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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:20,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:20,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:21,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:21,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:21,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:21,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:21,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:21,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:21,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:21,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:21,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:21,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:21,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:21,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:21,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:21,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:21,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:21,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:21,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:21,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:21,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:21,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:21,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:21,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:03:21,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:21,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:21,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:21,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:21,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:21,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:21,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:21,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:21,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:21,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:21,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:21,076 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 20:03:21,107 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:21,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:21,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:21,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:21,114 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:21,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:21,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:21,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:21,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:21,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:21,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:21,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:21,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:21,116 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:21,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:21,116 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:21,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:21,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:21,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:21,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:21,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:21,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:21,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:21,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:21,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:21,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:21,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:21,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:21,119 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 20:03:21,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:21,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:21,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:21,462 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:21,462 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:21,463 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-13 20:03:21,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9b44b72c/034b819b9a914cf99a3754b5cc62f384/FLAG85adcae8c [2019-10-13 20:03:22,172 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:22,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-13 20:03:22,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9b44b72c/034b819b9a914cf99a3754b5cc62f384/FLAG85adcae8c [2019-10-13 20:03:22,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9b44b72c/034b819b9a914cf99a3754b5cc62f384 [2019-10-13 20:03:22,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:22,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:22,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:22,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:22,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:22,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:22" (1/1) ... [2019-10-13 20:03:22,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5a7a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:22, skipping insertion in model container [2019-10-13 20:03:22,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:22" (1/1) ... [2019-10-13 20:03:22,517 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:22,580 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:23,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:23,149 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:23,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:23,274 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:23,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23 WrapperNode [2019-10-13 20:03:23,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:23,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:23,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:23,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:23,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (1/1) ... [2019-10-13 20:03:23,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:23,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:23,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:23,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:23,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (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 20:03:23,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:23,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:23,457 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:23,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:24,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:24,717 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:24,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:24 BoogieIcfgContainer [2019-10-13 20:03:24,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:24,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:24,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:24,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:24,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:22" (1/3) ... [2019-10-13 20:03:24,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:24, skipping insertion in model container [2019-10-13 20:03:24,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:23" (2/3) ... [2019-10-13 20:03:24,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:24, skipping insertion in model container [2019-10-13 20:03:24,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:24" (3/3) ... [2019-10-13 20:03:24,730 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label56.c [2019-10-13 20:03:24,743 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:24,753 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:24,764 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:24,802 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:24,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:24,802 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:24,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:24,803 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:24,803 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:24,803 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:24,803 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:03:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 20:03:24,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:24,841 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] [2019-10-13 20:03:24,842 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1758937742, now seen corresponding path program 1 times [2019-10-13 20:03:24,857 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:24,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017244497] [2019-10-13 20:03:24,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:24,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:24,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:25,131 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 20:03:25,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017244497] [2019-10-13 20:03:25,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:25,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:25,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817727571] [2019-10-13 20:03:25,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:25,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:25,158 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:03:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:26,178 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:03:26,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:26,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-13 20:03:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:26,210 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:03:26,211 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:03:26,222 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 [2019-10-13 20:03:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:03:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:03:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:03:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-13 20:03:26,343 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 29 [2019-10-13 20:03:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:26,344 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-13 20:03:26,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-13 20:03:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 20:03:26,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:26,354 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:26,354 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash 30670753, now seen corresponding path program 1 times [2019-10-13 20:03:26,356 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:26,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233040993] [2019-10-13 20:03:26,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:26,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:26,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:03:26,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233040993] [2019-10-13 20:03:26,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830716767] [2019-10-13 20:03:26,689 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 20:03:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:26,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:26,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:26,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:26,893 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:26,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 20:03:26,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491601925] [2019-10-13 20:03:26,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:26,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:26,902 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 3 states. [2019-10-13 20:03:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:27,550 INFO L93 Difference]: Finished difference Result 582 states and 874 transitions. [2019-10-13 20:03:27,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:27,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-13 20:03:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:27,556 INFO L225 Difference]: With dead ends: 582 [2019-10-13 20:03:27,556 INFO L226 Difference]: Without dead ends: 580 [2019-10-13 20:03:27,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 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 20:03:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2019-10-13 20:03:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 437. [2019-10-13 20:03:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-13 20:03:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 658 transitions. [2019-10-13 20:03:27,579 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 658 transitions. Word has length 116 [2019-10-13 20:03:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:27,580 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 658 transitions. [2019-10-13 20:03:27,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 658 transitions. [2019-10-13 20:03:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 20:03:27,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:27,584 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:27,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:27,788 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 644320205, now seen corresponding path program 1 times [2019-10-13 20:03:27,789 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:27,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376397652] [2019-10-13 20:03:27,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:27,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:27,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:28,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376397652] [2019-10-13 20:03:28,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:28,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:03:28,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450449287] [2019-10-13 20:03:28,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:28,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:28,003 INFO L87 Difference]: Start difference. First operand 437 states and 658 transitions. Second operand 5 states. [2019-10-13 20:03:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:28,944 INFO L93 Difference]: Finished difference Result 1327 states and 2033 transitions. [2019-10-13 20:03:28,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:03:28,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 20:03:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:28,950 INFO L225 Difference]: With dead ends: 1327 [2019-10-13 20:03:28,951 INFO L226 Difference]: Without dead ends: 896 [2019-10-13 20:03:28,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:03:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-13 20:03:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 886. [2019-10-13 20:03:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-13 20:03:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1296 transitions. [2019-10-13 20:03:28,994 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1296 transitions. Word has length 154 [2019-10-13 20:03:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:28,995 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1296 transitions. [2019-10-13 20:03:28,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1296 transitions. [2019-10-13 20:03:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 20:03:29,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:29,003 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:03:29,003 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 171733525, now seen corresponding path program 1 times [2019-10-13 20:03:29,004 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:29,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966786540] [2019-10-13 20:03:29,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:29,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:29,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:29,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966786540] [2019-10-13 20:03:29,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412132787] [2019-10-13 20:03:29,215 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 20:03:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:29,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:29,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 20:03:29,455 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:29,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:29,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-13 20:03:29,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370557512] [2019-10-13 20:03:29,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:29,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:03:29,644 INFO L87 Difference]: Start difference. First operand 886 states and 1296 transitions. Second operand 5 states. [2019-10-13 20:03:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:30,612 INFO L93 Difference]: Finished difference Result 2096 states and 3158 transitions. [2019-10-13 20:03:30,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:30,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-13 20:03:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:30,635 INFO L225 Difference]: With dead ends: 2096 [2019-10-13 20:03:30,636 INFO L226 Difference]: Without dead ends: 1216 [2019-10-13 20:03:30,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 422 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:03:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-10-13 20:03:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1192. [2019-10-13 20:03:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 20:03:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1614 transitions. [2019-10-13 20:03:30,697 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1614 transitions. Word has length 214 [2019-10-13 20:03:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:30,698 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1614 transitions. [2019-10-13 20:03:30,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1614 transitions. [2019-10-13 20:03:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-13 20:03:30,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:30,703 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:03:30,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:30,910 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -499290238, now seen corresponding path program 1 times [2019-10-13 20:03:30,911 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:30,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483109324] [2019-10-13 20:03:30,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:30,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:30,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 20:03:31,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483109324] [2019-10-13 20:03:31,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:31,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:31,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360364511] [2019-10-13 20:03:31,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:31,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:31,120 INFO L87 Difference]: Start difference. First operand 1192 states and 1614 transitions. Second operand 4 states. [2019-10-13 20:03:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:32,430 INFO L93 Difference]: Finished difference Result 3534 states and 4977 transitions. [2019-10-13 20:03:32,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:32,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2019-10-13 20:03:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:32,455 INFO L225 Difference]: With dead ends: 3534 [2019-10-13 20:03:32,456 INFO L226 Difference]: Without dead ends: 2348 [2019-10-13 20:03:32,461 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 20:03:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-13 20:03:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2060. [2019-10-13 20:03:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-10-13 20:03:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2802 transitions. [2019-10-13 20:03:32,550 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2802 transitions. Word has length 215 [2019-10-13 20:03:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:32,551 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2802 transitions. [2019-10-13 20:03:32,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2802 transitions. [2019-10-13 20:03:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 20:03:32,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:32,563 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:32,564 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1918826263, now seen corresponding path program 1 times [2019-10-13 20:03:32,565 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:32,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128153904] [2019-10-13 20:03:32,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,566 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:32,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128153904] [2019-10-13 20:03:32,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416803444] [2019-10-13 20:03:32,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:32,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:32,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 20:03:32,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:33,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:33,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:03:33,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548127475] [2019-10-13 20:03:33,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:33,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:33,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:03:33,119 INFO L87 Difference]: Start difference. First operand 2060 states and 2802 transitions. Second operand 5 states. [2019-10-13 20:03:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:34,048 INFO L93 Difference]: Finished difference Result 5016 states and 7033 transitions. [2019-10-13 20:03:34,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:03:34,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 244 [2019-10-13 20:03:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:34,068 INFO L225 Difference]: With dead ends: 5016 [2019-10-13 20:03:34,068 INFO L226 Difference]: Without dead ends: 2962 [2019-10-13 20:03:34,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:03:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-10-13 20:03:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2662. [2019-10-13 20:03:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2019-10-13 20:03:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3604 transitions. [2019-10-13 20:03:34,204 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3604 transitions. Word has length 244 [2019-10-13 20:03:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:34,204 INFO L462 AbstractCegarLoop]: Abstraction has 2662 states and 3604 transitions. [2019-10-13 20:03:34,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3604 transitions. [2019-10-13 20:03:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-10-13 20:03:34,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:34,216 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:03:34,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:34,429 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -324525238, now seen corresponding path program 1 times [2019-10-13 20:03:34,430 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:34,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112118180] [2019-10-13 20:03:34,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 20:03:34,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112118180] [2019-10-13 20:03:34,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465380229] [2019-10-13 20:03:34,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:34,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:34,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:35,080 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:35,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [399012066] [2019-10-13 20:03:35,234 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 250 [2019-10-13 20:03:35,320 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:35,320 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:03:47,478 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.