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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:25,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:25,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:25,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:25,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:25,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:25,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:25,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:25,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:25,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:25,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:25,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:25,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:25,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:25,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:26,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:26,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:26,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:26,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:26,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:26,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:26,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:26,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:26,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:26,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:03:26,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:26,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:26,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:26,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:26,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:26,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:26,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:26,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:26,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:26,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:26,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:26,043 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 [2019-10-13 20:03:26,057 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:26,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:26,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:26,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:26,059 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:26,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:26,060 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:26,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:26,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:26,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:26,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:26,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:26,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:26,061 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:26,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:26,062 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:26,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:26,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:26,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:26,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:26,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:26,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:26,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:26,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:26,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:26,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:26,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:26,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:26,064 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 [2019-10-13 20:03:26,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:26,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:26,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:26,381 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:26,381 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:26,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-13 20:03:26,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184c4f9f/4d1606be0527452face6b1268d324a13/FLAGf574c5f3f [2019-10-13 20:03:27,041 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:27,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-13 20:03:27,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184c4f9f/4d1606be0527452face6b1268d324a13/FLAGf574c5f3f [2019-10-13 20:03:27,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a184c4f9f/4d1606be0527452face6b1268d324a13 [2019-10-13 20:03:27,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:27,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:27,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:27,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:27,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:27,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:27" (1/1) ... [2019-10-13 20:03:27,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:27, skipping insertion in model container [2019-10-13 20:03:27,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:27" (1/1) ... [2019-10-13 20:03:27,312 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:27,362 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:27,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:27,833 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:28,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:28,078 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:28,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28 WrapperNode [2019-10-13 20:03:28,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:28,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:28,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:28,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:28,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:28,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:28,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:28,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:28,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (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 [2019-10-13 20:03:28,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:28,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:28,248 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:28,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:29,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:29,449 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:29,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:29 BoogieIcfgContainer [2019-10-13 20:03:29,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:29,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:29,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:29,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:29,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:27" (1/3) ... [2019-10-13 20:03:29,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d408a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:29, skipping insertion in model container [2019-10-13 20:03:29,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (2/3) ... [2019-10-13 20:03:29,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d408a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:29, skipping insertion in model container [2019-10-13 20:03:29,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:29" (3/3) ... [2019-10-13 20:03:29,460 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label58.c [2019-10-13 20:03:29,471 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:29,481 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:29,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:29,526 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:29,526 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:29,526 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:29,526 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:29,527 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:29,527 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:29,527 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:29,527 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:03:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 20:03:29,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:29,559 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:29,560 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:29,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1079521594, now seen corresponding path program 1 times [2019-10-13 20:03:29,576 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:29,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202334897] [2019-10-13 20:03:29,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:29,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:29,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:29,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202334897] [2019-10-13 20:03:29,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:29,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:29,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567040978] [2019-10-13 20:03:29,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:29,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:29,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:29,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:29,828 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-13 20:03:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:31,341 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-13 20:03:31,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:31,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-13 20:03:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:31,364 INFO L225 Difference]: With dead ends: 733 [2019-10-13 20:03:31,364 INFO L226 Difference]: Without dead ends: 437 [2019-10-13 20:03:31,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-13 20:03:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-13 20:03:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-13 20:03:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-13 20:03:31,482 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 19 [2019-10-13 20:03:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:31,482 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-13 20:03:31,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-13 20:03:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 20:03:31,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:31,488 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:31,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1696713450, now seen corresponding path program 1 times [2019-10-13 20:03:31,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:31,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813296481] [2019-10-13 20:03:31,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:31,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:31,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:31,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813296481] [2019-10-13 20:03:31,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:31,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:31,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144610166] [2019-10-13 20:03:31,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:31,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:31,832 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-13 20:03:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:32,819 INFO L93 Difference]: Finished difference Result 1329 states and 2004 transitions. [2019-10-13 20:03:32,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:32,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-10-13 20:03:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:32,831 INFO L225 Difference]: With dead ends: 1329 [2019-10-13 20:03:32,831 INFO L226 Difference]: Without dead ends: 898 [2019-10-13 20:03:32,834 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 [2019-10-13 20:03:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-13 20:03:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-13 20:03:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-13 20:03:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-10-13 20:03:32,885 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 93 [2019-10-13 20:03:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:32,886 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-10-13 20:03:32,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-10-13 20:03:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 20:03:32,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:32,890 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:32,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1178531378, now seen corresponding path program 1 times [2019-10-13 20:03:32,891 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:32,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244674929] [2019-10-13 20:03:32,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:33,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244674929] [2019-10-13 20:03:33,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:33,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:33,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419314024] [2019-10-13 20:03:33,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:33,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:33,021 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-10-13 20:03:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:33,977 INFO L93 Difference]: Finished difference Result 2219 states and 3338 transitions. [2019-10-13 20:03:33,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:33,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-13 20:03:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:33,986 INFO L225 Difference]: With dead ends: 2219 [2019-10-13 20:03:33,986 INFO L226 Difference]: Without dead ends: 1345 [2019-10-13 20:03:33,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:03:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-10-13 20:03:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-10-13 20:03:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-13 20:03:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-10-13 20:03:34,034 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 95 [2019-10-13 20:03:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:34,034 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-10-13 20:03:34,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-10-13 20:03:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 20:03:34,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:34,038 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:34,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash -921580439, now seen corresponding path program 1 times [2019-10-13 20:03:34,039 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:34,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766333560] [2019-10-13 20:03:34,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:34,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766333560] [2019-10-13 20:03:34,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:34,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:34,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886096050] [2019-10-13 20:03:34,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:34,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:34,155 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 4 states. [2019-10-13 20:03:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:35,091 INFO L93 Difference]: Finished difference Result 2360 states and 3320 transitions. [2019-10-13 20:03:35,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:35,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-10-13 20:03:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:35,098 INFO L225 Difference]: With dead ends: 2360 [2019-10-13 20:03:35,098 INFO L226 Difference]: Without dead ends: 1327 [2019-10-13 20:03:35,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2019-10-13 20:03:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1327. [2019-10-13 20:03:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2019-10-13 20:03:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1706 transitions. [2019-10-13 20:03:35,137 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1706 transitions. Word has length 98 [2019-10-13 20:03:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:35,138 INFO L462 AbstractCegarLoop]: Abstraction has 1327 states and 1706 transitions. [2019-10-13 20:03:35,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1706 transitions. [2019-10-13 20:03:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 20:03:35,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:35,141 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:35,141 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1133582729, now seen corresponding path program 1 times [2019-10-13 20:03:35,141 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:35,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704665373] [2019-10-13 20:03:35,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:35,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704665373] [2019-10-13 20:03:35,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:35,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:35,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128352147] [2019-10-13 20:03:35,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:35,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:35,317 INFO L87 Difference]: Start difference. First operand 1327 states and 1706 transitions. Second operand 6 states. [2019-10-13 20:03:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:36,140 INFO L93 Difference]: Finished difference Result 3296 states and 4411 transitions. [2019-10-13 20:03:36,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:36,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-13 20:03:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:36,151 INFO L225 Difference]: With dead ends: 3296 [2019-10-13 20:03:36,151 INFO L226 Difference]: Without dead ends: 1975 [2019-10-13 20:03:36,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:03:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2019-10-13 20:03:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1784. [2019-10-13 20:03:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2019-10-13 20:03:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2199 transitions. [2019-10-13 20:03:36,252 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2199 transitions. Word has length 114 [2019-10-13 20:03:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:36,254 INFO L462 AbstractCegarLoop]: Abstraction has 1784 states and 2199 transitions. [2019-10-13 20:03:36,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2199 transitions. [2019-10-13 20:03:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 20:03:36,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:36,264 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:36,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash -306672650, now seen corresponding path program 1 times [2019-10-13 20:03:36,265 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:36,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128545078] [2019-10-13 20:03:36,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:36,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:36,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-13 20:03:36,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128545078] [2019-10-13 20:03:36,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651363815] [2019-10-13 20:03:36,458 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 [2019-10-13 20:03:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:36,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:36,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 20:03:36,684 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 20:03:36,745 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:36,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 20:03:36,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815355324] [2019-10-13 20:03:36,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:36,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:36,747 INFO L87 Difference]: Start difference. First operand 1784 states and 2199 transitions. Second operand 3 states. [2019-10-13 20:03:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:37,314 INFO L93 Difference]: Finished difference Result 2793 states and 3473 transitions. [2019-10-13 20:03:37,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:37,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2019-10-13 20:03:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:37,332 INFO L225 Difference]: With dead ends: 2793 [2019-10-13 20:03:37,332 INFO L226 Difference]: Without dead ends: 2791 [2019-10-13 20:03:37,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2019-10-13 20:03:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2217. [2019-10-13 20:03:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2019-10-13 20:03:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2756 transitions. [2019-10-13 20:03:37,396 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2756 transitions. Word has length 187 [2019-10-13 20:03:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:37,397 INFO L462 AbstractCegarLoop]: Abstraction has 2217 states and 2756 transitions. [2019-10-13 20:03:37,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2756 transitions. [2019-10-13 20:03:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-13 20:03:37,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:37,403 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:37,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:37,609 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1031995774, now seen corresponding path program 1 times [2019-10-13 20:03:37,610 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:37,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139752773] [2019-10-13 20:03:37,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:37,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:37,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 20:03:37,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139752773] [2019-10-13 20:03:37,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716287208] [2019-10-13 20:03:37,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:38,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:38,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:38,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:38,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1074799484] [2019-10-13 20:03:38,294 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 240 [2019-10-13 20:03:38,354 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:38,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:03:50,043 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.