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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:14,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:14,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:14,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:14,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:14,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:14,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:14,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:14,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:14,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:14,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:14,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:14,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:14,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:14,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:14,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:14,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:14,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:14,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:14,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:14,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:14,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:14,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:14,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:14,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:14,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:14,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:14,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:14,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:14,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:14,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:14,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:14,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:14,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:14,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:14,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:14,507 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 20:05:14,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:14,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:14,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:14,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:14,528 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:14,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:14,528 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:14,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:14,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:14,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:14,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:14,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:14,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:14,530 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:14,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:14,531 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:14,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:14,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:14,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:14,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:14,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:14,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:14,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:14,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:14,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:14,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:14,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:14,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:14,534 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 20:05:14,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:14,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:14,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:14,838 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:14,839 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:14,839 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-13 20:05:14,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e44192ca/4b334a540235463aa5e8893d9c47a0b2/FLAG16e176170 [2019-10-13 20:05:15,618 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:15,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-13 20:05:15,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e44192ca/4b334a540235463aa5e8893d9c47a0b2/FLAG16e176170 [2019-10-13 20:05:15,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e44192ca/4b334a540235463aa5e8893d9c47a0b2 [2019-10-13 20:05:15,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:15,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:15,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:15,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:15,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:15,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f565c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15, skipping insertion in model container [2019-10-13 20:05:15,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:15,933 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:16,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:16,600 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:16,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:16,921 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:16,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16 WrapperNode [2019-10-13 20:05:16,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:16,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:16,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:16,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:16,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:16,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:16,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:16,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:17,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:17,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:17,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (1/1) ... [2019-10-13 20:05:17,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:17,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:17,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:17,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:17,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (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 20:05:17,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:19,101 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:19,101 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:19,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:19 BoogieIcfgContainer [2019-10-13 20:05:19,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:19,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:19,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:19,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:19,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:15" (1/3) ... [2019-10-13 20:05:19,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbf4a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:19, skipping insertion in model container [2019-10-13 20:05:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:16" (2/3) ... [2019-10-13 20:05:19,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbf4a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:19, skipping insertion in model container [2019-10-13 20:05:19,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:19" (3/3) ... [2019-10-13 20:05:19,113 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-10-13 20:05:19,123 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:19,132 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:19,178 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:19,231 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:19,231 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:19,231 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:19,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:19,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:19,232 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:19,232 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:19,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 20:05:19,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:19,292 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] [2019-10-13 20:05:19,295 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-10-13 20:05:19,312 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:19,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963368430] [2019-10-13 20:05:19,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:19,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:19,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:19,618 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 20:05:19,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963368430] [2019-10-13 20:05:19,620 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:19,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:19,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041629546] [2019-10-13 20:05:19,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:19,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:19,646 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:05:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:22,228 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-13 20:05:22,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:22,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-13 20:05:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:22,255 INFO L225 Difference]: With dead ends: 975 [2019-10-13 20:05:22,256 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 20:05:22,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 20:05:22,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-13 20:05:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-13 20:05:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-13 20:05:22,349 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 51 [2019-10-13 20:05:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:22,349 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-13 20:05:22,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-13 20:05:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:05:22,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:22,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:22,359 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-10-13 20:05:22,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:22,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750547561] [2019-10-13 20:05:22,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:22,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:22,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:22,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750547561] [2019-10-13 20:05:22,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:22,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:22,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820296871] [2019-10-13 20:05:22,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:22,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:22,619 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-13 20:05:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:24,226 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-13 20:05:24,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:24,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-13 20:05:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:24,234 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 20:05:24,235 INFO L226 Difference]: Without dead ends: 825 [2019-10-13 20:05:24,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:05:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-13 20:05:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-13 20:05:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-13 20:05:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-13 20:05:24,287 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 123 [2019-10-13 20:05:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:24,288 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-13 20:05:24,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-13 20:05:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 20:05:24,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:24,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:24,292 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-10-13 20:05:24,292 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:24,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048773258] [2019-10-13 20:05:24,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:24,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:24,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:24,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048773258] [2019-10-13 20:05:24,480 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:24,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:24,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262643074] [2019-10-13 20:05:24,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:24,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:24,485 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-10-13 20:05:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:26,357 INFO L93 Difference]: Finished difference Result 2406 states and 3479 transitions. [2019-10-13 20:05:26,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:26,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 20:05:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:26,369 INFO L225 Difference]: With dead ends: 2406 [2019-10-13 20:05:26,369 INFO L226 Difference]: Without dead ends: 1598 [2019-10-13 20:05:26,372 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 20:05:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2019-10-13 20:05:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1393. [2019-10-13 20:05:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2019-10-13 20:05:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1963 transitions. [2019-10-13 20:05:26,427 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1963 transitions. Word has length 124 [2019-10-13 20:05:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:26,428 INFO L462 AbstractCegarLoop]: Abstraction has 1393 states and 1963 transitions. [2019-10-13 20:05:26,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1963 transitions. [2019-10-13 20:05:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 20:05:26,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:26,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:26,433 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-10-13 20:05:26,434 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:26,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768547972] [2019-10-13 20:05:26,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:26,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:26,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:26,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768547972] [2019-10-13 20:05:26,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313622091] [2019-10-13 20:05:26,810 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 20:05:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:26,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:05:26,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:27,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:27,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:27,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:27,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:27,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:27,669 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:27,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 20:05:27,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555060657] [2019-10-13 20:05:27,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:05:27,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:05:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:05:27,674 INFO L87 Difference]: Start difference. First operand 1393 states and 1963 transitions. Second operand 7 states. [2019-10-13 20:05:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:30,211 INFO L93 Difference]: Finished difference Result 4584 states and 6866 transitions. [2019-10-13 20:05:30,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 20:05:30,211 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2019-10-13 20:05:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:30,234 INFO L225 Difference]: With dead ends: 4584 [2019-10-13 20:05:30,235 INFO L226 Difference]: Without dead ends: 3197 [2019-10-13 20:05:30,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 20:05:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2019-10-13 20:05:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2974. [2019-10-13 20:05:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2974 states. [2019-10-13 20:05:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4002 transitions. [2019-10-13 20:05:30,377 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4002 transitions. Word has length 145 [2019-10-13 20:05:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:30,378 INFO L462 AbstractCegarLoop]: Abstraction has 2974 states and 4002 transitions. [2019-10-13 20:05:30,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:05:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4002 transitions. [2019-10-13 20:05:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 20:05:30,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:30,386 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:30,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:30,591 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:30,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:30,591 INFO L82 PathProgramCache]: Analyzing trace with hash 968484805, now seen corresponding path program 1 times [2019-10-13 20:05:30,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:30,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443503638] [2019-10-13 20:05:30,592 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:30,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:30,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:05:30,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443503638] [2019-10-13 20:05:30,873 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:30,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:30,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658105209] [2019-10-13 20:05:30,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:30,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:30,875 INFO L87 Difference]: Start difference. First operand 2974 states and 4002 transitions. Second operand 4 states. [2019-10-13 20:05:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:32,659 INFO L93 Difference]: Finished difference Result 7667 states and 10969 transitions. [2019-10-13 20:05:32,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:32,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 273 [2019-10-13 20:05:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:32,690 INFO L225 Difference]: With dead ends: 7667 [2019-10-13 20:05:32,690 INFO L226 Difference]: Without dead ends: 4699 [2019-10-13 20:05:32,702 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 20:05:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2019-10-13 20:05:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4498. [2019-10-13 20:05:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-10-13 20:05:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6117 transitions. [2019-10-13 20:05:32,859 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6117 transitions. Word has length 273 [2019-10-13 20:05:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:32,860 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6117 transitions. [2019-10-13 20:05:32,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6117 transitions. [2019-10-13 20:05:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-13 20:05:32,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:32,870 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:32,870 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2139329586, now seen corresponding path program 1 times [2019-10-13 20:05:32,871 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:32,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676083541] [2019-10-13 20:05:32,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:32,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:32,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 88 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:33,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676083541] [2019-10-13 20:05:33,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095013594] [2019-10-13 20:05:33,270 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 20:05:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:33,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 20:05:33,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:33,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:33,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:33,793 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-10-13 20:05:33,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:33,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:33,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:33,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:33,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:33,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:33,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:34,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:34,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 89 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:34,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [376889665] [2019-10-13 20:05:34,555 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 277 [2019-10-13 20:05:34,620 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:34,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)