075 INFO L87 Difference]: Start difference. First operand 465 states and 750 transitions. Second operand 6 states. [2019-10-14 23:59:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:09,824 INFO L93 Difference]: Finished difference Result 1400 states and 2333 transitions. [2019-10-14 23:59:09,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:59:09,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-10-14 23:59:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:09,834 INFO L225 Difference]: With dead ends: 1400 [2019-10-14 23:59:09,834 INFO L226 Difference]: Without dead ends: 941 [2019-10-14 23:59:09,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:59:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-10-14 23:59:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-10-14 23:59:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-10-14 23:59:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1442 transitions. [2019-10-14 23:59:09,892 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1442 transitions. Word has length 165 [2019-10-14 23:59:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:09,893 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 1442 transitions. [2019-10-14 23:59:09,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:59:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1442 transitions. [2019-10-14 23:59:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:59:09,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:09,898 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:59:09,898 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1409737428, now seen corresponding path program 1 times [2019-10-14 23:59:09,899 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:09,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025451158] [2019-10-14 23:59:09,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:09,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:09,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025451158] [2019-10-14 23:59:10,002 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:10,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:59:10,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781146084] [2019-10-14 23:59:10,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:59:10,004 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:59:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:59:10,005 INFO L87 Difference]: Start difference. First operand 900 states and 1442 transitions. Second operand 5 states. [2019-10-14 23:59:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:11,465 INFO L93 Difference]: Finished difference Result 2692 states and 4483 transitions. [2019-10-14 23:59:11,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:11,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-14 23:59:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:11,482 INFO L225 Difference]: With dead ends: 2692 [2019-10-14 23:59:11,482 INFO L226 Difference]: Without dead ends: 1798 [2019-10-14 23:59:11,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2019-10-14 23:59:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1763. [2019-10-14 23:59:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-10-14 23:59:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2724 transitions. [2019-10-14 23:59:11,561 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2724 transitions. Word has length 166 [2019-10-14 23:59:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:11,562 INFO L462 AbstractCegarLoop]: Abstraction has 1763 states and 2724 transitions. [2019-10-14 23:59:11,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:59:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2724 transitions. [2019-10-14 23:59:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:59:11,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:11,570 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:11,571 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash 986588969, now seen corresponding path program 1 times [2019-10-14 23:59:11,572 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:11,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098895561] [2019-10-14 23:59:11,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:11,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:11,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:11,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098895561] [2019-10-14 23:59:11,779 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:11,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:59:11,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147169809] [2019-10-14 23:59:11,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:11,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:11,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:11,827 INFO L87 Difference]: Start difference. First operand 1763 states and 2724 transitions. Second operand 3 states. [2019-10-14 23:59:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:13,025 INFO L93 Difference]: Finished difference Result 5008 states and 7961 transitions. [2019-10-14 23:59:13,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:13,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2019-10-14 23:59:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:13,046 INFO L225 Difference]: With dead ends: 5008 [2019-10-14 23:59:13,047 INFO L226 Difference]: Without dead ends: 3251 [2019-10-14 23:59:13,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2019-10-14 23:59:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3244. [2019-10-14 23:59:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3244 states. [2019-10-14 23:59:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4933 transitions. [2019-10-14 23:59:13,155 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4933 transitions. Word has length 168 [2019-10-14 23:59:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:13,156 INFO L462 AbstractCegarLoop]: Abstraction has 3244 states and 4933 transitions. [2019-10-14 23:59:13,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4933 transitions. [2019-10-14 23:59:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 23:59:13,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:13,167 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:59:13,167 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash 642664422, now seen corresponding path program 1 times [2019-10-14 23:59:13,168 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:13,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703527428] [2019-10-14 23:59:13,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:13,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:13,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:13,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703527428] [2019-10-14 23:59:13,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:13,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:59:13,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846040309] [2019-10-14 23:59:13,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:59:13,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:59:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:59:13,266 INFO L87 Difference]: Start difference. First operand 3244 states and 4933 transitions. Second operand 6 states. [2019-10-14 23:59:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:14,792 INFO L93 Difference]: Finished difference Result 9615 states and 16043 transitions. [2019-10-14 23:59:14,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:14,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-10-14 23:59:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:14,846 INFO L225 Difference]: With dead ends: 9615 [2019-10-14 23:59:14,847 INFO L226 Difference]: Without dead ends: 6377 [2019-10-14 23:59:14,862 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 [2019-10-14 23:59:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2019-10-14 23:59:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6298. [2019-10-14 23:59:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6298 states. [2019-10-14 23:59:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 9475 transitions. [2019-10-14 23:59:15,104 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 9475 transitions. Word has length 175 [2019-10-14 23:59:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:15,104 INFO L462 AbstractCegarLoop]: Abstraction has 6298 states and 9475 transitions. [2019-10-14 23:59:15,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:59:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 9475 transitions. [2019-10-14 23:59:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 23:59:15,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:15,127 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:59:15,127 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -452438846, now seen corresponding path program 1 times [2019-10-14 23:59:15,128 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:15,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792559836] [2019-10-14 23:59:15,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:15,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:15,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:15,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792559836] [2019-10-14 23:59:15,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176368759] [2019-10-14 23:59:15,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:15,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:59:15,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:59:15,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:59:15,838 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:15,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-14 23:59:15,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327248781] [2019-10-14 23:59:15,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:59:15,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:59:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:15,842 INFO L87 Difference]: Start difference. First operand 6298 states and 9475 transitions. Second operand 4 states. [2019-10-14 23:59:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:16,721 INFO L93 Difference]: Finished difference Result 12587 states and 18942 transitions. [2019-10-14 23:59:16,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:16,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-14 23:59:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:16,759 INFO L225 Difference]: With dead ends: 12587 [2019-10-14 23:59:16,759 INFO L226 Difference]: Without dead ends: 6295 [2019-10-14 23:59:16,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2019-10-14 23:59:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6295. [2019-10-14 23:59:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6295 states. [2019-10-14 23:59:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 9466 transitions. [2019-10-14 23:59:16,980 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 9466 transitions. Word has length 178 [2019-10-14 23:59:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:16,980 INFO L462 AbstractCegarLoop]: Abstraction has 6295 states and 9466 transitions. [2019-10-14 23:59:16,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:59:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 9466 transitions. [2019-10-14 23:59:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-14 23:59:17,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:17,007 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:59:17,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:17,215 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash -807458941, now seen corresponding path program 1 times [2019-10-14 23:59:17,216 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:17,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055539069] [2019-10-14 23:59:17,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:17,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:17,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:59:17,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055539069] [2019-10-14 23:59:17,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247315708] [2019-10-14 23:59:17,503 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 [2019-10-14 23:59:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:17,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:17,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 23:59:17,921 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:59:18,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [255033933] [2019-10-14 23:59:18,039 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 198 [2019-10-14 23:59:18,110 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:59:18,110 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)