java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_false-unreach-call_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cceb4a-m [2018-01-29 23:00:46,994 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-29 23:00:46,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-29 23:00:47,005 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-29 23:00:47,005 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-29 23:00:47,005 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-29 23:00:47,006 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-29 23:00:47,008 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-29 23:00:47,009 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-29 23:00:47,010 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-29 23:00:47,010 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-29 23:00:47,010 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-29 23:00:47,011 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-29 23:00:47,012 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-29 23:00:47,012 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-29 23:00:47,015 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-29 23:00:47,016 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-29 23:00:47,017 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-29 23:00:47,018 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-29 23:00:47,018 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-29 23:00:47,019 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-29 23:00:47,025 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-29 23:00:47,026 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-29 23:00:47,026 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-29 23:00:47,027 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-29 23:00:47,027 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-29 23:00:47,028 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-29 23:00:47,028 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-29 23:00:47,028 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-29 23:00:47,028 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-29 23:00:47,028 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-29 23:00:47,029 INFO L98 SettingsManager]: Beginning loading settings from /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf [2018-01-29 23:00:47,036 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-29 23:00:47,036 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-29 23:00:47,037 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-29 23:00:47,037 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-29 23:00:47,037 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-29 23:00:47,037 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-29 23:00:47,037 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-29 23:00:47,038 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-29 23:00:47,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-29 23:00:47,039 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 23:00:47,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-29 23:00:47,039 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-29 23:00:47,040 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-29 23:00:47,040 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-29 23:00:47,040 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-29 23:00:47,041 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-29 23:00:47,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-29 23:00:47,071 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-29 23:00:47,073 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-29 23:00:47,074 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-29 23:00:47,074 INFO L276 PluginConnector]: CDTParser initialized [2018-01-29 23:00:47,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_false-unreach-call_ground.i [2018-01-29 23:00:47,138 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-29 23:00:47,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-29 23:00:47,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-29 23:00:47,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-29 23:00:47,144 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-29 23:00:47,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575e8500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47, skipping insertion in model container [2018-01-29 23:00:47,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,155 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 23:00:47,165 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 23:00:47,241 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 23:00:47,252 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 23:00:47,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47 WrapperNode [2018-01-29 23:00:47,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-29 23:00:47,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-29 23:00:47,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-29 23:00:47,256 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-29 23:00:47,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... [2018-01-29 23:00:47,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-29 23:00:47,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-29 23:00:47,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-29 23:00:47,276 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-29 23:00:47,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (1/1) ... No working directory specified, using /home/daniel/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 [2018-01-29 23:00:47,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-29 23:00:47,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-29 23:00:47,317 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-29 23:00:47,317 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-29 23:00:47,317 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-29 23:00:47,317 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-29 23:00:47,317 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-29 23:00:47,317 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-29 23:00:47,317 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-29 23:00:47,613 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-29 23:00:47,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 11:00:47 BoogieIcfgContainer [2018-01-29 23:00:47,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-29 23:00:47,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-29 23:00:47,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-29 23:00:47,615 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-29 23:00:47,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 11:00:47" (1/3) ... [2018-01-29 23:00:47,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40807243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 11:00:47, skipping insertion in model container [2018-01-29 23:00:47,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 11:00:47" (2/3) ... [2018-01-29 23:00:47,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40807243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 11:00:47, skipping insertion in model container [2018-01-29 23:00:47,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 11:00:47" (3/3) ... [2018-01-29 23:00:47,617 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_init6_false-unreach-call_ground.i [2018-01-29 23:00:47,622 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-29 23:00:47,628 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-01-29 23:00:47,653 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-29 23:00:47,653 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-29 23:00:47,653 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-29 23:00:47,653 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-29 23:00:47,653 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-29 23:00:47,653 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-29 23:00:47,653 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-29 23:00:47,653 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-29 23:00:47,654 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-29 23:00:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-29 23:00:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-29 23:00:47,666 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:47,667 INFO L350 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] [2018-01-29 23:00:47,667 INFO L371 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash -545117900, now seen corresponding path program 1 times [2018-01-29 23:00:47,671 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:47,671 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:47,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:47,698 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:47,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:47,722 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 23:00:47,741 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 23:00:47,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-29 23:00:47,742 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-29 23:00:47,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-29 23:00:47,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-29 23:00:47,750 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-29 23:00:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:47,764 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2018-01-29 23:00:47,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-29 23:00:47,765 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-29 23:00:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:47,771 INFO L225 Difference]: With dead ends: 98 [2018-01-29 23:00:47,771 INFO L226 Difference]: Without dead ends: 49 [2018-01-29 23:00:47,773 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-29 23:00:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-29 23:00:47,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-29 23:00:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-29 23:00:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2018-01-29 23:00:47,794 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 25 [2018-01-29 23:00:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:47,794 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2018-01-29 23:00:47,794 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-29 23:00:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2018-01-29 23:00:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-29 23:00:47,795 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:47,795 INFO L350 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] [2018-01-29 23:00:47,795 INFO L371 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1847422288, now seen corresponding path program 1 times [2018-01-29 23:00:47,795 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:47,795 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:47,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:47,796 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:47,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:47,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 23:00:47,847 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 23:00:47,847 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-29 23:00:47,848 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-29 23:00:47,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-29 23:00:47,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-29 23:00:47,848 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 3 states. [2018-01-29 23:00:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:48,008 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2018-01-29 23:00:48,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-29 23:00:48,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-01-29 23:00:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:48,009 INFO L225 Difference]: With dead ends: 112 [2018-01-29 23:00:48,010 INFO L226 Difference]: Without dead ends: 73 [2018-01-29 23:00:48,010 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-29 23:00:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-29 23:00:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2018-01-29 23:00:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-29 23:00:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2018-01-29 23:00:48,014 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 31 [2018-01-29 23:00:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:48,015 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2018-01-29 23:00:48,015 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-29 23:00:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2018-01-29 23:00:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-29 23:00:48,016 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:48,016 INFO L350 BasicCegarLoop]: trace histogram [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] [2018-01-29 23:00:48,016 INFO L371 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash -332748400, now seen corresponding path program 1 times [2018-01-29 23:00:48,016 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:48,016 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:48,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,017 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:48,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:48,026 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-29 23:00:48,171 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:48,171 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:48,206 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:48,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-29 23:00:48,262 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:48,262 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-01-29 23:00:48,262 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 23:00:48,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 23:00:48,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 23:00:48,263 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 4 states. [2018-01-29 23:00:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:48,485 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2018-01-29 23:00:48,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 23:00:48,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-01-29 23:00:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:48,486 INFO L225 Difference]: With dead ends: 146 [2018-01-29 23:00:48,486 INFO L226 Difference]: Without dead ends: 97 [2018-01-29 23:00:48,487 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 23:00:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-29 23:00:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2018-01-29 23:00:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-29 23:00:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2018-01-29 23:00:48,492 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 55 [2018-01-29 23:00:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:48,493 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2018-01-29 23:00:48,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 23:00:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2018-01-29 23:00:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-29 23:00:48,494 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:48,494 INFO L350 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-01-29 23:00:48,494 INFO L371 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash 100595056, now seen corresponding path program 2 times [2018-01-29 23:00:48,494 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:48,494 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:48,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,495 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:48,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:48,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 23:00:48,566 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:48,566 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:48,574 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:00:48,581 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:48,592 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:48,600 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:48,602 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 23:00:48,626 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:48,626 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-29 23:00:48,627 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 23:00:48,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 23:00:48,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-29 23:00:48,627 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 5 states. [2018-01-29 23:00:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:48,929 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2018-01-29 23:00:48,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-29 23:00:48,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2018-01-29 23:00:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:48,930 INFO L225 Difference]: With dead ends: 190 [2018-01-29 23:00:48,930 INFO L226 Difference]: Without dead ends: 121 [2018-01-29 23:00:48,931 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-29 23:00:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-29 23:00:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2018-01-29 23:00:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-01-29 23:00:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2018-01-29 23:00:48,937 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 79 [2018-01-29 23:00:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:48,937 INFO L432 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2018-01-29 23:00:48,937 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 23:00:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2018-01-29 23:00:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-01-29 23:00:48,938 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:48,939 INFO L350 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:48,939 INFO L371 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1623656880, now seen corresponding path program 3 times [2018-01-29 23:00:48,939 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:48,939 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:48,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,940 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:48,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:48,957 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-01-29 23:00:49,041 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:49,041 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:49,047 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:00:49,053 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:49,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:49,059 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:49,062 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:49,065 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:49,067 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-01-29 23:00:49,090 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:49,090 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-01-29 23:00:49,091 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-29 23:00:49,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-29 23:00:49,091 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-29 23:00:49,091 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 6 states. [2018-01-29 23:00:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:49,390 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2018-01-29 23:00:49,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 23:00:49,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2018-01-29 23:00:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:49,392 INFO L225 Difference]: With dead ends: 234 [2018-01-29 23:00:49,392 INFO L226 Difference]: Without dead ends: 145 [2018-01-29 23:00:49,392 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-29 23:00:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-01-29 23:00:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2018-01-29 23:00:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-29 23:00:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2018-01-29 23:00:49,397 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 103 [2018-01-29 23:00:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:49,397 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2018-01-29 23:00:49,397 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-29 23:00:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2018-01-29 23:00:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-01-29 23:00:49,398 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:49,398 INFO L350 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:49,399 INFO L371 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:49,399 INFO L82 PathProgramCache]: Analyzing trace with hash -193844176, now seen corresponding path program 4 times [2018-01-29 23:00:49,399 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:49,399 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:49,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:49,400 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:49,400 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:49,423 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-01-29 23:00:49,549 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:49,549 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:49,554 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:00:49,586 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:49,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-01-29 23:00:49,613 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:49,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-01-29 23:00:49,613 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-29 23:00:49,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-29 23:00:49,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-29 23:00:49,614 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 7 states. [2018-01-29 23:00:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:49,835 INFO L93 Difference]: Finished difference Result 278 states and 297 transitions. [2018-01-29 23:00:49,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-29 23:00:49,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2018-01-29 23:00:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:49,836 INFO L225 Difference]: With dead ends: 278 [2018-01-29 23:00:49,837 INFO L226 Difference]: Without dead ends: 169 [2018-01-29 23:00:49,837 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-29 23:00:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-29 23:00:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2018-01-29 23:00:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-01-29 23:00:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 164 transitions. [2018-01-29 23:00:49,844 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 164 transitions. Word has length 127 [2018-01-29 23:00:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:49,844 INFO L432 AbstractCegarLoop]: Abstraction has 157 states and 164 transitions. [2018-01-29 23:00:49,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-29 23:00:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 164 transitions. [2018-01-29 23:00:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-01-29 23:00:49,845 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:49,845 INFO L350 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:49,845 INFO L371 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1627121904, now seen corresponding path program 5 times [2018-01-29 23:00:49,845 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:49,845 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:49,846 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:49,847 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:49,847 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:49,862 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-01-29 23:00:50,018 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:50,018 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:50,022 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:00:50,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,036 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,038 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,041 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,044 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,080 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:50,081 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:50,084 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-01-29 23:00:50,113 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:50,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-01-29 23:00:50,113 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-29 23:00:50,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-29 23:00:50,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-29 23:00:50,114 INFO L87 Difference]: Start difference. First operand 157 states and 164 transitions. Second operand 8 states. [2018-01-29 23:00:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:50,301 INFO L93 Difference]: Finished difference Result 322 states and 341 transitions. [2018-01-29 23:00:50,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-29 23:00:50,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 151 [2018-01-29 23:00:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:50,302 INFO L225 Difference]: With dead ends: 322 [2018-01-29 23:00:50,302 INFO L226 Difference]: Without dead ends: 193 [2018-01-29 23:00:50,303 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-29 23:00:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-01-29 23:00:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 181. [2018-01-29 23:00:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-01-29 23:00:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 188 transitions. [2018-01-29 23:00:50,308 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 188 transitions. Word has length 151 [2018-01-29 23:00:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:50,308 INFO L432 AbstractCegarLoop]: Abstraction has 181 states and 188 transitions. [2018-01-29 23:00:50,308 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-29 23:00:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 188 transitions. [2018-01-29 23:00:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-01-29 23:00:50,309 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:50,309 INFO L350 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:50,309 INFO L371 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1963472624, now seen corresponding path program 6 times [2018-01-29 23:00:50,310 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:50,310 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:50,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:50,310 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:50,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:50,326 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-01-29 23:00:50,667 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:50,667 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:50,671 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 23:00:50,677 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,691 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,699 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,711 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,724 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,732 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,745 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:50,751 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:50,753 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-01-29 23:00:50,793 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:50,793 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-01-29 23:00:50,793 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-29 23:00:50,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-29 23:00:50,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-29 23:00:50,794 INFO L87 Difference]: Start difference. First operand 181 states and 188 transitions. Second operand 9 states. [2018-01-29 23:00:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:51,064 INFO L93 Difference]: Finished difference Result 366 states and 385 transitions. [2018-01-29 23:00:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-29 23:00:51,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2018-01-29 23:00:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:51,065 INFO L225 Difference]: With dead ends: 366 [2018-01-29 23:00:51,065 INFO L226 Difference]: Without dead ends: 217 [2018-01-29 23:00:51,065 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-29 23:00:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-01-29 23:00:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 205. [2018-01-29 23:00:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-29 23:00:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2018-01-29 23:00:51,070 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 175 [2018-01-29 23:00:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:51,070 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2018-01-29 23:00:51,070 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-29 23:00:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2018-01-29 23:00:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-01-29 23:00:51,071 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:51,071 INFO L350 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:51,072 INFO L371 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1767377872, now seen corresponding path program 7 times [2018-01-29 23:00:51,072 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:51,072 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:51,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,072 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:51,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:51,086 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2018-01-29 23:00:51,173 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:51,173 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:51,180 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:51,199 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2018-01-29 23:00:51,253 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:51,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-01-29 23:00:51,254 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-29 23:00:51,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-29 23:00:51,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-29 23:00:51,254 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand 10 states. [2018-01-29 23:00:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:51,463 INFO L93 Difference]: Finished difference Result 410 states and 429 transitions. [2018-01-29 23:00:51,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-29 23:00:51,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 199 [2018-01-29 23:00:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:51,464 INFO L225 Difference]: With dead ends: 410 [2018-01-29 23:00:51,464 INFO L226 Difference]: Without dead ends: 241 [2018-01-29 23:00:51,464 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-29 23:00:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-01-29 23:00:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2018-01-29 23:00:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-01-29 23:00:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 236 transitions. [2018-01-29 23:00:51,468 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 236 transitions. Word has length 199 [2018-01-29 23:00:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:51,468 INFO L432 AbstractCegarLoop]: Abstraction has 229 states and 236 transitions. [2018-01-29 23:00:51,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-29 23:00:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 236 transitions. [2018-01-29 23:00:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-01-29 23:00:51,471 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:51,471 INFO L350 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:51,471 INFO L371 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1804408240, now seen corresponding path program 8 times [2018-01-29 23:00:51,471 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:51,471 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:51,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,472 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:51,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:51,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-01-29 23:00:51,600 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:51,600 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:51,606 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:00:51,613 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:51,630 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:51,636 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:51,638 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-01-29 23:00:51,672 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:51,673 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-01-29 23:00:51,673 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-29 23:00:51,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-29 23:00:51,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-29 23:00:51,673 INFO L87 Difference]: Start difference. First operand 229 states and 236 transitions. Second operand 11 states. [2018-01-29 23:00:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:51,882 INFO L93 Difference]: Finished difference Result 454 states and 473 transitions. [2018-01-29 23:00:51,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-29 23:00:51,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 223 [2018-01-29 23:00:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:51,883 INFO L225 Difference]: With dead ends: 454 [2018-01-29 23:00:51,883 INFO L226 Difference]: Without dead ends: 265 [2018-01-29 23:00:51,883 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-29 23:00:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-01-29 23:00:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 253. [2018-01-29 23:00:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-01-29 23:00:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 260 transitions. [2018-01-29 23:00:51,889 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 260 transitions. Word has length 223 [2018-01-29 23:00:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:51,889 INFO L432 AbstractCegarLoop]: Abstraction has 253 states and 260 transitions. [2018-01-29 23:00:51,889 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-29 23:00:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 260 transitions. [2018-01-29 23:00:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-01-29 23:00:51,892 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:51,892 INFO L350 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:51,892 INFO L371 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1208013968, now seen corresponding path program 9 times [2018-01-29 23:00:51,892 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:51,892 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:51,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,893 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:51,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:51,905 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2018-01-29 23:00:52,039 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:52,039 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:52,044 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:00:52,051 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,053 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,061 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,071 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,081 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,091 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,101 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,111 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,125 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,133 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:00:52,141 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:52,144 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2018-01-29 23:00:52,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:52,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-01-29 23:00:52,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-29 23:00:52,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-29 23:00:52,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-29 23:00:52,184 INFO L87 Difference]: Start difference. First operand 253 states and 260 transitions. Second operand 12 states. [2018-01-29 23:00:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:52,372 INFO L93 Difference]: Finished difference Result 498 states and 517 transitions. [2018-01-29 23:00:52,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-29 23:00:52,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 247 [2018-01-29 23:00:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:52,373 INFO L225 Difference]: With dead ends: 498 [2018-01-29 23:00:52,373 INFO L226 Difference]: Without dead ends: 289 [2018-01-29 23:00:52,373 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-29 23:00:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-01-29 23:00:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 277. [2018-01-29 23:00:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-01-29 23:00:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2018-01-29 23:00:52,377 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 247 [2018-01-29 23:00:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:52,377 INFO L432 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2018-01-29 23:00:52,377 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-29 23:00:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2018-01-29 23:00:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-01-29 23:00:52,379 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:52,379 INFO L350 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:52,379 INFO L371 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:52,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2016622480, now seen corresponding path program 10 times [2018-01-29 23:00:52,379 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:52,379 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:52,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:52,380 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:52,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:52,391 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-01-29 23:00:52,551 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:52,551 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:52,556 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:00:52,580 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:52,582 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-01-29 23:00:52,631 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:52,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-01-29 23:00:52,631 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-29 23:00:52,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-29 23:00:52,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-29 23:00:52,632 INFO L87 Difference]: Start difference. First operand 277 states and 284 transitions. Second operand 13 states. [2018-01-29 23:00:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:53,353 INFO L93 Difference]: Finished difference Result 542 states and 561 transitions. [2018-01-29 23:00:53,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-29 23:00:53,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 271 [2018-01-29 23:00:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:53,362 INFO L225 Difference]: With dead ends: 542 [2018-01-29 23:00:53,362 INFO L226 Difference]: Without dead ends: 313 [2018-01-29 23:00:53,363 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-29 23:00:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-01-29 23:00:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2018-01-29 23:00:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-01-29 23:00:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 308 transitions. [2018-01-29 23:00:53,366 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 308 transitions. Word has length 271 [2018-01-29 23:00:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:53,366 INFO L432 AbstractCegarLoop]: Abstraction has 301 states and 308 transitions. [2018-01-29 23:00:53,366 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-29 23:00:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 308 transitions. [2018-01-29 23:00:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-01-29 23:00:53,367 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:53,367 INFO L350 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:53,368 INFO L371 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1355444560, now seen corresponding path program 11 times [2018-01-29 23:00:53,368 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:53,368 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:53,368 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:53,368 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:53,368 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:53,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-01-29 23:00:53,537 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:53,537 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:53,542 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:00:53,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,553 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,556 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,561 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,578 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,591 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,599 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,603 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,614 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:53,621 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:54,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:54,115 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:54,119 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-01-29 23:00:54,176 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:54,177 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-01-29 23:00:54,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-29 23:00:54,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-29 23:00:54,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-29 23:00:54,177 INFO L87 Difference]: Start difference. First operand 301 states and 308 transitions. Second operand 14 states. [2018-01-29 23:00:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:54,420 INFO L93 Difference]: Finished difference Result 586 states and 605 transitions. [2018-01-29 23:00:54,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-29 23:00:54,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 295 [2018-01-29 23:00:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:54,421 INFO L225 Difference]: With dead ends: 586 [2018-01-29 23:00:54,421 INFO L226 Difference]: Without dead ends: 337 [2018-01-29 23:00:54,422 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-29 23:00:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-01-29 23:00:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2018-01-29 23:00:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-01-29 23:00:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 332 transitions. [2018-01-29 23:00:54,427 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 332 transitions. Word has length 295 [2018-01-29 23:00:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:54,428 INFO L432 AbstractCegarLoop]: Abstraction has 325 states and 332 transitions. [2018-01-29 23:00:54,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-29 23:00:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 332 transitions. [2018-01-29 23:00:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-01-29 23:00:54,429 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:54,429 INFO L350 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:54,429 INFO L371 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1167281968, now seen corresponding path program 12 times [2018-01-29 23:00:54,429 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:54,429 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:54,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:54,434 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:54,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:54,458 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2018-01-29 23:00:54,685 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:54,685 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:54,690 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 23:00:54,697 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,699 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,701 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,704 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,706 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,708 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,711 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,714 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,718 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,722 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,729 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,734 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,746 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:00:54,747 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:54,750 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2018-01-29 23:00:54,813 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:54,813 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-01-29 23:00:54,813 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-29 23:00:54,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-29 23:00:54,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-29 23:00:54,814 INFO L87 Difference]: Start difference. First operand 325 states and 332 transitions. Second operand 15 states. [2018-01-29 23:00:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:55,063 INFO L93 Difference]: Finished difference Result 630 states and 649 transitions. [2018-01-29 23:00:55,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-29 23:00:55,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 319 [2018-01-29 23:00:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:55,064 INFO L225 Difference]: With dead ends: 630 [2018-01-29 23:00:55,064 INFO L226 Difference]: Without dead ends: 361 [2018-01-29 23:00:55,065 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-29 23:00:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-01-29 23:00:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 349. [2018-01-29 23:00:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-01-29 23:00:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 356 transitions. [2018-01-29 23:00:55,069 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 356 transitions. Word has length 319 [2018-01-29 23:00:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:55,069 INFO L432 AbstractCegarLoop]: Abstraction has 349 states and 356 transitions. [2018-01-29 23:00:55,069 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-29 23:00:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 356 transitions. [2018-01-29 23:00:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-01-29 23:00:55,070 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:55,071 INFO L350 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:55,071 INFO L371 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1702945296, now seen corresponding path program 13 times [2018-01-29 23:00:55,071 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:55,071 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:55,071 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:55,072 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:55,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:55,082 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2018-01-29 23:00:57,067 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:57,067 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:57,071 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:57,100 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2018-01-29 23:00:57,173 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:57,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-01-29 23:00:57,173 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-29 23:00:57,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-29 23:00:57,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-29 23:00:57,174 INFO L87 Difference]: Start difference. First operand 349 states and 356 transitions. Second operand 16 states. [2018-01-29 23:00:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:57,505 INFO L93 Difference]: Finished difference Result 674 states and 693 transitions. [2018-01-29 23:00:57,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-29 23:00:57,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 343 [2018-01-29 23:00:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:57,521 INFO L225 Difference]: With dead ends: 674 [2018-01-29 23:00:57,521 INFO L226 Difference]: Without dead ends: 385 [2018-01-29 23:00:57,521 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-29 23:00:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-01-29 23:00:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 373. [2018-01-29 23:00:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-01-29 23:00:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 380 transitions. [2018-01-29 23:00:57,525 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 380 transitions. Word has length 343 [2018-01-29 23:00:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:57,525 INFO L432 AbstractCegarLoop]: Abstraction has 373 states and 380 transitions. [2018-01-29 23:00:57,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-29 23:00:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 380 transitions. [2018-01-29 23:00:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-01-29 23:00:57,526 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:57,527 INFO L350 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:57,527 INFO L371 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash -324228624, now seen corresponding path program 14 times [2018-01-29 23:00:57,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:57,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:57,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:57,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:00:57,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:57,538 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:00:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2018-01-29 23:00:58,383 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:00:58,383 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:00:58,388 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:00:58,396 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:58,420 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:00:58,430 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:00:58,432 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:00:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2018-01-29 23:00:58,500 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:00:58,500 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-01-29 23:00:58,500 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-29 23:00:58,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-29 23:00:58,500 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-29 23:00:58,500 INFO L87 Difference]: Start difference. First operand 373 states and 380 transitions. Second operand 17 states. [2018-01-29 23:00:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:00:58,794 INFO L93 Difference]: Finished difference Result 718 states and 737 transitions. [2018-01-29 23:00:58,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-29 23:00:58,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 367 [2018-01-29 23:00:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:00:58,795 INFO L225 Difference]: With dead ends: 718 [2018-01-29 23:00:58,795 INFO L226 Difference]: Without dead ends: 409 [2018-01-29 23:00:58,796 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-29 23:00:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-01-29 23:00:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2018-01-29 23:00:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2018-01-29 23:00:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 404 transitions. [2018-01-29 23:00:58,800 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 404 transitions. Word has length 367 [2018-01-29 23:00:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:00:58,800 INFO L432 AbstractCegarLoop]: Abstraction has 397 states and 404 transitions. [2018-01-29 23:00:58,800 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-29 23:00:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 404 transitions. [2018-01-29 23:00:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-01-29 23:00:58,801 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:00:58,801 INFO L350 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:00:58,801 INFO L371 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:00:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 871376592, now seen corresponding path program 15 times [2018-01-29 23:00:58,801 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:00:58,801 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:00:58,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:58,802 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:00:58,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:00:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:00:58,813 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 2250 trivial. 0 not checked. [2018-01-29 23:01:00,068 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:00,068 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:00,073 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:01:00,081 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,091 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,093 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,096 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,099 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,102 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,108 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,113 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,120 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,126 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,136 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,147 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,159 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,171 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,186 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,207 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:00,208 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:00,211 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 2250 trivial. 0 not checked. [2018-01-29 23:01:00,282 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:00,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-01-29 23:01:00,283 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-29 23:01:00,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-29 23:01:00,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-29 23:01:00,283 INFO L87 Difference]: Start difference. First operand 397 states and 404 transitions. Second operand 18 states. [2018-01-29 23:01:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:00,525 INFO L93 Difference]: Finished difference Result 762 states and 781 transitions. [2018-01-29 23:01:00,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 23:01:00,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 391 [2018-01-29 23:01:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:00,526 INFO L225 Difference]: With dead ends: 762 [2018-01-29 23:01:00,526 INFO L226 Difference]: Without dead ends: 433 [2018-01-29 23:01:00,527 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-29 23:01:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-01-29 23:01:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 421. [2018-01-29 23:01:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2018-01-29 23:01:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 428 transitions. [2018-01-29 23:01:00,531 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 428 transitions. Word has length 391 [2018-01-29 23:01:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:00,532 INFO L432 AbstractCegarLoop]: Abstraction has 421 states and 428 transitions. [2018-01-29 23:01:00,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-29 23:01:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 428 transitions. [2018-01-29 23:01:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-01-29 23:01:00,533 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:00,533 INFO L350 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:00,533 INFO L371 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1864050512, now seen corresponding path program 16 times [2018-01-29 23:01:00,534 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:00,534 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:00,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:00,534 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:00,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:00,545 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 2560 trivial. 0 not checked. [2018-01-29 23:01:01,281 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:01,281 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:01,285 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:01:01,326 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:01,329 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 2560 trivial. 0 not checked. [2018-01-29 23:01:01,409 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:01,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-01-29 23:01:01,410 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-29 23:01:01,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-29 23:01:01,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-29 23:01:01,410 INFO L87 Difference]: Start difference. First operand 421 states and 428 transitions. Second operand 19 states. [2018-01-29 23:01:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:02,538 INFO L93 Difference]: Finished difference Result 806 states and 825 transitions. [2018-01-29 23:01:02,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-29 23:01:02,538 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 415 [2018-01-29 23:01:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:02,540 INFO L225 Difference]: With dead ends: 806 [2018-01-29 23:01:02,540 INFO L226 Difference]: Without dead ends: 457 [2018-01-29 23:01:02,541 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-29 23:01:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-01-29 23:01:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 445. [2018-01-29 23:01:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-01-29 23:01:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 452 transitions. [2018-01-29 23:01:02,545 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 452 transitions. Word has length 415 [2018-01-29 23:01:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:02,545 INFO L432 AbstractCegarLoop]: Abstraction has 445 states and 452 transitions. [2018-01-29 23:01:02,545 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-29 23:01:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 452 transitions. [2018-01-29 23:01:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-01-29 23:01:02,546 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:02,547 INFO L350 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:02,547 INFO L371 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash 904150928, now seen corresponding path program 17 times [2018-01-29 23:01:02,547 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:02,547 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:02,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:02,548 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:02,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:02,559 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 2890 trivial. 0 not checked. [2018-01-29 23:01:03,156 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:03,156 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:03,161 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:01:03,169 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,171 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,173 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,178 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,181 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,185 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,194 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,200 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,207 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,214 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,234 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,246 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,259 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:03,275 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:04,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:04,181 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:04,187 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 2890 trivial. 0 not checked. [2018-01-29 23:01:04,264 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:04,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-01-29 23:01:04,265 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-29 23:01:04,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-29 23:01:04,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-29 23:01:04,265 INFO L87 Difference]: Start difference. First operand 445 states and 452 transitions. Second operand 20 states. [2018-01-29 23:01:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:04,507 INFO L93 Difference]: Finished difference Result 850 states and 869 transitions. [2018-01-29 23:01:04,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-29 23:01:04,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 439 [2018-01-29 23:01:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:04,508 INFO L225 Difference]: With dead ends: 850 [2018-01-29 23:01:04,508 INFO L226 Difference]: Without dead ends: 481 [2018-01-29 23:01:04,509 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-29 23:01:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2018-01-29 23:01:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 469. [2018-01-29 23:01:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-01-29 23:01:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 476 transitions. [2018-01-29 23:01:04,513 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 476 transitions. Word has length 439 [2018-01-29 23:01:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:04,513 INFO L432 AbstractCegarLoop]: Abstraction has 469 states and 476 transitions. [2018-01-29 23:01:04,513 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-29 23:01:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 476 transitions. [2018-01-29 23:01:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-01-29 23:01:04,514 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:04,515 INFO L350 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:04,515 INFO L371 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash 302504816, now seen corresponding path program 18 times [2018-01-29 23:01:04,515 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:04,515 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:04,515 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:04,515 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:04,515 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:04,527 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2018-01-29 23:01:04,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:04,921 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:04,926 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 23:01:04,935 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,937 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,939 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,941 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,943 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,946 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,949 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,952 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,955 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,959 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,965 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,974 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,982 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,989 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:04,997 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:05,007 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:05,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:05,495 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:05,740 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:05,741 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:05,746 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2018-01-29 23:01:05,831 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:05,832 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-01-29 23:01:05,832 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 23:01:05,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 23:01:05,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-29 23:01:05,832 INFO L87 Difference]: Start difference. First operand 469 states and 476 transitions. Second operand 21 states. [2018-01-29 23:01:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:06,606 INFO L93 Difference]: Finished difference Result 894 states and 913 transitions. [2018-01-29 23:01:06,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-29 23:01:06,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2018-01-29 23:01:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:06,607 INFO L225 Difference]: With dead ends: 894 [2018-01-29 23:01:06,607 INFO L226 Difference]: Without dead ends: 505 [2018-01-29 23:01:06,608 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-29 23:01:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2018-01-29 23:01:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 493. [2018-01-29 23:01:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2018-01-29 23:01:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 500 transitions. [2018-01-29 23:01:06,616 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 500 transitions. Word has length 463 [2018-01-29 23:01:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:06,616 INFO L432 AbstractCegarLoop]: Abstraction has 493 states and 500 transitions. [2018-01-29 23:01:06,616 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 23:01:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 500 transitions. [2018-01-29 23:01:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-01-29 23:01:06,618 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:06,618 INFO L350 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:06,618 INFO L371 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1322701744, now seen corresponding path program 19 times [2018-01-29 23:01:06,618 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:06,618 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:06,618 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:06,619 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:06,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:06,630 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2018-01-29 23:01:07,031 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:07,031 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:07,037 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:07,076 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2018-01-29 23:01:07,163 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:07,163 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-01-29 23:01:07,163 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-29 23:01:07,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-29 23:01:07,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-29 23:01:07,164 INFO L87 Difference]: Start difference. First operand 493 states and 500 transitions. Second operand 22 states. [2018-01-29 23:01:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:07,450 INFO L93 Difference]: Finished difference Result 938 states and 957 transitions. [2018-01-29 23:01:07,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-29 23:01:07,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 487 [2018-01-29 23:01:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:07,452 INFO L225 Difference]: With dead ends: 938 [2018-01-29 23:01:07,452 INFO L226 Difference]: Without dead ends: 529 [2018-01-29 23:01:07,452 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-29 23:01:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2018-01-29 23:01:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 517. [2018-01-29 23:01:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2018-01-29 23:01:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 524 transitions. [2018-01-29 23:01:07,463 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 524 transitions. Word has length 487 [2018-01-29 23:01:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:07,463 INFO L432 AbstractCegarLoop]: Abstraction has 517 states and 524 transitions. [2018-01-29 23:01:07,463 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-29 23:01:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 524 transitions. [2018-01-29 23:01:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2018-01-29 23:01:07,465 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:07,465 INFO L350 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:07,465 INFO L371 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 467776048, now seen corresponding path program 20 times [2018-01-29 23:01:07,465 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:07,465 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:07,466 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:07,466 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:07,466 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:07,479 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 4000 trivial. 0 not checked. [2018-01-29 23:01:07,922 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:07,922 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:07,927 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:01:07,949 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:07,977 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:07,990 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:07,992 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 4000 trivial. 0 not checked. [2018-01-29 23:01:08,093 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:08,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-01-29 23:01:08,094 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-29 23:01:08,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-29 23:01:08,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-29 23:01:08,094 INFO L87 Difference]: Start difference. First operand 517 states and 524 transitions. Second operand 23 states. [2018-01-29 23:01:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:08,383 INFO L93 Difference]: Finished difference Result 982 states and 1001 transitions. [2018-01-29 23:01:08,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-29 23:01:08,385 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 511 [2018-01-29 23:01:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:08,387 INFO L225 Difference]: With dead ends: 982 [2018-01-29 23:01:08,387 INFO L226 Difference]: Without dead ends: 553 [2018-01-29 23:01:08,387 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-29 23:01:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2018-01-29 23:01:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 541. [2018-01-29 23:01:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2018-01-29 23:01:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 548 transitions. [2018-01-29 23:01:08,391 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 548 transitions. Word has length 511 [2018-01-29 23:01:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:08,391 INFO L432 AbstractCegarLoop]: Abstraction has 541 states and 548 transitions. [2018-01-29 23:01:08,391 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-29 23:01:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 548 transitions. [2018-01-29 23:01:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2018-01-29 23:01:08,393 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:08,393 INFO L350 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:08,393 INFO L371 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1215632112, now seen corresponding path program 21 times [2018-01-29 23:01:08,394 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:08,394 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:08,394 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:08,394 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:08,394 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:08,407 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5292 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2018-01-29 23:01:08,923 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:08,923 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:08,927 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:01:08,938 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,940 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,942 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,944 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,947 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,950 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,956 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,961 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,966 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,972 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,984 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:08,995 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,007 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,019 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,035 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,053 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,078 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,099 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,129 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,164 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,200 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,239 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:09,241 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:09,246 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5292 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2018-01-29 23:01:09,343 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:09,343 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-01-29 23:01:09,344 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-29 23:01:09,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-29 23:01:09,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-29 23:01:09,344 INFO L87 Difference]: Start difference. First operand 541 states and 548 transitions. Second operand 24 states. [2018-01-29 23:01:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:09,705 INFO L93 Difference]: Finished difference Result 1026 states and 1045 transitions. [2018-01-29 23:01:09,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-29 23:01:09,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 535 [2018-01-29 23:01:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:09,708 INFO L225 Difference]: With dead ends: 1026 [2018-01-29 23:01:09,708 INFO L226 Difference]: Without dead ends: 577 [2018-01-29 23:01:09,709 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-29 23:01:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2018-01-29 23:01:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 565. [2018-01-29 23:01:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2018-01-29 23:01:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 572 transitions. [2018-01-29 23:01:09,713 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 572 transitions. Word has length 535 [2018-01-29 23:01:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:09,713 INFO L432 AbstractCegarLoop]: Abstraction has 565 states and 572 transitions. [2018-01-29 23:01:09,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-29 23:01:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 572 transitions. [2018-01-29 23:01:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-01-29 23:01:09,720 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:09,721 INFO L350 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:09,721 INFO L371 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash 641621232, now seen corresponding path program 22 times [2018-01-29 23:01:09,721 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:09,721 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:09,721 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:09,721 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:09,722 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:09,738 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-01-29 23:01:10,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:10,350 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:10,356 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:01:10,397 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:10,400 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-01-29 23:01:10,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:10,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-01-29 23:01:10,520 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-29 23:01:10,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-29 23:01:10,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-01-29 23:01:10,521 INFO L87 Difference]: Start difference. First operand 565 states and 572 transitions. Second operand 25 states. [2018-01-29 23:01:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:10,853 INFO L93 Difference]: Finished difference Result 1070 states and 1089 transitions. [2018-01-29 23:01:10,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-29 23:01:10,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 559 [2018-01-29 23:01:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:10,854 INFO L225 Difference]: With dead ends: 1070 [2018-01-29 23:01:10,854 INFO L226 Difference]: Without dead ends: 601 [2018-01-29 23:01:10,855 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-01-29 23:01:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-01-29 23:01:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 589. [2018-01-29 23:01:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2018-01-29 23:01:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 596 transitions. [2018-01-29 23:01:10,859 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 596 transitions. Word has length 559 [2018-01-29 23:01:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:10,860 INFO L432 AbstractCegarLoop]: Abstraction has 589 states and 596 transitions. [2018-01-29 23:01:10,860 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-29 23:01:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 596 transitions. [2018-01-29 23:01:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-01-29 23:01:10,862 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:10,862 INFO L350 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:10,862 INFO L371 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash 651526608, now seen corresponding path program 23 times [2018-01-29 23:01:10,862 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:10,862 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:10,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:10,863 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:10,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:10,876 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 5290 trivial. 0 not checked. [2018-01-29 23:01:11,488 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:11,488 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:11,509 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:01:11,520 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,531 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,536 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,538 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,540 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,543 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,556 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,561 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,568 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,584 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,594 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,606 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,620 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,635 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,653 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,697 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,723 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,753 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:11,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:13,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:13,976 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:13,983 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 5290 trivial. 0 not checked. [2018-01-29 23:01:14,112 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:14,112 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-01-29 23:01:14,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-29 23:01:14,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-29 23:01:14,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-29 23:01:14,113 INFO L87 Difference]: Start difference. First operand 589 states and 596 transitions. Second operand 26 states. [2018-01-29 23:01:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:14,798 INFO L93 Difference]: Finished difference Result 1114 states and 1133 transitions. [2018-01-29 23:01:14,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-29 23:01:14,798 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 583 [2018-01-29 23:01:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:14,800 INFO L225 Difference]: With dead ends: 1114 [2018-01-29 23:01:14,800 INFO L226 Difference]: Without dead ends: 625 [2018-01-29 23:01:14,801 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-29 23:01:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2018-01-29 23:01:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 613. [2018-01-29 23:01:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2018-01-29 23:01:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 620 transitions. [2018-01-29 23:01:14,806 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 620 transitions. Word has length 583 [2018-01-29 23:01:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:14,807 INFO L432 AbstractCegarLoop]: Abstraction has 613 states and 620 transitions. [2018-01-29 23:01:14,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-29 23:01:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 620 transitions. [2018-01-29 23:01:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-01-29 23:01:14,809 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:14,809 INFO L350 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:14,810 INFO L371 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1961483184, now seen corresponding path program 24 times [2018-01-29 23:01:14,810 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:14,810 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:14,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:14,810 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:14,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:14,825 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6912 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2018-01-29 23:01:15,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:15,793 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:15,798 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 23:01:15,815 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,820 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,822 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,824 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,831 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,833 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,836 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,839 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,847 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,853 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,859 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,902 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,912 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,925 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,937 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,951 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,970 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:15,990 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:16,641 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:17,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:17,181 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:17,188 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6912 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2018-01-29 23:01:17,306 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:17,307 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-01-29 23:01:17,307 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-29 23:01:17,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-29 23:01:17,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-01-29 23:01:17,307 INFO L87 Difference]: Start difference. First operand 613 states and 620 transitions. Second operand 27 states. [2018-01-29 23:01:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:17,769 INFO L93 Difference]: Finished difference Result 1158 states and 1177 transitions. [2018-01-29 23:01:17,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-29 23:01:17,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 607 [2018-01-29 23:01:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:17,772 INFO L225 Difference]: With dead ends: 1158 [2018-01-29 23:01:17,773 INFO L226 Difference]: Without dead ends: 649 [2018-01-29 23:01:17,773 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-01-29 23:01:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2018-01-29 23:01:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 637. [2018-01-29 23:01:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2018-01-29 23:01:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 644 transitions. [2018-01-29 23:01:17,778 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 644 transitions. Word has length 607 [2018-01-29 23:01:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:17,778 INFO L432 AbstractCegarLoop]: Abstraction has 637 states and 644 transitions. [2018-01-29 23:01:17,778 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-29 23:01:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 644 transitions. [2018-01-29 23:01:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2018-01-29 23:01:17,781 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:17,781 INFO L350 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:17,781 INFO L371 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1462441328, now seen corresponding path program 25 times [2018-01-29 23:01:17,781 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:17,781 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:17,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:17,782 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:17,782 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:17,796 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 6250 trivial. 0 not checked. [2018-01-29 23:01:18,701 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:18,701 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:18,706 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:18,755 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 6250 trivial. 0 not checked. [2018-01-29 23:01:18,890 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:18,890 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-01-29 23:01:18,891 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-29 23:01:18,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-29 23:01:18,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-01-29 23:01:18,891 INFO L87 Difference]: Start difference. First operand 637 states and 644 transitions. Second operand 28 states. [2018-01-29 23:01:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:19,246 INFO L93 Difference]: Finished difference Result 1202 states and 1221 transitions. [2018-01-29 23:01:19,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-29 23:01:19,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 631 [2018-01-29 23:01:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:19,248 INFO L225 Difference]: With dead ends: 1202 [2018-01-29 23:01:19,248 INFO L226 Difference]: Without dead ends: 673 [2018-01-29 23:01:19,249 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-01-29 23:01:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2018-01-29 23:01:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 661. [2018-01-29 23:01:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2018-01-29 23:01:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 668 transitions. [2018-01-29 23:01:19,260 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 668 transitions. Word has length 631 [2018-01-29 23:01:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:19,260 INFO L432 AbstractCegarLoop]: Abstraction has 661 states and 668 transitions. [2018-01-29 23:01:19,260 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-29 23:01:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 668 transitions. [2018-01-29 23:01:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-01-29 23:01:19,263 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:19,263 INFO L350 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:19,263 INFO L371 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash 397422192, now seen corresponding path program 26 times [2018-01-29 23:01:19,263 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:19,263 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:19,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:19,264 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:19,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:19,278 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8112 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 6760 trivial. 0 not checked. [2018-01-29 23:01:20,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:20,382 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:20,387 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:01:20,399 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:20,429 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:20,434 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:20,437 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8112 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 6760 trivial. 0 not checked. [2018-01-29 23:01:20,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:20,584 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-01-29 23:01:20,584 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-29 23:01:20,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-29 23:01:20,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-29 23:01:20,585 INFO L87 Difference]: Start difference. First operand 661 states and 668 transitions. Second operand 29 states. [2018-01-29 23:01:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:20,953 INFO L93 Difference]: Finished difference Result 1246 states and 1265 transitions. [2018-01-29 23:01:20,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-29 23:01:20,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 655 [2018-01-29 23:01:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:20,955 INFO L225 Difference]: With dead ends: 1246 [2018-01-29 23:01:20,955 INFO L226 Difference]: Without dead ends: 697 [2018-01-29 23:01:20,956 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-29 23:01:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2018-01-29 23:01:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 685. [2018-01-29 23:01:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2018-01-29 23:01:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 692 transitions. [2018-01-29 23:01:20,960 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 692 transitions. Word has length 655 [2018-01-29 23:01:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:20,960 INFO L432 AbstractCegarLoop]: Abstraction has 685 states and 692 transitions. [2018-01-29 23:01:20,960 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-29 23:01:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 692 transitions. [2018-01-29 23:01:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2018-01-29 23:01:20,963 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:20,963 INFO L350 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:20,963 INFO L371 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:20,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1286265008, now seen corresponding path program 27 times [2018-01-29 23:01:20,963 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:20,963 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:20,964 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:20,964 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:20,964 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:20,978 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8748 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 7290 trivial. 0 not checked. [2018-01-29 23:01:21,777 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:21,777 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:21,781 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:01:21,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,796 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,800 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,806 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,811 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,816 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,822 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,831 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,839 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,851 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,861 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,911 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,933 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,955 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:21,982 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,018 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,056 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,095 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,146 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,206 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,265 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,402 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,496 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:22,498 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:22,504 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8748 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 7290 trivial. 0 not checked. [2018-01-29 23:01:22,648 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:22,648 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-01-29 23:01:22,649 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-29 23:01:22,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-29 23:01:22,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-29 23:01:22,649 INFO L87 Difference]: Start difference. First operand 685 states and 692 transitions. Second operand 30 states. [2018-01-29 23:01:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:23,053 INFO L93 Difference]: Finished difference Result 1290 states and 1309 transitions. [2018-01-29 23:01:23,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 23:01:23,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 679 [2018-01-29 23:01:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:23,054 INFO L225 Difference]: With dead ends: 1290 [2018-01-29 23:01:23,054 INFO L226 Difference]: Without dead ends: 721 [2018-01-29 23:01:23,055 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-29 23:01:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2018-01-29 23:01:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 709. [2018-01-29 23:01:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2018-01-29 23:01:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 716 transitions. [2018-01-29 23:01:23,065 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 716 transitions. Word has length 679 [2018-01-29 23:01:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:23,065 INFO L432 AbstractCegarLoop]: Abstraction has 709 states and 716 transitions. [2018-01-29 23:01:23,065 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-29 23:01:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 716 transitions. [2018-01-29 23:01:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2018-01-29 23:01:23,068 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:23,068 INFO L350 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:23,068 INFO L371 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -362982096, now seen corresponding path program 28 times [2018-01-29 23:01:23,068 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:23,068 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:23,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:23,069 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:23,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:23,083 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9408 backedges. 0 proven. 1568 refuted. 0 times theorem prover too weak. 7840 trivial. 0 not checked. [2018-01-29 23:01:23,949 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:23,949 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:23,955 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:01:24,007 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:24,010 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9408 backedges. 0 proven. 1568 refuted. 0 times theorem prover too weak. 7840 trivial. 0 not checked. [2018-01-29 23:01:24,163 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:24,163 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-01-29 23:01:24,164 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-29 23:01:24,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-29 23:01:24,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-01-29 23:01:24,164 INFO L87 Difference]: Start difference. First operand 709 states and 716 transitions. Second operand 31 states. [2018-01-29 23:01:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:24,561 INFO L93 Difference]: Finished difference Result 1334 states and 1353 transitions. [2018-01-29 23:01:24,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-29 23:01:24,561 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 703 [2018-01-29 23:01:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:24,562 INFO L225 Difference]: With dead ends: 1334 [2018-01-29 23:01:24,563 INFO L226 Difference]: Without dead ends: 745 [2018-01-29 23:01:24,563 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-01-29 23:01:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2018-01-29 23:01:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 733. [2018-01-29 23:01:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2018-01-29 23:01:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 740 transitions. [2018-01-29 23:01:24,568 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 740 transitions. Word has length 703 [2018-01-29 23:01:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:24,568 INFO L432 AbstractCegarLoop]: Abstraction has 733 states and 740 transitions. [2018-01-29 23:01:24,568 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-29 23:01:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 740 transitions. [2018-01-29 23:01:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-01-29 23:01:24,571 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:24,571 INFO L350 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:24,571 INFO L371 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2011023344, now seen corresponding path program 29 times [2018-01-29 23:01:24,571 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:24,571 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:24,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:24,572 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:24,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:24,586 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10092 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 8410 trivial. 0 not checked. [2018-01-29 23:01:25,749 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:25,749 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:25,753 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:01:25,766 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,768 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,770 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,775 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,778 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,781 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,830 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,841 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,855 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,889 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,909 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,933 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,959 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:25,990 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,025 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,064 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,157 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,212 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:26,343 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:38,405 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:38,413 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:38,424 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10092 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 8410 trivial. 0 not checked. [2018-01-29 23:01:38,617 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:38,618 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-01-29 23:01:38,618 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-29 23:01:38,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-29 23:01:38,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-29 23:01:38,619 INFO L87 Difference]: Start difference. First operand 733 states and 740 transitions. Second operand 32 states. [2018-01-29 23:01:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:39,017 INFO L93 Difference]: Finished difference Result 1378 states and 1397 transitions. [2018-01-29 23:01:39,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-29 23:01:39,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 727 [2018-01-29 23:01:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:39,018 INFO L225 Difference]: With dead ends: 1378 [2018-01-29 23:01:39,018 INFO L226 Difference]: Without dead ends: 769 [2018-01-29 23:01:39,019 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-29 23:01:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2018-01-29 23:01:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 757. [2018-01-29 23:01:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2018-01-29 23:01:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 764 transitions. [2018-01-29 23:01:39,023 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 764 transitions. Word has length 727 [2018-01-29 23:01:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:39,023 INFO L432 AbstractCegarLoop]: Abstraction has 757 states and 764 transitions. [2018-01-29 23:01:39,024 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-29 23:01:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 764 transitions. [2018-01-29 23:01:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2018-01-29 23:01:39,027 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:39,027 INFO L350 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:39,027 INFO L371 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1799532560, now seen corresponding path program 30 times [2018-01-29 23:01:39,027 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:39,027 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:39,028 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:39,028 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:39,028 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:39,043 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 9000 trivial. 0 not checked. [2018-01-29 23:01:40,674 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:40,674 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:40,679 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 23:01:40,691 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,693 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,695 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,697 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,700 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,702 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,705 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,708 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,711 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,715 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,721 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,730 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,736 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,742 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,755 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,762 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,770 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,782 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,796 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,808 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,826 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,840 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,900 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,928 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,953 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:40,983 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:41,020 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:41,053 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:41,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 23:01:41,159 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:41,166 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 9000 trivial. 0 not checked. [2018-01-29 23:01:41,329 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:41,329 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-01-29 23:01:41,329 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-29 23:01:41,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-29 23:01:41,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-01-29 23:01:41,330 INFO L87 Difference]: Start difference. First operand 757 states and 764 transitions. Second operand 33 states. [2018-01-29 23:01:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:41,741 INFO L93 Difference]: Finished difference Result 1422 states and 1441 transitions. [2018-01-29 23:01:41,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-29 23:01:41,741 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 751 [2018-01-29 23:01:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:41,743 INFO L225 Difference]: With dead ends: 1422 [2018-01-29 23:01:41,743 INFO L226 Difference]: Without dead ends: 793 [2018-01-29 23:01:41,744 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-01-29 23:01:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2018-01-29 23:01:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2018-01-29 23:01:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2018-01-29 23:01:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 788 transitions. [2018-01-29 23:01:41,748 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 788 transitions. Word has length 751 [2018-01-29 23:01:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:41,748 INFO L432 AbstractCegarLoop]: Abstraction has 781 states and 788 transitions. [2018-01-29 23:01:41,748 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-29 23:01:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 788 transitions. [2018-01-29 23:01:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2018-01-29 23:01:41,761 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:41,761 INFO L350 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:41,761 INFO L371 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash 889724112, now seen corresponding path program 31 times [2018-01-29 23:01:41,762 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:41,762 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:41,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:41,762 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:41,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:41,778 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11532 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 9610 trivial. 0 not checked. [2018-01-29 23:01:42,908 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:42,908 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:42,913 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:42,973 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11532 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 9610 trivial. 0 not checked. [2018-01-29 23:01:43,144 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:43,144 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-01-29 23:01:43,144 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-29 23:01:43,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-29 23:01:43,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-01-29 23:01:43,145 INFO L87 Difference]: Start difference. First operand 781 states and 788 transitions. Second operand 34 states. [2018-01-29 23:01:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:43,654 INFO L93 Difference]: Finished difference Result 1466 states and 1485 transitions. [2018-01-29 23:01:43,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-29 23:01:43,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 775 [2018-01-29 23:01:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:43,656 INFO L225 Difference]: With dead ends: 1466 [2018-01-29 23:01:43,656 INFO L226 Difference]: Without dead ends: 817 [2018-01-29 23:01:43,657 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-01-29 23:01:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2018-01-29 23:01:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 805. [2018-01-29 23:01:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2018-01-29 23:01:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 812 transitions. [2018-01-29 23:01:43,662 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 812 transitions. Word has length 775 [2018-01-29 23:01:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:43,663 INFO L432 AbstractCegarLoop]: Abstraction has 805 states and 812 transitions. [2018-01-29 23:01:43,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-29 23:01:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 812 transitions. [2018-01-29 23:01:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2018-01-29 23:01:43,666 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:43,666 INFO L350 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:43,666 INFO L371 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1969480016, now seen corresponding path program 32 times [2018-01-29 23:01:43,666 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:43,667 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:43,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:43,667 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 23:01:43,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:43,682 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12288 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 10240 trivial. 0 not checked. [2018-01-29 23:01:44,818 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:44,818 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:44,823 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 23:01:44,837 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:44,887 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:44,905 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:44,908 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12288 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 10240 trivial. 0 not checked. [2018-01-29 23:01:45,086 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:45,086 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-01-29 23:01:45,087 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-29 23:01:45,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-29 23:01:45,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 23:01:45,087 INFO L87 Difference]: Start difference. First operand 805 states and 812 transitions. Second operand 35 states. [2018-01-29 23:01:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:45,552 INFO L93 Difference]: Finished difference Result 1510 states and 1529 transitions. [2018-01-29 23:01:45,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-29 23:01:45,553 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 799 [2018-01-29 23:01:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:45,554 INFO L225 Difference]: With dead ends: 1510 [2018-01-29 23:01:45,554 INFO L226 Difference]: Without dead ends: 841 [2018-01-29 23:01:45,555 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 23:01:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2018-01-29 23:01:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 829. [2018-01-29 23:01:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2018-01-29 23:01:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 836 transitions. [2018-01-29 23:01:45,560 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 836 transitions. Word has length 799 [2018-01-29 23:01:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:45,560 INFO L432 AbstractCegarLoop]: Abstraction has 829 states and 836 transitions. [2018-01-29 23:01:45,560 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-29 23:01:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 836 transitions. [2018-01-29 23:01:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-01-29 23:01:45,563 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:45,564 INFO L350 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:45,564 INFO L371 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1814899312, now seen corresponding path program 33 times [2018-01-29 23:01:45,564 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:45,564 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:45,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:45,564 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:45,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:45,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13068 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 10890 trivial. 0 not checked. [2018-01-29 23:01:46,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:46,794 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:46,798 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 23:01:46,812 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,814 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,816 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,821 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,830 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,835 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,842 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,848 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,858 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,869 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,881 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,926 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,954 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:46,975 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,001 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,036 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,076 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,115 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,165 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,224 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,280 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,345 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,420 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,511 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,609 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,705 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:47,955 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:48,086 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:48,241 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 23:01:48,244 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:48,252 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13068 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 10890 trivial. 0 not checked. [2018-01-29 23:01:48,453 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:48,453 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-01-29 23:01:48,454 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-29 23:01:48,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-29 23:01:48,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 23:01:48,454 INFO L87 Difference]: Start difference. First operand 829 states and 836 transitions. Second operand 36 states. [2018-01-29 23:01:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:48,894 INFO L93 Difference]: Finished difference Result 1554 states and 1573 transitions. [2018-01-29 23:01:48,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-29 23:01:48,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 823 [2018-01-29 23:01:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:48,896 INFO L225 Difference]: With dead ends: 1554 [2018-01-29 23:01:48,896 INFO L226 Difference]: Without dead ends: 865 [2018-01-29 23:01:48,897 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 23:01:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2018-01-29 23:01:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 853. [2018-01-29 23:01:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-01-29 23:01:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 860 transitions. [2018-01-29 23:01:48,901 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 860 transitions. Word has length 823 [2018-01-29 23:01:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:48,901 INFO L432 AbstractCegarLoop]: Abstraction has 853 states and 860 transitions. [2018-01-29 23:01:48,901 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-29 23:01:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 860 transitions. [2018-01-29 23:01:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2018-01-29 23:01:48,905 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:48,905 INFO L350 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:48,905 INFO L371 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 197509488, now seen corresponding path program 34 times [2018-01-29 23:01:48,905 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:48,905 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:48,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:48,906 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:48,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:48,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 11560 trivial. 0 not checked. [2018-01-29 23:01:50,207 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:50,207 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:50,212 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 23:01:50,273 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 23:01:50,277 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 23:01:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 11560 trivial. 0 not checked. [2018-01-29 23:01:50,496 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 23:01:50,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-01-29 23:01:50,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-29 23:01:50,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-29 23:01:50,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-01-29 23:01:50,497 INFO L87 Difference]: Start difference. First operand 853 states and 860 transitions. Second operand 37 states. [2018-01-29 23:01:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 23:01:51,079 INFO L93 Difference]: Finished difference Result 1598 states and 1617 transitions. [2018-01-29 23:01:51,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-29 23:01:51,080 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 847 [2018-01-29 23:01:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 23:01:51,082 INFO L225 Difference]: With dead ends: 1598 [2018-01-29 23:01:51,082 INFO L226 Difference]: Without dead ends: 889 [2018-01-29 23:01:51,083 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-01-29 23:01:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2018-01-29 23:01:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 877. [2018-01-29 23:01:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2018-01-29 23:01:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 884 transitions. [2018-01-29 23:01:51,089 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 884 transitions. Word has length 847 [2018-01-29 23:01:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 23:01:51,089 INFO L432 AbstractCegarLoop]: Abstraction has 877 states and 884 transitions. [2018-01-29 23:01:51,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-29 23:01:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 884 transitions. [2018-01-29 23:01:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2018-01-29 23:01:51,092 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 23:01:51,092 INFO L350 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 23:01:51,093 INFO L371 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 23:01:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1246650960, now seen corresponding path program 35 times [2018-01-29 23:01:51,093 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 23:01:51,093 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 23:01:51,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:51,093 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 23:01:51,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 23:01:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 23:01:51,108 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 23:01:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14700 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 12250 trivial. 0 not checked. [2018-01-29 23:01:52,479 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 23:01:52,479 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 23:01:52,484 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 23:01:52,497 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,499 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,501 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,504 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,506 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,509 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,513 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,517 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,522 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,528 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,535 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,542 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,561 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,573 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,586 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,601 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,619 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,639 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,662 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,688 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,754 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,837 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,885 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:52,940 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,002 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,149 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,234 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,327 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 23:01:53,659 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown