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/Problem16_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:02,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:02,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:02,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:02,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:02,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:02,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:02,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:02,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:02,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:02,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:02,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:02,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:02,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:02,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:02,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:02,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:02,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:02,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:02,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:02,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:02,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:02,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:02,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:02,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:02,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:02,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:02,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:02,950 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 [2019-10-15 00:09:02,965 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:02,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:02,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:02,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:02,967 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:02,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:02,967 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:02,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:02,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:02,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:02,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:02,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:02,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:02,969 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:02,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:02,969 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:02,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:02,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:02,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:02,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:02,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:02,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:02,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:02,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:02,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:02,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:02,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:02,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:02,972 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 [2019-10-15 00:09:03,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:03,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:03,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:03,279 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:03,280 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:03,280 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-10-15 00:09:03,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b65ff075/0a98f8ca11e64f148b5d731015392a7f/FLAGb69874d8e [2019-10-15 00:09:04,063 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:04,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-10-15 00:09:04,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b65ff075/0a98f8ca11e64f148b5d731015392a7f/FLAGb69874d8e [2019-10-15 00:09:04,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b65ff075/0a98f8ca11e64f148b5d731015392a7f [2019-10-15 00:09:04,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:04,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:04,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:04,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:04,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:04,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:04" (1/1) ... [2019-10-15 00:09:04,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b5c0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04, skipping insertion in model container [2019-10-15 00:09:04,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:04" (1/1) ... [2019-10-15 00:09:04,263 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:04,338 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:05,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:05,298 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:05,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:05,563 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:05,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05 WrapperNode [2019-10-15 00:09:05,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:05,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:05,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:05,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:05,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (1/1) ... [2019-10-15 00:09:05,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:05,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:05,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:05,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:05,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (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 [2019-10-15 00:09:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:05,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:05,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:05,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:08,540 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:08,541 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:08,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:08 BoogieIcfgContainer [2019-10-15 00:09:08,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:08,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:08,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:08,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:08,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:04" (1/3) ... [2019-10-15 00:09:08,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273f35e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:08, skipping insertion in model container [2019-10-15 00:09:08,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:05" (2/3) ... [2019-10-15 00:09:08,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273f35e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:08, skipping insertion in model container [2019-10-15 00:09:08,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:08" (3/3) ... [2019-10-15 00:09:08,551 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label47.c [2019-10-15 00:09:08,562 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:08,571 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:08,582 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:08,613 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:08,614 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:08,614 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:08,614 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:08,614 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:08,614 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:08,615 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:08,615 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:09:08,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:08,663 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:08,665 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1116751826, now seen corresponding path program 1 times [2019-10-15 00:09:08,683 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:08,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325321413] [2019-10-15 00:09:08,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:09,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325321413] [2019-10-15 00:09:09,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:09,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:09,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105501503] [2019-10-15 00:09:09,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:09,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:09,110 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:11,482 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:11,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:11,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-15 00:09:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:11,511 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:11,512 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:11,523 INFO L600 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 [2019-10-15 00:09:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-15 00:09:11,630 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 71 [2019-10-15 00:09:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:11,632 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-15 00:09:11,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-15 00:09:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 00:09:11,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:11,640 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:11,640 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1052551837, now seen corresponding path program 1 times [2019-10-15 00:09:11,641 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:11,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224572318] [2019-10-15 00:09:11,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:11,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:11,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:11,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224572318] [2019-10-15 00:09:11,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:11,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:09:11,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019849987] [2019-10-15 00:09:11,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:11,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:11,918 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-15 00:09:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:14,678 INFO L93 Difference]: Finished difference Result 2061 states and 3602 transitions. [2019-10-15 00:09:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:14,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-10-15 00:09:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:14,689 INFO L225 Difference]: With dead ends: 2061 [2019-10-15 00:09:14,689 INFO L226 Difference]: Without dead ends: 1385 [2019-10-15 00:09:14,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:09:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-10-15 00:09:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1377. [2019-10-15 00:09:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2019-10-15 00:09:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2120 transitions. [2019-10-15 00:09:14,757 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2120 transitions. Word has length 142 [2019-10-15 00:09:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:14,759 INFO L462 AbstractCegarLoop]: Abstraction has 1377 states and 2120 transitions. [2019-10-15 00:09:14,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2120 transitions. [2019-10-15 00:09:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 00:09:14,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:14,776 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:14,776 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -564206834, now seen corresponding path program 1 times [2019-10-15 00:09:14,777 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:14,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408783609] [2019-10-15 00:09:14,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:14,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:14,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:09:15,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408783609] [2019-10-15 00:09:15,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919788943] [2019-10-15 00:09:15,077 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 [2019-10-15 00:09:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:15,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:15,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:15,300 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:15,377 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:09:15,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 00:09:15,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102511111] [2019-10-15 00:09:15,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:15,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:15,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:15,380 INFO L87 Difference]: Start difference. First operand 1377 states and 2120 transitions. Second operand 3 states. [2019-10-15 00:09:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:17,114 INFO L93 Difference]: Finished difference Result 2060 states and 3048 transitions. [2019-10-15 00:09:17,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:17,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-15 00:09:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:17,129 INFO L225 Difference]: With dead ends: 2060 [2019-10-15 00:09:17,130 INFO L226 Difference]: Without dead ends: 2058 [2019-10-15 00:09:17,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2019-10-15 00:09:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1716. [2019-10-15 00:09:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-10-15 00:09:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2585 transitions. [2019-10-15 00:09:17,200 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2585 transitions. Word has length 171 [2019-10-15 00:09:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:17,201 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 2585 transitions. [2019-10-15 00:09:17,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2585 transitions. [2019-10-15 00:09:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 00:09:17,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:17,205 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:17,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:17,420 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash -528114181, now seen corresponding path program 1 times [2019-10-15 00:09:17,421 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:17,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483410841] [2019-10-15 00:09:17,421 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:17,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:17,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:17,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483410841] [2019-10-15 00:09:17,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:17,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:17,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46945543] [2019-10-15 00:09:17,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:17,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:17,626 INFO L87 Difference]: Start difference. First operand 1716 states and 2585 transitions. Second operand 6 states. [2019-10-15 00:09:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:20,054 INFO L93 Difference]: Finished difference Result 4144 states and 6180 transitions. [2019-10-15 00:09:20,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:20,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2019-10-15 00:09:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:20,074 INFO L225 Difference]: With dead ends: 4144 [2019-10-15 00:09:20,074 INFO L226 Difference]: Without dead ends: 2434 [2019-10-15 00:09:20,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2019-10-15 00:09:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2409. [2019-10-15 00:09:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2019-10-15 00:09:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3217 transitions. [2019-10-15 00:09:20,162 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3217 transitions. Word has length 186 [2019-10-15 00:09:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:20,163 INFO L462 AbstractCegarLoop]: Abstraction has 2409 states and 3217 transitions. [2019-10-15 00:09:20,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3217 transitions. [2019-10-15 00:09:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-15 00:09:20,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:20,170 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:20,170 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1332941046, now seen corresponding path program 1 times [2019-10-15 00:09:20,171 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:20,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755625845] [2019-10-15 00:09:20,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:20,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:20,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:20,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755625845] [2019-10-15 00:09:20,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519831822] [2019-10-15 00:09:20,621 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 [2019-10-15 00:09:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:20,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:20,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:20,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:21,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [840574936] [2019-10-15 00:09:21,109 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 316 [2019-10-15 00:09:21,159 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:21,160 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:29,856 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:29,858 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:29,862 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:09:39,852 INFO L227 lantSequenceWeakener]: Weakened 296 states. On average, predicates are now at 78.18% of their original sizes. [2019-10-15 00:09:39,852 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:09:39,966 INFO L553 sIntCurrentIteration]: We unified 314 AI predicates to 314 [2019-10-15 00:09:39,967 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:09:39,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:09:39,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 00:09:39,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801426660] [2019-10-15 00:09:39,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 00:09:39,970 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:39,970 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:09:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 00:09:39,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:39,971 INFO L87 Difference]: Start difference. First operand 2409 states and 3217 transitions. Second operand 12 states.