/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:58:02,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:58:02,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:58:02,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:58:02,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:58:02,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:58:02,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:58:02,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:58:02,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:58:02,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:58:02,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:58:02,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:58:02,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:58:02,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:58:02,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:58:02,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:58:02,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:58:02,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:58:02,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:58:02,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:58:02,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:58:02,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:58:02,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:58:02,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:58:02,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:58:02,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:58:02,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:58:02,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:58:02,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:58:02,576 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:58:02,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:58:02,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:58:02,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:58:02,578 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:58:02,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:58:02,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:58:02,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:58:02,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:58:02,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:58:02,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:58:02,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:58:02,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:58:02,580 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:58:02,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:58:02,580 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:58:02,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:58:02,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:58:02,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:58:02,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:58:02,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:58:02,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:58:02,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:58:02,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:58:02,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:58:02,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:58:02,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:58:02,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:58:02,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:58:02,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:58:02,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:58:02,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:58:02,883 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:58:02,883 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:58:02,884 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label46.c [2019-11-06 22:58:02,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fc002c6/a12a0d56e40c46f2b260c8ea17b3cdd5/FLAG36478b23c [2019-11-06 22:58:03,728 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:58:03,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label46.c [2019-11-06 22:58:03,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fc002c6/a12a0d56e40c46f2b260c8ea17b3cdd5/FLAG36478b23c [2019-11-06 22:58:03,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fc002c6/a12a0d56e40c46f2b260c8ea17b3cdd5 [2019-11-06 22:58:03,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:58:03,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:58:03,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:03,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:58:03,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:58:03,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:03" (1/1) ... [2019-11-06 22:58:03,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bb3648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:03, skipping insertion in model container [2019-11-06 22:58:03,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:03" (1/1) ... [2019-11-06 22:58:03,899 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:58:04,021 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:58:05,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:05,286 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:58:05,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:05,814 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:58:05,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05 WrapperNode [2019-11-06 22:58:05,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:05,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:58:05,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:58:05,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:58:05,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:06,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:06,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:06,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:58:06,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:58:06,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:58:06,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:58:06,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:58:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:58:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:58:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:58:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:58:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:58:09,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:58:09,759 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:58:09,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:09 BoogieIcfgContainer [2019-11-06 22:58:09,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:58:09,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:58:09,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:58:09,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:58:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:03" (1/3) ... [2019-11-06 22:58:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cba9f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:09, skipping insertion in model container [2019-11-06 22:58:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05" (2/3) ... [2019-11-06 22:58:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cba9f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:09, skipping insertion in model container [2019-11-06 22:58:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:09" (3/3) ... [2019-11-06 22:58:09,768 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label46.c [2019-11-06 22:58:09,778 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:58:09,787 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:58:09,801 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:58:09,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:58:09,836 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:58:09,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:58:09,836 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:58:09,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:58:09,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:58:09,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:58:09,837 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:58:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:58:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:58:09,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:09,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:09,944 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1888007721, now seen corresponding path program 1 times [2019-11-06 22:58:09,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:09,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420935105] [2019-11-06 22:58:09,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:10,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420935105] [2019-11-06 22:58:10,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:10,295 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:58:10,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056388117] [2019-11-06 22:58:10,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:58:10,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:10,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:58:10,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:10,321 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:14,601 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:14,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:14,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-11-06 22:58:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:14,647 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:14,647 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:14,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:58:14,838 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 42 [2019-11-06 22:58:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:14,840 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:58:14,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:58:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:58:14,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:14,849 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:14,849 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1067945283, now seen corresponding path program 1 times [2019-11-06 22:58:14,850 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:14,850 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114645943] [2019-11-06 22:58:14,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:15,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114645943] [2019-11-06 22:58:15,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:15,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:15,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799449349] [2019-11-06 22:58:15,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:15,121 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:15,122 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:58:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:20,322 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:58:20,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:20,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-11-06 22:58:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:20,342 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:58:20,342 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:58:20,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:58:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:58:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:58:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:58:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5127 transitions. [2019-11-06 22:58:20,433 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5127 transitions. Word has length 115 [2019-11-06 22:58:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:20,434 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5127 transitions. [2019-11-06 22:58:20,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5127 transitions. [2019-11-06 22:58:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:58:20,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:20,437 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:58:20,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1328815240, now seen corresponding path program 1 times [2019-11-06 22:58:20,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:20,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622080417] [2019-11-06 22:58:20,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:20,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622080417] [2019-11-06 22:58:20,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:20,544 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:58:20,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12767417] [2019-11-06 22:58:20,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:20,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:58:20,545 INFO L87 Difference]: Start difference. First operand 2864 states and 5127 transitions. Second operand 5 states. [2019-11-06 22:58:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:26,428 INFO L93 Difference]: Finished difference Result 8048 states and 14478 transitions. [2019-11-06 22:58:26,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:58:26,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-11-06 22:58:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:26,465 INFO L225 Difference]: With dead ends: 8048 [2019-11-06 22:58:26,466 INFO L226 Difference]: Without dead ends: 5190 [2019-11-06 22:58:26,473 INFO L630 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 [2019-11-06 22:58:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2019-11-06 22:58:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5092. [2019-11-06 22:58:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2019-11-06 22:58:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 8027 transitions. [2019-11-06 22:58:26,723 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 8027 transitions. Word has length 118 [2019-11-06 22:58:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:26,726 INFO L462 AbstractCegarLoop]: Abstraction has 5092 states and 8027 transitions. [2019-11-06 22:58:26,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 8027 transitions. [2019-11-06 22:58:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:58:26,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:26,732 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:58:26,732 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1516460572, now seen corresponding path program 1 times [2019-11-06 22:58:26,735 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:26,735 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241870469] [2019-11-06 22:58:26,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:26,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241870469] [2019-11-06 22:58:26,853 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:26,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:58:26,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675208210] [2019-11-06 22:58:26,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:26,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:58:26,855 INFO L87 Difference]: Start difference. First operand 5092 states and 8027 transitions. Second operand 4 states. [2019-11-06 22:58:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:33,773 INFO L93 Difference]: Finished difference Result 20168 states and 33052 transitions. [2019-11-06 22:58:33,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:58:33,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-11-06 22:58:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:33,852 INFO L225 Difference]: With dead ends: 20168 [2019-11-06 22:58:33,852 INFO L226 Difference]: Without dead ends: 15082 [2019-11-06 22:58:33,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:58:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15082 states. [2019-11-06 22:58:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15082 to 15082. [2019-11-06 22:58:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15082 states. [2019-11-06 22:58:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15082 states to 15082 states and 22373 transitions. [2019-11-06 22:58:34,252 INFO L78 Accepts]: Start accepts. Automaton has 15082 states and 22373 transitions. Word has length 148 [2019-11-06 22:58:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:34,253 INFO L462 AbstractCegarLoop]: Abstraction has 15082 states and 22373 transitions. [2019-11-06 22:58:34,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:58:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states and 22373 transitions. [2019-11-06 22:58:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 22:58:34,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:34,261 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:34,262 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 427642708, now seen corresponding path program 1 times [2019-11-06 22:58:34,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:34,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623634255] [2019-11-06 22:58:34,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:34,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623634255] [2019-11-06 22:58:34,414 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351885388] [2019-11-06 22:58:34,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:58:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:34,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:58:34,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 22:58:34,674 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:34,806 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:58:34,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-11-06 22:58:34,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605658116] [2019-11-06 22:58:34,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:34,808 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:58:34,809 INFO L87 Difference]: Start difference. First operand 15082 states and 22373 transitions. Second operand 5 states. [2019-11-06 22:58:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:40,031 INFO L93 Difference]: Finished difference Result 30401 states and 45489 transitions. [2019-11-06 22:58:40,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:40,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-11-06 22:58:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:40,099 INFO L225 Difference]: With dead ends: 30401 [2019-11-06 22:58:40,099 INFO L226 Difference]: Without dead ends: 15325 [2019-11-06 22:58:40,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 369 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:58:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15325 states. [2019-11-06 22:58:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15325 to 14589. [2019-11-06 22:58:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14589 states. [2019-11-06 22:58:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 19272 transitions. [2019-11-06 22:58:40,495 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 19272 transitions. Word has length 187 [2019-11-06 22:58:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:40,496 INFO L462 AbstractCegarLoop]: Abstraction has 14589 states and 19272 transitions. [2019-11-06 22:58:40,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 19272 transitions. [2019-11-06 22:58:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-11-06 22:58:40,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:40,503 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:58:40,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:58:40,709 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2060649185, now seen corresponding path program 1 times [2019-11-06 22:58:40,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:40,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987715078] [2019-11-06 22:58:40,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 176 proven. 69 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 22:58:40,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987715078] [2019-11-06 22:58:40,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091889862] [2019-11-06 22:58:40,944 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)