java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 22:42:09,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 22:42:10,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 22:42:10,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-01 22:42:10,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 22:42:10,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 22:42:10,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 22:42:10,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 22:42:10,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 22:42:10,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 22:42:10,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 22:42:10,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 22:42:10,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 22:42:10,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 22:42:10,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 22:42:10,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 22:42:10,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 22:42:10,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 22:42:10,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 22:42:10,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 22:42:10,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-01 22:42:10,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 22:42:10,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 22:42:10,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 22:42:10,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 22:42:10,090 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 22:42:10,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 22:42:10,091 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 22:42:10,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 22:42:10,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 22:42:10,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 22:42:10,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 22:42:10,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 22:42:10,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 22:42:10,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 22:42:10,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 22:42:10,093 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 22:42:10,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 22:42:10,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 22:42:10,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 22:42:10,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 22:42:10,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 22:42:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:42:10,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 22:42:10,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 22:42:10,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 22:42:10,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 22:42:10,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 22:42:10,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 22:42:10,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 22:42:10,127 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 22:42:10,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 22:42:10,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 22:42:10,156 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 22:42:10,157 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 22:42:10,160 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-10-01 22:42:10,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a254de4e1/6c5a2d65954d448fa2cb29858bb549af/FLAGad5988df9 [2019-10-01 22:42:10,681 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 22:42:10,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-10-01 22:42:10,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a254de4e1/6c5a2d65954d448fa2cb29858bb549af/FLAGad5988df9 [2019-10-01 22:42:11,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a254de4e1/6c5a2d65954d448fa2cb29858bb549af [2019-10-01 22:42:11,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 22:42:11,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 22:42:11,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 22:42:11,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 22:42:11,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 22:42:11,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be43138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11, skipping insertion in model container [2019-10-01 22:42:11,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,093 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 22:42:11,107 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 22:42:11,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:42:11,290 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 22:42:11,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:42:11,330 INFO L192 MainTranslator]: Completed translation [2019-10-01 22:42:11,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11 WrapperNode [2019-10-01 22:42:11,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 22:42:11,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 22:42:11,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 22:42:11,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 22:42:11,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... [2019-10-01 22:42:11,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 22:42:11,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 22:42:11,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 22:42:11,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 22:42:11,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:42:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 22:42:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 22:42:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 22:42:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 22:42:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 22:42:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 22:42:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 22:42:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 22:42:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 22:42:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 22:42:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 22:42:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 22:42:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 22:42:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 22:42:11,838 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 22:42:11,839 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-01 22:42:11,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:42:11 BoogieIcfgContainer [2019-10-01 22:42:11,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 22:42:11,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 22:42:11,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 22:42:11,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 22:42:11,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 10:42:11" (1/3) ... [2019-10-01 22:42:11,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b967130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:42:11, skipping insertion in model container [2019-10-01 22:42:11,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:42:11" (2/3) ... [2019-10-01 22:42:11,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b967130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:42:11, skipping insertion in model container [2019-10-01 22:42:11,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:42:11" (3/3) ... [2019-10-01 22:42:11,862 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2019-10-01 22:42:11,888 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 22:42:11,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 22:42:11,933 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 22:42:11,961 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 22:42:11,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 22:42:11,962 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 22:42:11,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 22:42:11,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 22:42:11,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 22:42:11,963 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 22:42:11,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 22:42:11,963 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 22:42:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-01 22:42:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 22:42:11,990 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:11,992 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:11,994 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2019-10-01 22:42:12,005 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:12,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:12,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:42:12,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:42:12,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 22:42:12,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 22:42:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 22:42:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:42:12,172 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-01 22:42:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:12,197 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-10-01 22:42:12,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 22:42:12,199 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-01 22:42:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:12,212 INFO L225 Difference]: With dead ends: 52 [2019-10-01 22:42:12,212 INFO L226 Difference]: Without dead ends: 25 [2019-10-01 22:42:12,220 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:42:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-01 22:42:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-01 22:42:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-01 22:42:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-01 22:42:12,276 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-01 22:42:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:12,277 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-01 22:42:12,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 22:42:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-01 22:42:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 22:42:12,280 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:12,280 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:12,280 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2019-10-01 22:42:12,282 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:12,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:12,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:42:12,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:42:12,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:42:12,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:42:12,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:42:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:42:12,367 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2019-10-01 22:42:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:12,388 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-01 22:42:12,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:42:12,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-01 22:42:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:12,390 INFO L225 Difference]: With dead ends: 44 [2019-10-01 22:42:12,390 INFO L226 Difference]: Without dead ends: 27 [2019-10-01 22:42:12,391 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:42:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-01 22:42:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-01 22:42:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-01 22:42:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-01 22:42:12,398 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2019-10-01 22:42:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:12,398 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-01 22:42:12,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:42:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-01 22:42:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-01 22:42:12,399 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:12,400 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:12,400 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:12,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1114616120, now seen corresponding path program 1 times [2019-10-01 22:42:12,401 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:12,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:12,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:42:12,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:42:12,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:42:12,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:42:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:42:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:42:12,462 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 3 states. [2019-10-01 22:42:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:12,505 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-01 22:42:12,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:42:12,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-01 22:42:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:12,507 INFO L225 Difference]: With dead ends: 44 [2019-10-01 22:42:12,507 INFO L226 Difference]: Without dead ends: 30 [2019-10-01 22:42:12,508 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:42:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-01 22:42:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-01 22:42:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-01 22:42:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-01 22:42:12,515 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2019-10-01 22:42:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:12,515 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-01 22:42:12,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:42:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-01 22:42:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 22:42:12,517 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:12,517 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:12,517 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2019-10-01 22:42:12,518 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:12,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:12,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-01 22:42:12,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:12,605 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:12,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:42:12,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-01 22:42:12,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:12,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-10-01 22:42:12,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 22:42:12,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 22:42:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:42:12,725 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2019-10-01 22:42:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:12,821 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-01 22:42:12,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 22:42:12,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-01 22:42:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:12,823 INFO L225 Difference]: With dead ends: 56 [2019-10-01 22:42:12,823 INFO L226 Difference]: Without dead ends: 37 [2019-10-01 22:42:12,824 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:42:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-01 22:42:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-01 22:42:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 22:42:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-01 22:42:12,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2019-10-01 22:42:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:12,832 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-01 22:42:12,832 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 22:42:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-01 22:42:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-01 22:42:12,833 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:12,833 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:12,834 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1714175694, now seen corresponding path program 2 times [2019-10-01 22:42:12,834 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:12,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:12,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:12,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 22:42:12,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:12,921 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:12,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:12,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:42:12,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:12,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:42:13,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 22:42:13,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:13,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-01 22:42:13,058 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:42:13,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:42:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:42:13,060 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2019-10-01 22:42:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:13,175 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-01 22:42:13,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 22:42:13,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-10-01 22:42:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:13,177 INFO L225 Difference]: With dead ends: 66 [2019-10-01 22:42:13,177 INFO L226 Difference]: Without dead ends: 43 [2019-10-01 22:42:13,178 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:42:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-01 22:42:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-01 22:42:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-01 22:42:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-01 22:42:13,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 29 [2019-10-01 22:42:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:13,185 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-01 22:42:13,186 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:42:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-01 22:42:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-01 22:42:13,187 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:13,187 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:13,187 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 561048040, now seen corresponding path program 3 times [2019-10-01 22:42:13,188 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:13,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:13,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:13,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-01 22:42:13,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:13,277 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:13,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:42:13,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-01 22:42:13,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:13,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 22:42:13,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-01 22:42:13,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:13,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-01 22:42:13,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:42:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:42:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:42:13,406 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2019-10-01 22:42:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:13,511 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2019-10-01 22:42:13,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:42:13,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-01 22:42:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:13,514 INFO L225 Difference]: With dead ends: 76 [2019-10-01 22:42:13,514 INFO L226 Difference]: Without dead ends: 49 [2019-10-01 22:42:13,515 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:42:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-01 22:42:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-01 22:42:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-01 22:42:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2019-10-01 22:42:13,532 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2019-10-01 22:42:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:13,532 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2019-10-01 22:42:13,535 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:42:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2019-10-01 22:42:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-01 22:42:13,538 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:13,539 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:13,539 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:13,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2115443074, now seen corresponding path program 4 times [2019-10-01 22:42:13,539 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:13,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:13,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:13,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-01 22:42:13,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:13,624 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:13,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:13,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:42:13,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:13,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:42:13,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-01 22:42:13,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:13,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-01 22:42:13,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 22:42:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 22:42:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:42:13,753 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2019-10-01 22:42:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:13,885 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-10-01 22:42:13,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 22:42:13,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-10-01 22:42:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:13,887 INFO L225 Difference]: With dead ends: 86 [2019-10-01 22:42:13,887 INFO L226 Difference]: Without dead ends: 55 [2019-10-01 22:42:13,888 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:42:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-01 22:42:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-01 22:42:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-01 22:42:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-01 22:42:13,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 41 [2019-10-01 22:42:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:13,904 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-01 22:42:13,904 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 22:42:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-01 22:42:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-01 22:42:13,911 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:13,911 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:13,912 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -249467492, now seen corresponding path program 5 times [2019-10-01 22:42:13,912 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:13,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:13,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:13,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-01 22:42:14,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:14,068 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:14,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:42:14,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-01 22:42:14,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:14,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:42:14,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:42:14,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:14,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 22:42:14,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 22:42:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 22:42:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:42:14,631 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 9 states. [2019-10-01 22:42:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:14,713 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2019-10-01 22:42:14,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 22:42:14,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-01 22:42:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:14,715 INFO L225 Difference]: With dead ends: 81 [2019-10-01 22:42:14,715 INFO L226 Difference]: Without dead ends: 58 [2019-10-01 22:42:14,716 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:42:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-01 22:42:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2019-10-01 22:42:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-01 22:42:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2019-10-01 22:42:14,724 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 47 [2019-10-01 22:42:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:14,724 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2019-10-01 22:42:14,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 22:42:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2019-10-01 22:42:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-01 22:42:14,726 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:14,726 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:14,726 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -619179368, now seen corresponding path program 6 times [2019-10-01 22:42:14,727 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:14,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:14,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:14,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-01 22:42:14,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:14,884 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:14,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:15,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 22:42:15,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:15,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 22:42:15,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-01 22:42:15,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:15,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 22:42:15,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:42:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:42:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:42:15,077 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 10 states. [2019-10-01 22:42:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:15,158 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2019-10-01 22:42:15,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 22:42:15,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-10-01 22:42:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:15,160 INFO L225 Difference]: With dead ends: 87 [2019-10-01 22:42:15,160 INFO L226 Difference]: Without dead ends: 62 [2019-10-01 22:42:15,161 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:42:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-01 22:42:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-01 22:42:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-01 22:42:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-10-01 22:42:15,177 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2019-10-01 22:42:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:15,177 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-10-01 22:42:15,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:42:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-10-01 22:42:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-01 22:42:15,178 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:15,180 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:15,180 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2123942292, now seen corresponding path program 7 times [2019-10-01 22:42:15,181 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:15,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:15,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-01 22:42:15,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:15,321 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:15,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:15,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:42:15,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-01 22:42:15,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:15,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-10-01 22:42:15,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:42:15,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:42:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:42:15,469 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 16 states. [2019-10-01 22:42:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:15,621 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-10-01 22:42:15,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 22:42:15,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2019-10-01 22:42:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:15,624 INFO L225 Difference]: With dead ends: 112 [2019-10-01 22:42:15,624 INFO L226 Difference]: Without dead ends: 69 [2019-10-01 22:42:15,625 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:42:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-01 22:42:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-01 22:42:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-01 22:42:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2019-10-01 22:42:15,641 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2019-10-01 22:42:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:15,641 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2019-10-01 22:42:15,641 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:42:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2019-10-01 22:42:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-01 22:42:15,643 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:15,643 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:15,644 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1961527342, now seen corresponding path program 8 times [2019-10-01 22:42:15,644 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:15,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:15,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:15,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:15,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:42:15,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:15,799 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:15,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:42:15,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:42:15,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:15,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 22:42:15,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-01 22:42:15,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:15,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-01 22:42:15,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 22:42:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 22:42:15,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:42:15,983 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 18 states. [2019-10-01 22:42:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:16,119 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-10-01 22:42:16,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 22:42:16,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-10-01 22:42:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:16,121 INFO L225 Difference]: With dead ends: 122 [2019-10-01 22:42:16,122 INFO L226 Difference]: Without dead ends: 75 [2019-10-01 22:42:16,122 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:42:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-01 22:42:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-10-01 22:42:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-01 22:42:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-10-01 22:42:16,137 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 61 [2019-10-01 22:42:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:16,142 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-10-01 22:42:16,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 22:42:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-10-01 22:42:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-01 22:42:16,143 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:16,143 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:16,144 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash 752429896, now seen corresponding path program 9 times [2019-10-01 22:42:16,145 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:16,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:16,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:16,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:16,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:16,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:16,273 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:16,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:16,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-01 22:42:16,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:16,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:42:16,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:16,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:16,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 22:42:16,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 22:42:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 22:42:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:42:16,888 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 11 states. [2019-10-01 22:42:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:16,921 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2019-10-01 22:42:16,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:42:16,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-10-01 22:42:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:16,922 INFO L225 Difference]: With dead ends: 126 [2019-10-01 22:42:16,922 INFO L226 Difference]: Without dead ends: 75 [2019-10-01 22:42:16,923 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:42:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-01 22:42:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-01 22:42:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-01 22:42:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-10-01 22:42:16,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2019-10-01 22:42:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:16,929 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-10-01 22:42:16,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 22:42:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-10-01 22:42:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-01 22:42:16,930 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:16,930 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:16,931 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -965958938, now seen corresponding path program 10 times [2019-10-01 22:42:16,934 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:16,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:16,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:16,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:16,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:17,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:17,027 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:17,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:42:17,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:17,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 22:42:17,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Stream closed [2019-10-01 22:42:17,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:17,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-01 22:42:17,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 22:42:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 22:42:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:42:17,142 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 12 states. [2019-10-01 22:42:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:17,181 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2019-10-01 22:42:17,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 22:42:17,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2019-10-01 22:42:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:17,182 INFO L225 Difference]: With dead ends: 128 [2019-10-01 22:42:17,182 INFO L226 Difference]: Without dead ends: 77 [2019-10-01 22:42:17,188 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:42:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-01 22:42:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-10-01 22:42:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 22:42:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2019-10-01 22:42:17,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2019-10-01 22:42:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:17,202 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2019-10-01 22:42:17,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 22:42:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2019-10-01 22:42:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 22:42:17,203 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:17,203 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:17,205 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1224780548, now seen corresponding path program 11 times [2019-10-01 22:42:17,206 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:17,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:17,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:17,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:17,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:17,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:17,388 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:17,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:42:29,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-01 22:42:29,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:29,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 22:42:29,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:29,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:29,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-01 22:42:29,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 22:42:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 22:42:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:42:29,507 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 13 states. [2019-10-01 22:42:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:29,550 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2019-10-01 22:42:29,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 22:42:29,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-01 22:42:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:29,552 INFO L225 Difference]: With dead ends: 130 [2019-10-01 22:42:29,552 INFO L226 Difference]: Without dead ends: 79 [2019-10-01 22:42:29,553 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:42:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-01 22:42:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-10-01 22:42:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-01 22:42:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-10-01 22:42:29,558 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2019-10-01 22:42:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:29,558 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-10-01 22:42:29,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 22:42:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-10-01 22:42:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-01 22:42:29,559 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:29,559 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:29,560 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1991451554, now seen corresponding path program 12 times [2019-10-01 22:42:29,560 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:29,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:29,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:29,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:29,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:29,690 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:29,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:42:31,847 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-01 22:42:31,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:31,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:42:31,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:31,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:31,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-01 22:42:31,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 22:42:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 22:42:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:42:31,882 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 14 states. [2019-10-01 22:42:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:31,933 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2019-10-01 22:42:31,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 22:42:31,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2019-10-01 22:42:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:31,937 INFO L225 Difference]: With dead ends: 132 [2019-10-01 22:42:31,937 INFO L226 Difference]: Without dead ends: 81 [2019-10-01 22:42:31,938 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:42:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-01 22:42:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-10-01 22:42:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-01 22:42:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-10-01 22:42:31,942 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2019-10-01 22:42:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:31,943 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-10-01 22:42:31,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 22:42:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-10-01 22:42:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-01 22:42:31,944 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:31,944 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:31,944 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash 27913408, now seen corresponding path program 13 times [2019-10-01 22:42:31,945 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:31,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:31,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:31,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:31,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-10-01 22:42:32,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:32,053 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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) [2019-10-01 22:42:32,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:32,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:42:32,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-01 22:42:32,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:32,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-10-01 22:42:32,313 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 22:42:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 22:42:32,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:42:32,314 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 24 states. [2019-10-01 22:42:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:32,506 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-10-01 22:42:32,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 22:42:32,507 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2019-10-01 22:42:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:32,508 INFO L225 Difference]: With dead ends: 140 [2019-10-01 22:42:32,509 INFO L226 Difference]: Without dead ends: 89 [2019-10-01 22:42:32,510 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:42:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-01 22:42:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-10-01 22:42:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 22:42:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2019-10-01 22:42:32,514 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2019-10-01 22:42:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:32,514 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2019-10-01 22:42:32,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 22:42:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2019-10-01 22:42:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 22:42:32,515 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:32,516 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:32,516 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash -557376934, now seen corresponding path program 14 times [2019-10-01 22:42:32,516 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:32,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:32,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:32,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:42:32,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-01 22:42:32,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:32,650 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:32,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:42:32,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:42:32,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:32,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:42:32,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-01 22:42:32,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:32,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-10-01 22:42:32,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:42:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:42:32,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:42:32,754 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 16 states. [2019-10-01 22:42:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:32,815 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2019-10-01 22:42:32,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-01 22:42:32,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-10-01 22:42:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:32,816 INFO L225 Difference]: With dead ends: 144 [2019-10-01 22:42:32,816 INFO L226 Difference]: Without dead ends: 89 [2019-10-01 22:42:32,817 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:42:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-01 22:42:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-01 22:42:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-01 22:42:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2019-10-01 22:42:32,822 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2019-10-01 22:42:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:32,822 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2019-10-01 22:42:32,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:42:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2019-10-01 22:42:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-01 22:42:32,823 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:32,823 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:32,824 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 787080568, now seen corresponding path program 15 times [2019-10-01 22:42:32,824 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:32,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:32,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:32,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:32,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-01 22:42:33,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:33,043 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:33,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:42:37,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-01 22:42:37,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:37,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 22:42:37,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 44 proven. 100 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:42:37,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:37,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-10-01 22:42:37,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-01 22:42:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-01 22:42:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-10-01 22:42:37,340 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 31 states. [2019-10-01 22:42:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:37,808 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-10-01 22:42:37,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 22:42:37,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2019-10-01 22:42:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:37,809 INFO L225 Difference]: With dead ends: 155 [2019-10-01 22:42:37,809 INFO L226 Difference]: Without dead ends: 100 [2019-10-01 22:42:37,810 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2019-10-01 22:42:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-01 22:42:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-01 22:42:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-01 22:42:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2019-10-01 22:42:37,816 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 83 [2019-10-01 22:42:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:37,817 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2019-10-01 22:42:37,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-01 22:42:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2019-10-01 22:42:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-01 22:42:37,818 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:37,818 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:37,818 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 986321196, now seen corresponding path program 16 times [2019-10-01 22:42:37,819 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:37,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:37,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:37,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:37,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-01 22:42:38,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:38,108 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:38,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:42:38,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:42:38,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:38,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 22:42:38,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-01 22:42:38,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:38,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-01 22:42:38,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 22:42:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 22:42:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:42:38,280 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 19 states. [2019-10-01 22:42:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:38,349 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2019-10-01 22:42:38,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 22:42:38,352 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2019-10-01 22:42:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:38,353 INFO L225 Difference]: With dead ends: 166 [2019-10-01 22:42:38,353 INFO L226 Difference]: Without dead ends: 103 [2019-10-01 22:42:38,354 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:42:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-01 22:42:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-10-01 22:42:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-01 22:42:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2019-10-01 22:42:38,359 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2019-10-01 22:42:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:38,359 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2019-10-01 22:42:38,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 22:42:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2019-10-01 22:42:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-01 22:42:38,360 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:38,360 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:38,360 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash 744755146, now seen corresponding path program 17 times [2019-10-01 22:42:38,361 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:38,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:38,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:38,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:38,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-01 22:42:38,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:38,611 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-10-01 22:42:38,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:43:45,020 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-01 22:43:45,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:43:45,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:43:45,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:43:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-01 22:43:45,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:43:45,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 22:43:45,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 22:43:45,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 22:43:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:43:45,099 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 20 states. [2019-10-01 22:43:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:43:45,151 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2019-10-01 22:43:45,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 22:43:45,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2019-10-01 22:43:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:43:45,155 INFO L225 Difference]: With dead ends: 168 [2019-10-01 22:43:45,155 INFO L226 Difference]: Without dead ends: 105 [2019-10-01 22:43:45,156 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:43:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-01 22:43:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-10-01 22:43:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-01 22:43:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2019-10-01 22:43:45,163 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2019-10-01 22:43:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:43:45,163 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2019-10-01 22:43:45,163 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 22:43:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2019-10-01 22:43:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-01 22:43:45,164 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:43:45,165 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:43:45,165 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:43:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:43:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash 528015080, now seen corresponding path program 18 times [2019-10-01 22:43:45,165 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:43:45,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:43:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:45,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:43:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:43:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:43:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-01 22:43:45,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:43:45,374 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:43:45,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:44:13,005 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-10-01 22:44:13,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:44:13,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:44:13,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2019-10-01 22:44:13,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:13,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2019-10-01 22:44:13,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 22:44:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 22:44:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=762, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:44:13,276 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 33 states. [2019-10-01 22:44:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:13,466 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2019-10-01 22:44:13,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-01 22:44:13,467 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2019-10-01 22:44:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:13,468 INFO L225 Difference]: With dead ends: 176 [2019-10-01 22:44:13,468 INFO L226 Difference]: Without dead ends: 113 [2019-10-01 22:44:13,469 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=762, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:44:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-01 22:44:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-10-01 22:44:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-01 22:44:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2019-10-01 22:44:13,474 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2019-10-01 22:44:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:13,474 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2019-10-01 22:44:13,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 22:44:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2019-10-01 22:44:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-01 22:44:13,475 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:13,476 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:13,476 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -728428926, now seen corresponding path program 19 times [2019-10-01 22:44:13,476 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:13,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:13,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:13,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:44:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-01 22:44:13,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:13,726 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:13,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:44:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:13,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-01 22:44:13,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-01 22:44:13,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:13,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-01 22:44:13,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 22:44:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 22:44:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 22:44:13,840 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 22 states. [2019-10-01 22:44:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:13,918 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2019-10-01 22:44:13,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 22:44:13,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-10-01 22:44:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:13,921 INFO L225 Difference]: With dead ends: 180 [2019-10-01 22:44:13,921 INFO L226 Difference]: Without dead ends: 113 [2019-10-01 22:44:13,922 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 22:44:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-01 22:44:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-01 22:44:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-01 22:44:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2019-10-01 22:44:13,926 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2019-10-01 22:44:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:13,927 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2019-10-01 22:44:13,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 22:44:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2019-10-01 22:44:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-01 22:44:13,928 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:13,928 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:13,928 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 695197600, now seen corresponding path program 20 times [2019-10-01 22:44:13,928 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:13,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:13,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:13,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:44:13,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-01 22:44:14,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:14,167 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:14,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:44:14,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:44:14,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:44:14,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 22:44:14,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:44:14,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:14,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-01 22:44:14,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 22:44:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 22:44:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:44:14,284 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 23 states. [2019-10-01 22:44:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:14,358 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2019-10-01 22:44:14,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 22:44:14,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2019-10-01 22:44:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:14,361 INFO L225 Difference]: With dead ends: 182 [2019-10-01 22:44:14,361 INFO L226 Difference]: Without dead ends: 115 [2019-10-01 22:44:14,362 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:44:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-01 22:44:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-01 22:44:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-01 22:44:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2019-10-01 22:44:14,368 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2019-10-01 22:44:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:14,368 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2019-10-01 22:44:14,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 22:44:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2019-10-01 22:44:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-01 22:44:14,369 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:14,370 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:14,370 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:14,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1294278338, now seen corresponding path program 21 times [2019-10-01 22:44:14,370 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:14,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:14,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:44:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-01 22:44:14,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:14,727 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:14,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:44:25,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-10-01 22:44:25,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:44:25,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-01 22:44:25,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 64 proven. 169 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2019-10-01 22:44:25,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:25,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-10-01 22:44:25,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-01 22:44:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-01 22:44:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2019-10-01 22:44:25,687 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 41 states. [2019-10-01 22:44:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:26,371 INFO L93 Difference]: Finished difference Result 193 states and 204 transitions. [2019-10-01 22:44:26,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-01 22:44:26,371 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 109 [2019-10-01 22:44:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:26,372 INFO L225 Difference]: With dead ends: 193 [2019-10-01 22:44:26,372 INFO L226 Difference]: Without dead ends: 126 [2019-10-01 22:44:26,374 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=756, Invalid=2436, Unknown=0, NotChecked=0, Total=3192 [2019-10-01 22:44:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-01 22:44:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-10-01 22:44:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-01 22:44:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2019-10-01 22:44:26,379 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 109 [2019-10-01 22:44:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:26,380 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2019-10-01 22:44:26,380 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-01 22:44:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2019-10-01 22:44:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-01 22:44:26,381 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:26,381 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:26,381 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1579150350, now seen corresponding path program 22 times [2019-10-01 22:44:26,382 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:26,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:26,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:44:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:44:26,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:26,741 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:26,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:44:26,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:44:26,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:44:26,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:44:26,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:44:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:44:26,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:44:26,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 22:44:26,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:44:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:44:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:44:26,908 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 26 states. [2019-10-01 22:44:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:44:27,009 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2019-10-01 22:44:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 22:44:27,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2019-10-01 22:44:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:44:27,011 INFO L225 Difference]: With dead ends: 204 [2019-10-01 22:44:27,012 INFO L226 Difference]: Without dead ends: 129 [2019-10-01 22:44:27,012 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:44:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-01 22:44:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-10-01 22:44:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-01 22:44:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2019-10-01 22:44:27,018 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2019-10-01 22:44:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:44:27,018 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2019-10-01 22:44:27,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:44:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2019-10-01 22:44:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-01 22:44:27,019 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:44:27,019 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:44:27,020 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:44:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:44:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash 618719504, now seen corresponding path program 23 times [2019-10-01 22:44:27,020 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:44:27,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:44:27,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:27,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:44:27,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:44:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:44:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:44:27,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:44:27,401 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:44:27,445 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:46:23,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-01 22:46:23,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:46:23,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 22:46:23,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:46:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:46:23,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:46:23,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-10-01 22:46:23,704 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 22:46:23,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 22:46:23,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 22:46:23,705 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 27 states. [2019-10-01 22:46:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:46:23,793 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2019-10-01 22:46:23,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 22:46:23,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-10-01 22:46:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:46:23,796 INFO L225 Difference]: With dead ends: 206 [2019-10-01 22:46:23,797 INFO L226 Difference]: Without dead ends: 131 [2019-10-01 22:46:23,798 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 22:46:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-01 22:46:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-10-01 22:46:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-01 22:46:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2019-10-01 22:46:23,811 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2019-10-01 22:46:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:46:23,811 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2019-10-01 22:46:23,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 22:46:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2019-10-01 22:46:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-01 22:46:23,812 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:46:23,812 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:46:23,813 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:46:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:46:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash -352260434, now seen corresponding path program 24 times [2019-10-01 22:46:23,813 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:46:23,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:46:23,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:23,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:46:23,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:46:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:46:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:46:24,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:46:24,290 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:46:24,331 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:47:30,113 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-01 22:47:30,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:47:30,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 22:47:30,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:47:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:30,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:47:30,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-10-01 22:47:30,194 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 22:47:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 22:47:30,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:47:30,196 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 28 states. [2019-10-01 22:47:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:47:30,298 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2019-10-01 22:47:30,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 22:47:30,299 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2019-10-01 22:47:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:47:30,300 INFO L225 Difference]: With dead ends: 208 [2019-10-01 22:47:30,300 INFO L226 Difference]: Without dead ends: 133 [2019-10-01 22:47:30,301 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:47:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-01 22:47:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-10-01 22:47:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-01 22:47:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2019-10-01 22:47:30,306 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2019-10-01 22:47:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:47:30,306 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2019-10-01 22:47:30,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 22:47:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2019-10-01 22:47:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-01 22:47:30,308 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:47:30,308 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:47:30,308 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:47:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:47:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1456077620, now seen corresponding path program 25 times [2019-10-01 22:47:30,309 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:47:30,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:47:30,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:30,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:47:30,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:30,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:47:30,708 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:47:30,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:47:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:30,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 22:47:30,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:47:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:30,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:47:30,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-10-01 22:47:30,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 22:47:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 22:47:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 22:47:30,832 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 29 states. [2019-10-01 22:47:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:47:30,929 INFO L93 Difference]: Finished difference Result 210 states and 216 transitions. [2019-10-01 22:47:30,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 22:47:30,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 127 [2019-10-01 22:47:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:47:30,931 INFO L225 Difference]: With dead ends: 210 [2019-10-01 22:47:30,931 INFO L226 Difference]: Without dead ends: 135 [2019-10-01 22:47:30,932 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 22:47:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-01 22:47:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-01 22:47:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-01 22:47:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2019-10-01 22:47:30,937 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2019-10-01 22:47:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:47:30,937 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2019-10-01 22:47:30,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 22:47:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2019-10-01 22:47:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-01 22:47:30,938 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:47:30,939 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:47:30,939 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:47:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:47:30,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1367471254, now seen corresponding path program 26 times [2019-10-01 22:47:30,939 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:47:30,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:47:30,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:30,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:47:30,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:31,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:47:31,414 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:47:31,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:47:31,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:47:31,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:47:31,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 22:47:31,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:47:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:31,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:47:31,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-10-01 22:47:31,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 22:47:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 22:47:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 22:47:31,605 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 30 states. [2019-10-01 22:47:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:47:31,699 INFO L93 Difference]: Finished difference Result 212 states and 218 transitions. [2019-10-01 22:47:31,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-01 22:47:31,700 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 129 [2019-10-01 22:47:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:47:31,701 INFO L225 Difference]: With dead ends: 212 [2019-10-01 22:47:31,702 INFO L226 Difference]: Without dead ends: 137 [2019-10-01 22:47:31,704 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 22:47:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-01 22:47:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-10-01 22:47:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 22:47:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2019-10-01 22:47:31,710 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2019-10-01 22:47:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:47:31,710 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2019-10-01 22:47:31,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 22:47:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2019-10-01 22:47:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 22:47:31,711 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:47:31,712 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:47:31,712 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:47:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:47:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2116099448, now seen corresponding path program 27 times [2019-10-01 22:47:31,712 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:47:31,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:47:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:31,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:47:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 22:47:32,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:47:32,102 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:47:32,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:47:56,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-01 22:47:56,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:47:56,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 22:47:56,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:47:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 53 proven. 225 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2019-10-01 22:47:57,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:47:57,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 48 [2019-10-01 22:47:57,298 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-01 22:47:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-01 22:47:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2019-10-01 22:47:57,299 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 48 states. [2019-10-01 22:47:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:47:58,055 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2019-10-01 22:47:58,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-01 22:47:58,055 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 131 [2019-10-01 22:47:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:47:58,056 INFO L225 Difference]: With dead ends: 221 [2019-10-01 22:47:58,056 INFO L226 Difference]: Without dead ends: 146 [2019-10-01 22:47:58,058 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2019-10-01 22:47:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-01 22:47:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-10-01 22:47:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-01 22:47:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2019-10-01 22:47:58,064 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 131 [2019-10-01 22:47:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:47:58,064 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2019-10-01 22:47:58,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-01 22:47:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2019-10-01 22:47:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-01 22:47:58,065 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:47:58,065 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:47:58,066 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:47:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:47:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1291062464, now seen corresponding path program 28 times [2019-10-01 22:47:58,066 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:47:58,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:47:58,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:58,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:47:58,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-10-01 22:47:58,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:47:58,486 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:47:58,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:47:58,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:47:58,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:47:58,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:47:58,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:47:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1097 trivial. 0 not checked. [2019-10-01 22:47:58,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:47:58,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2019-10-01 22:47:58,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-01 22:47:58,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-01 22:47:58,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2019-10-01 22:47:58,931 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand 49 states. [2019-10-01 22:47:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:47:59,316 INFO L93 Difference]: Finished difference Result 232 states and 240 transitions. [2019-10-01 22:47:59,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-01 22:47:59,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 139 [2019-10-01 22:47:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:47:59,318 INFO L225 Difference]: With dead ends: 232 [2019-10-01 22:47:59,318 INFO L226 Difference]: Without dead ends: 153 [2019-10-01 22:47:59,320 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2019-10-01 22:47:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-01 22:47:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-10-01 22:47:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-01 22:47:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2019-10-01 22:47:59,326 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2019-10-01 22:47:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:47:59,326 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2019-10-01 22:47:59,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-01 22:47:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2019-10-01 22:47:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-01 22:47:59,327 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:47:59,327 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:47:59,328 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:47:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:47:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 330072282, now seen corresponding path program 29 times [2019-10-01 22:47:59,329 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:47:59,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:47:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:59,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:47:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:47:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:47:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1478 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1189 trivial. 0 not checked. [2019-10-01 22:47:59,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:47:59,630 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:47:59,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:50:32,509 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-10-01 22:50:32,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:50:32,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 22:50:32,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:50:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1478 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-10-01 22:50:33,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:50:33,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33] total 51 [2019-10-01 22:50:33,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-01 22:50:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-01 22:50:33,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=1833, Unknown=0, NotChecked=0, Total=2550 [2019-10-01 22:50:33,598 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 51 states. [2019-10-01 22:50:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:50:33,905 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2019-10-01 22:50:33,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-01 22:50:33,906 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 145 [2019-10-01 22:50:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:50:33,907 INFO L225 Difference]: With dead ends: 242 [2019-10-01 22:50:33,907 INFO L226 Difference]: Without dead ends: 159 [2019-10-01 22:50:33,909 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=1833, Unknown=0, NotChecked=0, Total=2550 [2019-10-01 22:50:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-01 22:50:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2019-10-01 22:50:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-01 22:50:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2019-10-01 22:50:33,917 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 145 [2019-10-01 22:50:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:50:33,918 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2019-10-01 22:50:33,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-01 22:50:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2019-10-01 22:50:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-01 22:50:33,919 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:50:33,920 INFO L411 BasicCegarLoop]: trace histogram [31, 31, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:50:33,920 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:50:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:50:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1009431284, now seen corresponding path program 30 times [2019-10-01 22:50:33,920 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:50:33,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:50:33,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:33,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:50:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:50:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:50:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2019-10-01 22:50:34,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:50:34,343 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:50:34,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:53:21,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2019-10-01 22:53:21,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:53:21,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 22:53:21,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:53:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-10-01 22:53:22,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:53:22,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2019-10-01 22:53:22,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-01 22:53:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-01 22:53:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=1986, Unknown=0, NotChecked=0, Total=2756 [2019-10-01 22:53:22,105 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand 53 states. [2019-10-01 22:53:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:53:22,447 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2019-10-01 22:53:22,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-01 22:53:22,448 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 151 [2019-10-01 22:53:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:53:22,449 INFO L225 Difference]: With dead ends: 252 [2019-10-01 22:53:22,449 INFO L226 Difference]: Without dead ends: 165 [2019-10-01 22:53:22,453 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=770, Invalid=1986, Unknown=0, NotChecked=0, Total=2756 [2019-10-01 22:53:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-01 22:53:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-10-01 22:53:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-01 22:53:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2019-10-01 22:53:22,459 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2019-10-01 22:53:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:53:22,460 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2019-10-01 22:53:22,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-01 22:53:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2019-10-01 22:53:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-01 22:53:22,461 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:53:22,461 INFO L411 BasicCegarLoop]: trace histogram [32, 32, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:53:22,461 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:53:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:53:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1341204878, now seen corresponding path program 31 times [2019-10-01 22:53:22,462 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:53:22,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:53:22,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:22,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:53:22,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:53:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2019-10-01 22:53:22,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:53:22,757 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:53:22,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:53:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:53:22,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-01 22:53:22,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:53:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2019-10-01 22:53:23,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:53:23,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35] total 55 [2019-10-01 22:53:23,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-01 22:53:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-01 22:53:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=2145, Unknown=0, NotChecked=0, Total=2970 [2019-10-01 22:53:23,619 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 55 states. [2019-10-01 22:53:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:53:23,940 INFO L93 Difference]: Finished difference Result 262 states and 270 transitions. [2019-10-01 22:53:23,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-01 22:53:23,940 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 157 [2019-10-01 22:53:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:53:23,942 INFO L225 Difference]: With dead ends: 262 [2019-10-01 22:53:23,942 INFO L226 Difference]: Without dead ends: 171 [2019-10-01 22:53:23,944 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=2145, Unknown=0, NotChecked=0, Total=2970 [2019-10-01 22:53:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-01 22:53:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2019-10-01 22:53:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-10-01 22:53:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2019-10-01 22:53:23,950 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 157 [2019-10-01 22:53:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:53:23,950 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2019-10-01 22:53:23,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-01 22:53:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2019-10-01 22:53:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-01 22:53:23,951 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:53:23,951 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:53:23,952 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:53:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:53:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1242397528, now seen corresponding path program 32 times [2019-10-01 22:53:23,952 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:53:23,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:53:23,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:23,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:53:23,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:53:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-10-01 22:53:24,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:53:24,668 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:53:24,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:53:24,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:53:24,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:53:24,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-01 22:53:24,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:53:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-10-01 22:53:24,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:53:24,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-10-01 22:53:24,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-01 22:53:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-01 22:53:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-10-01 22:53:24,837 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 37 states. [2019-10-01 22:53:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:53:24,961 INFO L93 Difference]: Finished difference Result 266 states and 272 transitions. [2019-10-01 22:53:24,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-01 22:53:24,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 163 [2019-10-01 22:53:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:53:24,963 INFO L225 Difference]: With dead ends: 266 [2019-10-01 22:53:24,963 INFO L226 Difference]: Without dead ends: 171 [2019-10-01 22:53:24,964 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-10-01 22:53:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-01 22:53:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2019-10-01 22:53:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-10-01 22:53:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2019-10-01 22:53:24,970 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 163 [2019-10-01 22:53:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:53:24,971 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2019-10-01 22:53:24,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-01 22:53:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2019-10-01 22:53:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-01 22:53:24,972 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:53:24,972 INFO L411 BasicCegarLoop]: trace histogram [34, 34, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:53:24,972 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:53:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:53:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash -943451066, now seen corresponding path program 33 times [2019-10-01 22:53:24,973 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:53:24,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:53:24,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:24,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:53:24,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:53:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:53:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1556 trivial. 0 not checked. [2019-10-01 22:53:25,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:53:25,395 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:53:25,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:54:47,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-01 22:54:47,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:54:47,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-01 22:54:47,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:54:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 106 proven. 400 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2019-10-01 22:54:47,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:54:47,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 28 [2019-10-01 22:54:47,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 22:54:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 22:54:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:54:47,657 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand 28 states. [2019-10-01 22:54:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:54:48,238 INFO L93 Difference]: Finished difference Result 231 states and 239 transitions. [2019-10-01 22:54:48,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 22:54:48,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2019-10-01 22:54:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:54:48,240 INFO L225 Difference]: With dead ends: 231 [2019-10-01 22:54:48,241 INFO L226 Difference]: Without dead ends: 178 [2019-10-01 22:54:48,242 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=929, Invalid=1621, Unknown=0, NotChecked=0, Total=2550 [2019-10-01 22:54:48,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-01 22:54:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-10-01 22:54:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-01 22:54:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2019-10-01 22:54:48,248 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 165 [2019-10-01 22:54:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:54:48,249 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2019-10-01 22:54:48,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 22:54:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2019-10-01 22:54:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-01 22:54:48,250 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:54:48,250 INFO L411 BasicCegarLoop]: trace histogram [34, 34, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:54:48,250 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:54:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:54:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash -595114434, now seen corresponding path program 34 times [2019-10-01 22:54:48,251 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:54:48,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:54:48,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:54:48,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:54:48,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:54:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:54:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-10-01 22:54:48,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:54:48,597 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:54:48,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:54:48,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:54:48,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:54:48,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:54:48,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:54:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-10-01 22:54:48,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:54:48,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 22:54:48,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:54:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:54:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:54:48,784 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 26 states. [2019-10-01 22:54:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:54:48,952 INFO L93 Difference]: Finished difference Result 241 states and 247 transitions. [2019-10-01 22:54:48,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 22:54:48,953 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 173 [2019-10-01 22:54:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:54:48,955 INFO L225 Difference]: With dead ends: 241 [2019-10-01 22:54:48,956 INFO L226 Difference]: Without dead ends: 184 [2019-10-01 22:54:48,956 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:54:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-01 22:54:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2019-10-01 22:54:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-10-01 22:54:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2019-10-01 22:54:48,963 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 173 [2019-10-01 22:54:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:54:48,963 INFO L475 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2019-10-01 22:54:48,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:54:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2019-10-01 22:54:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-01 22:54:48,965 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:54:48,965 INFO L411 BasicCegarLoop]: trace histogram [34, 34, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:54:48,965 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:54:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:54:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2142717382, now seen corresponding path program 35 times [2019-10-01 22:54:48,966 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:54:48,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:54:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:54:48,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:54:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:54:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:54:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1685 trivial. 0 not checked. [2019-10-01 22:54:49,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:54:49,322 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:54:49,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1