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-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 11:51:33,219 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 11:51:33,221 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 11:51:33,237 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 11:51:33,238 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 11:51:33,239 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 11:51:33,240 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 11:51:33,241 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 11:51:33,244 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 11:51:33,245 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 11:51:33,245 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 11:51:33,246 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 11:51:33,247 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 11:51:33,248 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 11:51:33,249 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 11:51:33,252 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 11:51:33,254 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 11:51:33,256 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 11:51:33,257 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 11:51:33,259 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 11:51:33,261 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 11:51:33,261 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 11:51:33,262 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 11:51:33,263 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 11:51:33,264 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 11:51:33,265 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 11:51:33,265 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 11:51:33,266 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 11:51:33,266 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 11:51:33,266 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 11:51:33,267 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 11:51:33,267 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf [2018-01-24 11:51:33,275 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 11:51:33,276 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 11:51:33,277 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 11:51:33,277 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 11:51:33,277 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 11:51:33,277 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 11:51:33,277 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 11:51:33,277 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 11:51:33,278 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 11:51:33,279 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 11:51:33,279 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 11:51:33,279 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 11:51:33,279 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 11:51:33,279 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 11:51:33,279 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 11:51:33,280 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 11:51:33,280 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 11:51:33,280 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 11:51:33,280 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 11:51:33,280 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 11:51:33,281 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 11:51:33,282 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 11:51:33,282 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 11:51:33,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 11:51:33,349 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 11:51:33,354 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 11:51:33,357 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 11:51:33,357 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 11:51:33,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i [2018-01-24 11:51:33,571 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 11:51:33,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 11:51:33,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 11:51:33,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 11:51:33,582 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 11:51:33,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53037d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33, skipping insertion in model container [2018-01-24 11:51:33,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,598 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:51:33,635 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:51:33,754 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:51:33,772 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:51:33,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33 WrapperNode [2018-01-24 11:51:33,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 11:51:33,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 11:51:33,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 11:51:33,781 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 11:51:33,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... [2018-01-24 11:51:33,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 11:51:33,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 11:51:33,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 11:51:33,819 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 11:51:33,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (1/1) ... No working directory specified, using /storage/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 [2018-01-24 11:51:33,877 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 11:51:33,878 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 11:51:33,878 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-24 11:51:33,878 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 11:51:33,878 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 11:51:33,878 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 11:51:33,878 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-24 11:51:33,879 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 11:51:33,880 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 11:51:33,880 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 11:51:34,113 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 11:51:34,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:51:34 BoogieIcfgContainer [2018-01-24 11:51:34,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 11:51:34,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 11:51:34,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 11:51:34,117 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 11:51:34,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:51:33" (1/3) ... [2018-01-24 11:51:34,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ebad9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:51:34, skipping insertion in model container [2018-01-24 11:51:34,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:51:33" (2/3) ... [2018-01-24 11:51:34,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ebad9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:51:34, skipping insertion in model container [2018-01-24 11:51:34,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:51:34" (3/3) ... [2018-01-24 11:51:34,120 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i [2018-01-24 11:51:34,126 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 11:51:34,131 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2018-01-24 11:51:34,175 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 11:51:34,176 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 11:51:34,176 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 11:51:34,176 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 11:51:34,176 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 11:51:34,176 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 11:51:34,177 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 11:51:34,177 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 11:51:34,177 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 11:51:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-01-24 11:51:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 11:51:34,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:34,205 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:34,205 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1993989713, now seen corresponding path program 1 times [2018-01-24 11:51:34,213 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:34,213 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:34,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:34,258 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:34,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:34,324 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:34,482 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:51:34,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 11:51:34,485 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:51:34,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:51:34,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:51:34,504 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2018-01-24 11:51:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:34,858 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2018-01-24 11:51:34,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:51:34,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-01-24 11:51:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:34,868 INFO L225 Difference]: With dead ends: 84 [2018-01-24 11:51:34,868 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 11:51:34,871 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:51:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 11:51:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 11:51:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 11:51:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-01-24 11:51:34,898 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 11 [2018-01-24 11:51:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:34,898 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-01-24 11:51:34,898 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:51:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-01-24 11:51:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 11:51:34,899 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:34,899 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:34,899 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1993989714, now seen corresponding path program 1 times [2018-01-24 11:51:34,899 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:34,899 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:34,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:34,900 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:34,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:34,915 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:34,988 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:51:34,989 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 11:51:34,990 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 11:51:34,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 11:51:34,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:51:34,991 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 5 states. [2018-01-24 11:51:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:35,136 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-01-24 11:51:35,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:51:35,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-24 11:51:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:35,138 INFO L225 Difference]: With dead ends: 49 [2018-01-24 11:51:35,138 INFO L226 Difference]: Without dead ends: 48 [2018-01-24 11:51:35,139 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:51:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-24 11:51:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-24 11:51:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-24 11:51:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-01-24 11:51:35,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 11 [2018-01-24 11:51:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:35,144 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-01-24 11:51:35,144 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 11:51:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-01-24 11:51:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 11:51:35,145 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:35,145 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:35,145 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1188525484, now seen corresponding path program 1 times [2018-01-24 11:51:35,146 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:35,146 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:35,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,148 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:35,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:35,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:35,254 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:51:35,255 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 11:51:35,255 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:51:35,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:51:35,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:51:35,256 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 6 states. [2018-01-24 11:51:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:35,359 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-01-24 11:51:35,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:51:35,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-01-24 11:51:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:35,361 INFO L225 Difference]: With dead ends: 48 [2018-01-24 11:51:35,361 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 11:51:35,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:51:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 11:51:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-24 11:51:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 11:51:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-01-24 11:51:35,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 17 [2018-01-24 11:51:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:35,369 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-01-24 11:51:35,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:51:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-01-24 11:51:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 11:51:35,370 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:35,370 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:35,370 INFO L371 AbstractCegarLoop]: === Iteration 4 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1188525483, now seen corresponding path program 1 times [2018-01-24 11:51:35,371 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:35,371 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:35,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:35,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:35,391 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:35,542 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:51:35,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 11:51:35,543 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 11:51:35,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 11:51:35,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:51:35,544 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 7 states. [2018-01-24 11:51:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:35,676 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-01-24 11:51:35,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 11:51:35,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-01-24 11:51:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:35,677 INFO L225 Difference]: With dead ends: 80 [2018-01-24 11:51:35,677 INFO L226 Difference]: Without dead ends: 53 [2018-01-24 11:51:35,678 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:51:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-24 11:51:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2018-01-24 11:51:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-24 11:51:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-01-24 11:51:35,686 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 17 [2018-01-24 11:51:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:35,686 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-01-24 11:51:35,686 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 11:51:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-01-24 11:51:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-24 11:51:35,687 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:35,687 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:35,687 INFO L371 AbstractCegarLoop]: === Iteration 5 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2106816852, now seen corresponding path program 1 times [2018-01-24 11:51:35,688 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:35,688 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:35,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,689 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:35,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:35,707 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:35,880 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:35,880 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:35,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:35,922 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:35,954 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 11:51:35,955 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:35,963 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:51:35,963 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2018-01-24 11:51:35,990 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-01-24 11:51:35,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:35,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 11:51:35,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:21 [2018-01-24 11:51:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:36,132 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:36,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-01-24 11:51:36,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 11:51:36,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 11:51:36,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-01-24 11:51:36,134 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2018-01-24 11:51:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:36,495 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-01-24 11:51:36,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 11:51:36,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-01-24 11:51:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:36,497 INFO L225 Difference]: With dead ends: 90 [2018-01-24 11:51:36,497 INFO L226 Difference]: Without dead ends: 63 [2018-01-24 11:51:36,498 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:51:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-24 11:51:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2018-01-24 11:51:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-24 11:51:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-24 11:51:36,505 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 21 [2018-01-24 11:51:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:36,506 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-24 11:51:36,506 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 11:51:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-24 11:51:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 11:51:36,507 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:36,507 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:36,507 INFO L371 AbstractCegarLoop]: === Iteration 6 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -702775421, now seen corresponding path program 2 times [2018-01-24 11:51:36,508 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:36,508 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:36,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:36,509 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:36,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:36,527 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:36,714 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:36,714 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:36,723 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:36,740 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:36,745 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:36,746 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:36,749 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:36,754 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 11:51:36,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:36,763 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-01-24 11:51:36,763 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:36,768 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:51:36,768 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2018-01-24 11:51:36,802 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:51:36,803 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:51:36,805 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-24 11:51:36,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:36,815 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-01-24 11:51:36,815 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:36,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 11:51:36,824 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:25 [2018-01-24 11:51:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:37,032 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:37,032 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-24 11:51:37,032 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-24 11:51:37,032 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-24 11:51:37,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-01-24 11:51:37,033 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 17 states. [2018-01-24 11:51:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:37,589 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-01-24 11:51:37,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 11:51:37,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2018-01-24 11:51:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:37,591 INFO L225 Difference]: With dead ends: 104 [2018-01-24 11:51:37,591 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 11:51:37,592 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:51:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 11:51:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2018-01-24 11:51:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-24 11:51:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2018-01-24 11:51:37,601 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 25 [2018-01-24 11:51:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:37,602 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2018-01-24 11:51:37,602 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-24 11:51:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2018-01-24 11:51:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 11:51:37,603 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:37,603 INFO L322 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:37,603 INFO L371 AbstractCegarLoop]: === Iteration 7 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:37,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1827026138, now seen corresponding path program 3 times [2018-01-24 11:51:37,603 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:37,603 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:37,604 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:37,604 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:37,605 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:37,621 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:37,833 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:37,833 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:37,838 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:37,856 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:37,861 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:37,862 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:37,865 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:37,868 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-01-24 11:51:37,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,873 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 11:51:37,874 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,878 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:16 [2018-01-24 11:51:37,943 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:51:37,951 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-01-24 11:51:37,951 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,959 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:51:37,960 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:51:37,960 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-24 11:51:37,960 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:51:37,965 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2018-01-24 11:51:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-24 11:51:38,189 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:38,189 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2018-01-24 11:51:38,189 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-24 11:51:38,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-24 11:51:38,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:51:38,190 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 18 states. [2018-01-24 11:51:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:38,872 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2018-01-24 11:51:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 11:51:38,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2018-01-24 11:51:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:38,876 INFO L225 Difference]: With dead ends: 125 [2018-01-24 11:51:38,877 INFO L226 Difference]: Without dead ends: 90 [2018-01-24 11:51:38,878 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-01-24 11:51:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-24 11:51:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2018-01-24 11:51:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-24 11:51:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-01-24 11:51:38,888 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 29 [2018-01-24 11:51:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:38,888 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-01-24 11:51:38,888 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-24 11:51:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-01-24 11:51:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-24 11:51:38,889 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:38,890 INFO L322 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:38,890 INFO L371 AbstractCegarLoop]: === Iteration 8 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -645884181, now seen corresponding path program 1 times [2018-01-24 11:51:38,890 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:38,890 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:38,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:38,891 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:38,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:38,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:39,009 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:39,009 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:39,022 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:39,051 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:39,173 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:39,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-01-24 11:51:39,173 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 11:51:39,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 11:51:39,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:51:39,174 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 15 states. [2018-01-24 11:51:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:39,366 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2018-01-24 11:51:39,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 11:51:39,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-01-24 11:51:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:39,368 INFO L225 Difference]: With dead ends: 136 [2018-01-24 11:51:39,368 INFO L226 Difference]: Without dead ends: 102 [2018-01-24 11:51:39,369 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:51:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-24 11:51:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2018-01-24 11:51:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-24 11:51:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2018-01-24 11:51:39,383 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 40 [2018-01-24 11:51:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:39,384 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2018-01-24 11:51:39,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-24 11:51:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2018-01-24 11:51:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-24 11:51:39,385 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:39,385 INFO L322 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:39,386 INFO L371 AbstractCegarLoop]: === Iteration 9 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2113361740, now seen corresponding path program 2 times [2018-01-24 11:51:39,386 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:39,386 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:39,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:39,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:39,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:39,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:39,531 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:39,531 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:39,543 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:39,563 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:39,565 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:39,568 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:39,572 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 11:51:39,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:39,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 11:51:39,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-24 11:51:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-24 11:51:39,727 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-24 11:51:39,727 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2018-01-24 11:51:39,727 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 11:51:39,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 11:51:39,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:51:39,728 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 15 states. [2018-01-24 11:51:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:40,291 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2018-01-24 11:51:40,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-24 11:51:40,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2018-01-24 11:51:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:40,292 INFO L225 Difference]: With dead ends: 140 [2018-01-24 11:51:40,292 INFO L226 Difference]: Without dead ends: 94 [2018-01-24 11:51:40,293 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:51:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-01-24 11:51:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2018-01-24 11:51:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 11:51:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-01-24 11:51:40,303 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 44 [2018-01-24 11:51:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:40,303 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-01-24 11:51:40,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-24 11:51:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-01-24 11:51:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 11:51:40,304 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:40,304 INFO L322 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:40,305 INFO L371 AbstractCegarLoop]: === Iteration 10 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1590645252, now seen corresponding path program 1 times [2018-01-24 11:51:40,305 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:40,305 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:40,305 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,305 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:40,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:40,318 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-24 11:51:40,356 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:51:40,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 11:51:40,356 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:51:40,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:51:40,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:51:40,357 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 4 states. [2018-01-24 11:51:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:40,392 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2018-01-24 11:51:40,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:51:40,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-01-24 11:51:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:40,394 INFO L225 Difference]: With dead ends: 77 [2018-01-24 11:51:40,394 INFO L226 Difference]: Without dead ends: 75 [2018-01-24 11:51:40,394 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:51:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-24 11:51:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-24 11:51:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-24 11:51:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-01-24 11:51:40,408 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 48 [2018-01-24 11:51:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:40,408 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-01-24 11:51:40,408 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:51:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-01-24 11:51:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-24 11:51:40,410 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:40,411 INFO L322 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:40,411 INFO L371 AbstractCegarLoop]: === Iteration 11 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:40,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1106929516, now seen corresponding path program 1 times [2018-01-24 11:51:40,411 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:40,411 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:40,412 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,412 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:40,412 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:40,431 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-24 11:51:40,582 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:40,582 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:40,587 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:40,615 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-24 11:51:40,696 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:40,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-01-24 11:51:40,697 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-24 11:51:40,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-24 11:51:40,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2018-01-24 11:51:40,698 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-01-24 11:51:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:40,799 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2018-01-24 11:51:40,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 11:51:40,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-01-24 11:51:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:40,800 INFO L225 Difference]: With dead ends: 122 [2018-01-24 11:51:40,800 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 11:51:40,801 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:51:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 11:51:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-01-24 11:51:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-24 11:51:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-01-24 11:51:40,813 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 74 [2018-01-24 11:51:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:40,813 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-01-24 11:51:40,813 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-24 11:51:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-01-24 11:51:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-24 11:51:40,815 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:40,815 INFO L322 BasicCegarLoop]: trace histogram [9, 9, 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] [2018-01-24 11:51:40,815 INFO L371 AbstractCegarLoop]: === Iteration 12 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2069780427, now seen corresponding path program 2 times [2018-01-24 11:51:40,815 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:40,815 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:40,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,816 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:40,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:40,833 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-01-24 11:51:41,205 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:41,205 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:41,215 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:41,233 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:41,254 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:41,267 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:41,271 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-01-24 11:51:41,396 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:41,396 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-01-24 11:51:41,397 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-24 11:51:41,397 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-24 11:51:41,397 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2018-01-24 11:51:41,397 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 22 states. [2018-01-24 11:51:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:41,530 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2018-01-24 11:51:41,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 11:51:41,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2018-01-24 11:51:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:41,531 INFO L225 Difference]: With dead ends: 138 [2018-01-24 11:51:41,531 INFO L226 Difference]: Without dead ends: 99 [2018-01-24 11:51:41,532 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2018-01-24 11:51:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-24 11:51:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-01-24 11:51:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-24 11:51:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-01-24 11:51:41,548 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 86 [2018-01-24 11:51:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:41,549 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-01-24 11:51:41,549 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-24 11:51:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-01-24 11:51:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-01-24 11:51:41,550 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:41,551 INFO L322 BasicCegarLoop]: trace histogram [10, 10, 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] [2018-01-24 11:51:41,551 INFO L371 AbstractCegarLoop]: === Iteration 13 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:41,551 INFO L82 PathProgramCache]: Analyzing trace with hash 67534827, now seen corresponding path program 3 times [2018-01-24 11:51:41,551 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:41,551 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:41,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:41,552 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:41,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:41,572 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-24 11:51:41,752 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:41,752 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:41,759 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:41,774 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,778 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,781 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,786 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,807 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,833 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,851 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:41,889 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:41,892 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-24 11:51:41,935 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:41,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2018-01-24 11:51:41,936 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 11:51:41,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 11:51:41,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:51:41,936 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 15 states. [2018-01-24 11:51:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:42,148 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-01-24 11:51:42,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 11:51:42,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2018-01-24 11:51:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:42,150 INFO L225 Difference]: With dead ends: 150 [2018-01-24 11:51:42,150 INFO L226 Difference]: Without dead ends: 107 [2018-01-24 11:51:42,150 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2018-01-24 11:51:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-01-24 11:51:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-01-24 11:51:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-24 11:51:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-01-24 11:51:42,162 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 94 [2018-01-24 11:51:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:42,162 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-01-24 11:51:42,162 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-24 11:51:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-01-24 11:51:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-24 11:51:42,163 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:42,163 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 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] [2018-01-24 11:51:42,164 INFO L371 AbstractCegarLoop]: === Iteration 14 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash 306183947, now seen corresponding path program 4 times [2018-01-24 11:51:42,164 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:42,164 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:42,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:42,165 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:42,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:42,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-01-24 11:51:42,388 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:42,388 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:42,398 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:51:42,424 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:42,428 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:42,431 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 11:51:42,431 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:51:42,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:51:42,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:7 [2018-01-24 11:51:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 200 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:42,845 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:42,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27] total 40 [2018-01-24 11:51:42,846 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-24 11:51:42,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-24 11:51:42,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2018-01-24 11:51:42,846 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 40 states. [2018-01-24 11:51:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:43,201 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2018-01-24 11:51:43,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-24 11:51:43,201 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2018-01-24 11:51:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:43,202 INFO L225 Difference]: With dead ends: 162 [2018-01-24 11:51:43,202 INFO L226 Difference]: Without dead ends: 115 [2018-01-24 11:51:43,203 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2018-01-24 11:51:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-24 11:51:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-01-24 11:51:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-01-24 11:51:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-01-24 11:51:43,213 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 102 [2018-01-24 11:51:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:43,214 INFO L432 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-01-24 11:51:43,214 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-24 11:51:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-01-24 11:51:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-01-24 11:51:43,215 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:43,215 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 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] [2018-01-24 11:51:43,215 INFO L371 AbstractCegarLoop]: === Iteration 15 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2043652821, now seen corresponding path program 5 times [2018-01-24 11:51:43,215 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:43,215 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:43,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:43,216 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:43,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:43,236 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-24 11:51:43,548 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:43,548 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:43,554 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:51:43,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,567 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,570 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,582 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,593 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,611 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,702 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:43,756 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:44,017 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:44,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:44,386 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:44,388 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:44,393 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-24 11:51:44,432 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:44,432 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-01-24 11:51:44,432 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-24 11:51:44,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-24 11:51:44,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-01-24 11:51:44,433 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 17 states. [2018-01-24 11:51:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:44,656 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2018-01-24 11:51:44,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 11:51:44,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2018-01-24 11:51:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:44,658 INFO L225 Difference]: With dead ends: 174 [2018-01-24 11:51:44,658 INFO L226 Difference]: Without dead ends: 123 [2018-01-24 11:51:44,658 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2018-01-24 11:51:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-24 11:51:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-01-24 11:51:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 11:51:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-01-24 11:51:44,671 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 110 [2018-01-24 11:51:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:44,672 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-01-24 11:51:44,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-24 11:51:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-01-24 11:51:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-01-24 11:51:44,673 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:44,673 INFO L322 BasicCegarLoop]: trace histogram [13, 13, 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] [2018-01-24 11:51:44,673 INFO L371 AbstractCegarLoop]: === Iteration 16 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -130219445, now seen corresponding path program 6 times [2018-01-24 11:51:44,673 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:44,673 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:44,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:44,674 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:44,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:44,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-24 11:51:44,916 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:44,916 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:44,921 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:51:44,935 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:44,938 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:44,941 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:44,946 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:44,954 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:44,968 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,003 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,037 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,136 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,308 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,381 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,650 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,798 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:45,799 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:45,803 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-24 11:51:45,850 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:45,850 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-01-24 11:51:45,851 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-24 11:51:45,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-24 11:51:45,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:51:45,851 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 18 states. [2018-01-24 11:51:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:46,045 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2018-01-24 11:51:46,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 11:51:46,046 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 118 [2018-01-24 11:51:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:46,046 INFO L225 Difference]: With dead ends: 186 [2018-01-24 11:51:46,046 INFO L226 Difference]: Without dead ends: 131 [2018-01-24 11:51:46,047 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2018-01-24 11:51:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-01-24 11:51:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-01-24 11:51:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-24 11:51:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-01-24 11:51:46,059 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 118 [2018-01-24 11:51:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:46,059 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-01-24 11:51:46,059 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-24 11:51:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-01-24 11:51:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-01-24 11:51:46,060 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:46,060 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 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] [2018-01-24 11:51:46,060 INFO L371 AbstractCegarLoop]: === Iteration 17 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1727297941, now seen corresponding path program 7 times [2018-01-24 11:51:46,060 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:46,060 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:46,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:46,061 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:46,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:46,078 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-01-24 11:51:46,228 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:46,228 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:46,239 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:46,273 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-01-24 11:51:46,446 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:46,446 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2018-01-24 11:51:46,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-24 11:51:46,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-24 11:51:46,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=631, Unknown=0, NotChecked=0, Total=992 [2018-01-24 11:51:46,447 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 32 states. [2018-01-24 11:51:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:46,618 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2018-01-24 11:51:46,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-24 11:51:46,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2018-01-24 11:51:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:46,619 INFO L225 Difference]: With dead ends: 198 [2018-01-24 11:51:46,619 INFO L226 Difference]: Without dead ends: 139 [2018-01-24 11:51:46,619 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=664, Unknown=0, NotChecked=0, Total=1056 [2018-01-24 11:51:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-24 11:51:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-01-24 11:51:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 11:51:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-01-24 11:51:46,632 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 126 [2018-01-24 11:51:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:46,633 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-01-24 11:51:46,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-24 11:51:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-01-24 11:51:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-01-24 11:51:46,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:46,633 INFO L322 BasicCegarLoop]: trace histogram [15, 15, 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] [2018-01-24 11:51:46,634 INFO L371 AbstractCegarLoop]: === Iteration 18 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 293691787, now seen corresponding path program 8 times [2018-01-24 11:51:46,634 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:46,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:46,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:46,634 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:46,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:46,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-24 11:51:46,884 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:46,884 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:46,891 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:46,909 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:46,936 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:46,939 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:46,943 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-24 11:51:47,160 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:47,160 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2018-01-24 11:51:47,161 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-24 11:51:47,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-24 11:51:47,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=713, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:51:47,162 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 34 states. [2018-01-24 11:51:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:47,401 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-01-24 11:51:47,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-24 11:51:47,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2018-01-24 11:51:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:47,402 INFO L225 Difference]: With dead ends: 210 [2018-01-24 11:51:47,402 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 11:51:47,403 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=748, Unknown=0, NotChecked=0, Total=1190 [2018-01-24 11:51:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 11:51:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-01-24 11:51:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-24 11:51:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-01-24 11:51:47,417 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 134 [2018-01-24 11:51:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:47,417 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-01-24 11:51:47,417 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-24 11:51:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-01-24 11:51:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-01-24 11:51:47,418 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:47,418 INFO L322 BasicCegarLoop]: trace histogram [16, 16, 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] [2018-01-24 11:51:47,418 INFO L371 AbstractCegarLoop]: === Iteration 19 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1657017259, now seen corresponding path program 9 times [2018-01-24 11:51:47,418 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:47,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:47,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:47,419 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:47,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:47,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-01-24 11:51:47,865 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:47,865 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:47,870 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:47,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,903 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,913 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,922 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,932 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:47,950 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,010 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,027 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,155 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,179 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,220 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,264 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,338 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:48,340 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:48,345 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 58 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-24 11:51:48,639 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:48,639 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2018-01-24 11:51:48,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-24 11:51:48,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-24 11:51:48,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1112, Unknown=0, NotChecked=0, Total=1640 [2018-01-24 11:51:48,640 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 41 states. [2018-01-24 11:51:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:48,884 INFO L93 Difference]: Finished difference Result 228 states and 233 transitions. [2018-01-24 11:51:48,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-24 11:51:48,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 142 [2018-01-24 11:51:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:48,885 INFO L225 Difference]: With dead ends: 228 [2018-01-24 11:51:48,885 INFO L226 Difference]: Without dead ends: 161 [2018-01-24 11:51:48,886 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1234, Unknown=0, NotChecked=0, Total=1806 [2018-01-24 11:51:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-24 11:51:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2018-01-24 11:51:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 11:51:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-01-24 11:51:48,907 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 142 [2018-01-24 11:51:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:48,907 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-01-24 11:51:48,907 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-24 11:51:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-01-24 11:51:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-01-24 11:51:48,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:48,908 INFO L322 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:48,909 INFO L371 AbstractCegarLoop]: === Iteration 20 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1444851412, now seen corresponding path program 10 times [2018-01-24 11:51:48,909 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:48,909 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:48,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:48,910 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:48,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:48,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-24 11:51:49,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:49,266 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:49,271 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:51:51,619 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:51,627 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-24 11:51:51,988 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:51,988 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-01-24 11:51:51,989 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-24 11:51:51,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-24 11:51:51,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=989, Unknown=0, NotChecked=0, Total=1560 [2018-01-24 11:51:51,990 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-01-24 11:51:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:52,388 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2018-01-24 11:51:52,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-24 11:51:52,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-01-24 11:51:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:52,390 INFO L225 Difference]: With dead ends: 242 [2018-01-24 11:51:52,390 INFO L226 Difference]: Without dead ends: 171 [2018-01-24 11:51:52,391 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2018-01-24 11:51:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-01-24 11:51:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-01-24 11:51:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-01-24 11:51:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-01-24 11:51:52,413 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 154 [2018-01-24 11:51:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:52,413 INFO L432 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-01-24 11:51:52,413 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-24 11:51:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-01-24 11:51:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-01-24 11:51:52,414 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:52,414 INFO L322 BasicCegarLoop]: trace histogram [19, 19, 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] [2018-01-24 11:51:52,414 INFO L371 AbstractCegarLoop]: === Iteration 21 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:51:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash 43004939, now seen corresponding path program 11 times [2018-01-24 11:51:52,415 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:52,415 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:52,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:52,415 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:52,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:52,440 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-24 11:51:53,020 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:53,020 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:51:53,026 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:51:53,042 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,056 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,061 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,075 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,097 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,136 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,568 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:53,694 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:54,457 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:55,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:57,315 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:00,691 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:07,983 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:11,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:13,261 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:15,421 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:27,531 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:52:27,557 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:52:27,593 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:52:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-24 11:52:27,680 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:52:27,680 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2018-01-24 11:52:27,680 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-24 11:52:27,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-24 11:52:27,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:52:27,681 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 24 states. [2018-01-24 11:52:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:52:28,169 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2018-01-24 11:52:28,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-24 11:52:28,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 166 [2018-01-24 11:52:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:52:28,170 INFO L225 Difference]: With dead ends: 258 [2018-01-24 11:52:28,170 INFO L226 Difference]: Without dead ends: 179 [2018-01-24 11:52:28,171 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2018-01-24 11:52:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-01-24 11:52:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-01-24 11:52:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-01-24 11:52:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-01-24 11:52:28,186 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 166 [2018-01-24 11:52:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:52:28,187 INFO L432 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-01-24 11:52:28,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-24 11:52:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-01-24 11:52:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-01-24 11:52:28,187 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:52:28,188 INFO L322 BasicCegarLoop]: trace histogram [20, 20, 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] [2018-01-24 11:52:28,188 INFO L371 AbstractCegarLoop]: === Iteration 22 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-24 11:52:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1199391275, now seen corresponding path program 12 times [2018-01-24 11:52:28,188 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:52:28,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:52:28,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:52:28,189 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:52:28,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:52:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:52:28,217 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:52:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-01-24 11:52:28,636 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:52:28,636 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-24 11:52:28,641 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:52:28,657 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,667 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,683 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,706 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,753 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,795 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:28,984 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:29,449 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:30,399 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:31,088 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:32,893 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:52:36,431 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-24 11:52:40,023 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown