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/Problem14_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:03,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:03,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:03,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:03,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:03,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:03,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:03,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:03,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:03,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:03,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:03,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:03,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:03,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:03,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:03,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:03,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:03,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:03,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:03,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:03,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:03,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:03,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:03,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:03,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:03,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:03,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:03,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:03,393 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 00:06:03,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:03,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:03,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:03,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:03,408 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:03,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:03,408 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:03,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:03,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:03,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:03,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:03,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:03,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:03,410 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:03,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:03,410 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:03,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:03,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:03,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:03,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:03,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:03,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:03,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:03,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:03,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:03,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:03,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:03,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:03,413 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 00:06:03,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:03,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:03,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:03,692 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:03,693 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:03,693 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label27.c [2019-10-15 00:06:03,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd24b134/2df9555178d34441804c559ce17faa50/FLAGe07b836f5 [2019-10-15 00:06:04,365 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:04,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label27.c [2019-10-15 00:06:04,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd24b134/2df9555178d34441804c559ce17faa50/FLAGe07b836f5 [2019-10-15 00:06:04,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd24b134/2df9555178d34441804c559ce17faa50 [2019-10-15 00:06:04,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:04,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:04,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:04,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:04,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:04,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:04" (1/1) ... [2019-10-15 00:06:04,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:04, skipping insertion in model container [2019-10-15 00:06:04,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:04" (1/1) ... [2019-10-15 00:06:04,644 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:04,712 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:05,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:05,286 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:05,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:05,504 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:05,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05 WrapperNode [2019-10-15 00:06:05,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:05,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:05,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:05,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:05,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (1/1) ... [2019-10-15 00:06:05,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:05,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:05,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:05,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:05,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (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 00:06:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:07,460 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:07,460 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:07,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:07 BoogieIcfgContainer [2019-10-15 00:06:07,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:07,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:07,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:07,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:07,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:04" (1/3) ... [2019-10-15 00:06:07,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:07, skipping insertion in model container [2019-10-15 00:06:07,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:05" (2/3) ... [2019-10-15 00:06:07,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:07, skipping insertion in model container [2019-10-15 00:06:07,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:07" (3/3) ... [2019-10-15 00:06:07,484 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label27.c [2019-10-15 00:06:07,495 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:07,504 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:07,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:07,556 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:07,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:07,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:07,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:07,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:07,559 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:07,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:07,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 00:06:07,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:07,596 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] [2019-10-15 00:06:07,598 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1433861154, now seen corresponding path program 1 times [2019-10-15 00:06:07,613 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:07,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-15 00:06:07,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:07,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:07,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:07,855 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 00:06:07,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-15 00:06:07,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:07,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:07,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421823117] [2019-10-15 00:06:07,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:07,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:07,884 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:06:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:09,126 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:06:09,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:06:09,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-10-15 00:06:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:09,145 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:06:09,146 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:06:09,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:06:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:06:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 584 transitions. [2019-10-15 00:06:09,230 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 584 transitions. Word has length 35 [2019-10-15 00:06:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:09,230 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 584 transitions. [2019-10-15 00:06:09,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:06:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 584 transitions. [2019-10-15 00:06:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-15 00:06:09,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:09,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:09,237 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:09,238 INFO L82 PathProgramCache]: Analyzing trace with hash 236047245, now seen corresponding path program 1 times [2019-10-15 00:06:09,238 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:09,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175154970] [2019-10-15 00:06:09,238 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:09,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:09,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:09,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175154970] [2019-10-15 00:06:09,547 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:09,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:09,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676661729] [2019-10-15 00:06:09,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:09,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:09,551 INFO L87 Difference]: Start difference. First operand 372 states and 584 transitions. Second operand 6 states. [2019-10-15 00:06:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:10,813 INFO L93 Difference]: Finished difference Result 1126 states and 1797 transitions. [2019-10-15 00:06:10,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:10,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-15 00:06:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:10,822 INFO L225 Difference]: With dead ends: 1126 [2019-10-15 00:06:10,822 INFO L226 Difference]: Without dead ends: 760 [2019-10-15 00:06:10,826 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 00:06:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-15 00:06:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 748. [2019-10-15 00:06:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2019-10-15 00:06:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1095 transitions. [2019-10-15 00:06:10,895 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1095 transitions. Word has length 114 [2019-10-15 00:06:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:10,895 INFO L462 AbstractCegarLoop]: Abstraction has 748 states and 1095 transitions. [2019-10-15 00:06:10,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1095 transitions. [2019-10-15 00:06:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 00:06:10,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:10,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:10,900 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash -763732814, now seen corresponding path program 1 times [2019-10-15 00:06:10,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:10,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113677436] [2019-10-15 00:06:10,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:10,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:10,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:11,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113677436] [2019-10-15 00:06:11,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:11,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:11,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340158676] [2019-10-15 00:06:11,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:11,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:11,100 INFO L87 Difference]: Start difference. First operand 748 states and 1095 transitions. Second operand 4 states. [2019-10-15 00:06:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:12,476 INFO L93 Difference]: Finished difference Result 1858 states and 2692 transitions. [2019-10-15 00:06:12,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:12,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 00:06:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:12,485 INFO L225 Difference]: With dead ends: 1858 [2019-10-15 00:06:12,485 INFO L226 Difference]: Without dead ends: 1116 [2019-10-15 00:06:12,487 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 [2019-10-15 00:06:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-15 00:06:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-15 00:06:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-15 00:06:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1251 transitions. [2019-10-15 00:06:12,524 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1251 transitions. Word has length 147 [2019-10-15 00:06:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:12,525 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1251 transitions. [2019-10-15 00:06:12,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1251 transitions. [2019-10-15 00:06:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-15 00:06:12,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:12,532 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:06:12,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1543266050, now seen corresponding path program 1 times [2019-10-15 00:06:12,534 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:12,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504641703] [2019-10-15 00:06:12,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:12,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:12,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:12,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504641703] [2019-10-15 00:06:12,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177775075] [2019-10-15 00:06:12,822 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 00:06:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:12,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:06:12,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:13,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 00:06:13,215 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:13,411 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-15 00:06:13,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 56 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:13,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:06:13,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:06:13,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552098132] [2019-10-15 00:06:13,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:06:13,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:06:13,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:06:13,818 INFO L87 Difference]: Start difference. First operand 932 states and 1251 transitions. Second operand 5 states. [2019-10-15 00:06:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:15,322 INFO L93 Difference]: Finished difference Result 2254 states and 3044 transitions. [2019-10-15 00:06:15,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:06:15,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2019-10-15 00:06:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:15,332 INFO L225 Difference]: With dead ends: 2254 [2019-10-15 00:06:15,332 INFO L226 Difference]: Without dead ends: 1328 [2019-10-15 00:06:15,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 449 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:06:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2019-10-15 00:06:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1128. [2019-10-15 00:06:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-15 00:06:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1467 transitions. [2019-10-15 00:06:15,388 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1467 transitions. Word has length 227 [2019-10-15 00:06:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:15,390 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1467 transitions. [2019-10-15 00:06:15,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:06:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1467 transitions. [2019-10-15 00:06:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-10-15 00:06:15,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:15,399 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:15,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:06:15,604 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 320186650, now seen corresponding path program 1 times [2019-10-15 00:06:15,605 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:15,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849340232] [2019-10-15 00:06:15,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:15,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:15,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 170 proven. 154 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:16,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849340232] [2019-10-15 00:06:16,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897665114] [2019-10-15 00:06:16,454 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 00:06:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:16,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:06:16,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:16,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 246 proven. 53 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 00:06:16,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:16,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 92 proven. 232 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:17,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [632902891] [2019-10-15 00:06:17,440 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 312 [2019-10-15 00:06:17,492 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:17,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:30,224 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:30,226 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:06:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:30,230 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:34,166 INFO L227 lantSequenceWeakener]: Weakened 308 states. On average, predicates are now at 77.54% of their original sizes. [2019-10-15 00:06:34,166 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:34,244 INFO L553 sIntCurrentIteration]: We unified 310 AI predicates to 310 [2019-10-15 00:06:34,245 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:34,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:34,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-15 00:06:34,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917005535] [2019-10-15 00:06:34,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:06:34,248 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:34,248 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:06:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:06:34,249 INFO L87 Difference]: Start difference. First operand 1128 states and 1467 transitions. Second operand 11 states.