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_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:44:55,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:44:55,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:44:55,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:44:55,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:44:55,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:44:55,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:44:55,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:44:55,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:44:55,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:44:55,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:44:55,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:44:55,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:44:55,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:44:55,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:44:55,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:44:55,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:44:55,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:44:55,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:44:55,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:44:55,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:44:55,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:44:55,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:44:55,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:44:55,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:44:55,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:44:55,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:44:55,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:44:55,523 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 [2019-09-07 09:44:55,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:44:55,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:44:55,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:44:55,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:44:55,546 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:44:55,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:44:55,546 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:44:55,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:44:55,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:44:55,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:44:55,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:44:55,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:44:55,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:44:55,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:44:55,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:44:55,549 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:44:55,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:44:55,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:44:55,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:44:55,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:44:55,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:44:55,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:44:55,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:44:55,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:44:55,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:44:55,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:44:55,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:44:55,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:44:55,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:44:55,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:44:55,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:44:55,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:44:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:44:55,621 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:44:55,621 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-09-07 09:44:55,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef87afd/57d53c04206b45fc8b4f9e984711a44a/FLAGda89032e9 [2019-09-07 09:44:56,218 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:44:56,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-09-07 09:44:56,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef87afd/57d53c04206b45fc8b4f9e984711a44a/FLAGda89032e9 [2019-09-07 09:44:56,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef87afd/57d53c04206b45fc8b4f9e984711a44a [2019-09-07 09:44:56,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:44:56,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:44:56,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:56,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:44:56,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:44:56,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:56,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af4869c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56, skipping insertion in model container [2019-09-07 09:44:56,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:56,583 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:44:56,602 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:44:56,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:56,817 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:44:56,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:56,967 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:44:56,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56 WrapperNode [2019-09-07 09:44:56,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:56,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:44:56,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:44:56,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:44:56,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:56,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:56,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:56,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:57,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:57,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:57,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (1/1) ... [2019-09-07 09:44:57,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:44:57,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:44:57,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:44:57,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:44:57,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (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 [2019-09-07 09:44:57,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:44:57,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:44:57,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:44:57,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:44:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:44:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:44:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:44:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:44:57,555 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:44:57,556 INFO L283 CfgBuilder]: Removed 11 assume(true) statements. [2019-09-07 09:44:57,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:57 BoogieIcfgContainer [2019-09-07 09:44:57,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:44:57,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:44:57,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:44:57,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:44:57,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:44:56" (1/3) ... [2019-09-07 09:44:57,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c1405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:57, skipping insertion in model container [2019-09-07 09:44:57,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:56" (2/3) ... [2019-09-07 09:44:57,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c1405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:57, skipping insertion in model container [2019-09-07 09:44:57,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:57" (3/3) ... [2019-09-07 09:44:57,566 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2019-09-07 09:44:57,574 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:44:57,581 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:44:57,597 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:44:57,628 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:44:57,629 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:44:57,629 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:44:57,629 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:44:57,629 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:44:57,629 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:44:57,630 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:44:57,630 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:44:57,630 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:44:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-09-07 09:44:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:44:57,656 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:57,657 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:57,659 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2019-09-07 09:44:57,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:57,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:57,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:57,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:57,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:44:57,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:57,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:44:57,841 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:44:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:44:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:44:57,859 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2019-09-07 09:44:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:57,887 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2019-09-07 09:44:57,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:44:57,888 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2019-09-07 09:44:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:57,897 INFO L225 Difference]: With dead ends: 94 [2019-09-07 09:44:57,897 INFO L226 Difference]: Without dead ends: 46 [2019-09-07 09:44:57,901 INFO L628 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 [2019-09-07 09:44:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-07 09:44:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-07 09:44:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 09:44:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-09-07 09:44:57,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2019-09-07 09:44:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:57,945 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-09-07 09:44:57,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:44:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-09-07 09:44:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:44:57,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:57,947 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:57,948 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2019-09-07 09:44:57,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:57,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:57,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:57,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:57,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:44:58,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:58,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:58,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:58,038 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2019-09-07 09:44:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:58,092 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-09-07 09:44:58,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:58,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-09-07 09:44:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:58,096 INFO L225 Difference]: With dead ends: 86 [2019-09-07 09:44:58,097 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 09:44:58,099 INFO L628 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 [2019-09-07 09:44:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 09:44:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-09-07 09:44:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 09:44:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-09-07 09:44:58,108 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2019-09-07 09:44:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:58,109 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-09-07 09:44:58,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-09-07 09:44:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-07 09:44:58,111 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:58,111 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:58,111 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash -953933084, now seen corresponding path program 1 times [2019-09-07 09:44:58,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:58,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:58,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:58,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:44:58,211 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:58,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:58,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:58,213 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 3 states. [2019-09-07 09:44:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:58,383 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2019-09-07 09:44:58,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:58,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-09-07 09:44:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:58,387 INFO L225 Difference]: With dead ends: 100 [2019-09-07 09:44:58,387 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 09:44:58,388 INFO L628 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 [2019-09-07 09:44:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 09:44:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-09-07 09:44:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 09:44:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-09-07 09:44:58,409 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2019-09-07 09:44:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:58,409 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-09-07 09:44:58,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-09-07 09:44:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 09:44:58,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:58,416 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:58,416 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2019-09-07 09:44:58,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:58,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:58,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:58,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:44:58,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:58,625 INFO L223 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 [2019-09-07 09:44:58,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:58,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:58,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:58,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:58,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:58,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:58,751 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 5 states. [2019-09-07 09:44:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:58,813 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-09-07 09:44:58,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:58,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-09-07 09:44:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:58,816 INFO L225 Difference]: With dead ends: 106 [2019-09-07 09:44:58,816 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 09:44:58,817 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 09:44:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-09-07 09:44:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 09:44:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-09-07 09:44:58,825 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 51 [2019-09-07 09:44:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:58,825 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-09-07 09:44:58,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-09-07 09:44:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 09:44:58,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:58,827 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:58,828 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 194854992, now seen corresponding path program 2 times [2019-09-07 09:44:58,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:58,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:58,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:58,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:44:58,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:58,914 INFO L223 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) [2019-09-07 09:44:58,929 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 [2019-09-07 09:44:59,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:44:59,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:59,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:59,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:44:59,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:59,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:59,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:59,033 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 5 states. [2019-09-07 09:44:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:59,229 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2019-09-07 09:44:59,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:59,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-09-07 09:44:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:59,236 INFO L225 Difference]: With dead ends: 128 [2019-09-07 09:44:59,236 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 09:44:59,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 09:44:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-09-07 09:44:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 09:44:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-09-07 09:44:59,259 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 53 [2019-09-07 09:44:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:59,259 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-09-07 09:44:59,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-09-07 09:44:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 09:44:59,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:59,262 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:59,266 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash 573040542, now seen corresponding path program 3 times [2019-09-07 09:44:59,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:59,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:59,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:59,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:59,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:44:59,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:59,432 INFO L223 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) [2019-09-07 09:44:59,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:59,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:44:59,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:59,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:44:59,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:59,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:59,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:44:59,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:44:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:44:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:59,576 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 8 states. [2019-09-07 09:44:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:59,885 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2019-09-07 09:44:59,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:44:59,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2019-09-07 09:44:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:59,891 INFO L225 Difference]: With dead ends: 171 [2019-09-07 09:44:59,891 INFO L226 Difference]: Without dead ends: 106 [2019-09-07 09:44:59,894 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-07 09:44:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2019-09-07 09:44:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 09:44:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2019-09-07 09:44:59,923 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 71 [2019-09-07 09:44:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:59,923 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2019-09-07 09:44:59,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:44:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2019-09-07 09:44:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 09:44:59,931 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:59,931 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:59,931 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash -134036470, now seen corresponding path program 4 times [2019-09-07 09:44:59,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:59,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:59,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:59,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:59,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:45:00,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:00,083 INFO L223 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) [2019-09-07 09:45:00,100 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 [2019-09-07 09:45:00,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:00,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:00,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:45:00,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:45:00,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:00,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:45:00,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:45:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:45:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:45:00,213 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 7 states. [2019-09-07 09:45:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:00,243 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2019-09-07 09:45:00,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:45:00,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2019-09-07 09:45:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:00,247 INFO L225 Difference]: With dead ends: 182 [2019-09-07 09:45:00,247 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 09:45:00,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:45:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 09:45:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-09-07 09:45:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-07 09:45:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-09-07 09:45:00,265 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 91 [2019-09-07 09:45:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:00,265 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-09-07 09:45:00,265 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:45:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-09-07 09:45:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 09:45:00,271 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:00,272 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:00,272 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1977892568, now seen corresponding path program 5 times [2019-09-07 09:45:00,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:00,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:00,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:00,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:00,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-07 09:45:00,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:00,411 INFO L223 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) [2019-09-07 09:45:00,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:24,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:45:24,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:24,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:45:24,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-07 09:45:24,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:24,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:45:24,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:45:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:45:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:45:24,758 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2019-09-07 09:45:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:24,990 INFO L93 Difference]: Finished difference Result 200 states and 227 transitions. [2019-09-07 09:45:24,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:45:24,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2019-09-07 09:45:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:24,993 INFO L225 Difference]: With dead ends: 200 [2019-09-07 09:45:24,993 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 09:45:24,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:45:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 09:45:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2019-09-07 09:45:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 09:45:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2019-09-07 09:45:25,010 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2019-09-07 09:45:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:25,011 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2019-09-07 09:45:25,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:45:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2019-09-07 09:45:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 09:45:25,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:25,016 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:25,016 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 517595766, now seen corresponding path program 6 times [2019-09-07 09:45:25,021 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:25,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:25,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:25,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:25,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:45:25,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:25,179 INFO L223 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:25,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:45:26,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:45:26,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:26,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:45:26,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:45:26,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:26,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:45:26,499 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:45:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:45:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:26,500 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 12 states. [2019-09-07 09:45:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:26,848 INFO L93 Difference]: Finished difference Result 247 states and 276 transitions. [2019-09-07 09:45:26,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:45:26,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2019-09-07 09:45:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:26,851 INFO L225 Difference]: With dead ends: 247 [2019-09-07 09:45:26,851 INFO L226 Difference]: Without dead ends: 146 [2019-09-07 09:45:26,852 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-07 09:45:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2019-09-07 09:45:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 09:45:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2019-09-07 09:45:26,873 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 111 [2019-09-07 09:45:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:26,873 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2019-09-07 09:45:26,873 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:45:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2019-09-07 09:45:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 09:45:26,876 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:26,876 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:26,876 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash -295943454, now seen corresponding path program 7 times [2019-09-07 09:45:26,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:26,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:26,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:26,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:45:27,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:27,045 INFO L223 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) [2019-09-07 09:45:27,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:27,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:45:27,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:45:27,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:27,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:45:27,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:45:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:45:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:45:27,224 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 9 states. [2019-09-07 09:45:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:27,270 INFO L93 Difference]: Finished difference Result 258 states and 278 transitions. [2019-09-07 09:45:27,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:45:27,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2019-09-07 09:45:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:27,272 INFO L225 Difference]: With dead ends: 258 [2019-09-07 09:45:27,272 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 09:45:27,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:45:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 09:45:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-09-07 09:45:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-07 09:45:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-09-07 09:45:27,289 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 131 [2019-09-07 09:45:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:27,289 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-09-07 09:45:27,289 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:45:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-09-07 09:45:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-07 09:45:27,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:27,294 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:27,295 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1303988736, now seen corresponding path program 8 times [2019-09-07 09:45:27,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:27,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:27,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:45:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-09-07 09:45:27,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:27,460 INFO L223 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) [2019-09-07 09:45:27,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:27,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:45:27,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:27,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:45:27,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:45:27,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:27,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:45:27,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:45:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:45:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:45:27,655 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 15 states. [2019-09-07 09:45:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:27,975 INFO L93 Difference]: Finished difference Result 287 states and 316 transitions. [2019-09-07 09:45:27,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:45:27,976 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2019-09-07 09:45:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:27,977 INFO L225 Difference]: With dead ends: 287 [2019-09-07 09:45:27,977 INFO L226 Difference]: Without dead ends: 168 [2019-09-07 09:45:27,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:45:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-09-07 09:45:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2019-09-07 09:45:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-07 09:45:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2019-09-07 09:45:27,987 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 133 [2019-09-07 09:45:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:27,988 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2019-09-07 09:45:27,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:45:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2019-09-07 09:45:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-07 09:45:27,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:27,990 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:27,991 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2093403796, now seen corresponding path program 9 times [2019-09-07 09:45:27,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:27,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:27,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:27,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:27,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-09-07 09:45:28,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:28,131 INFO L223 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) [2019-09-07 09:45:28,145 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 [2019-09-07 09:45:41,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:45:41,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:41,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-07 09:45:41,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 46 proven. 36 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-09-07 09:45:41,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:41,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2019-09-07 09:45:41,898 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:45:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:45:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:45:41,899 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand 14 states. [2019-09-07 09:45:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:42,436 INFO L93 Difference]: Finished difference Result 317 states and 353 transitions. [2019-09-07 09:45:42,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:45:42,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-09-07 09:45:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:42,438 INFO L225 Difference]: With dead ends: 317 [2019-09-07 09:45:42,438 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 09:45:42,439 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:45:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 09:45:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2019-09-07 09:45:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:45:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 204 transitions. [2019-09-07 09:45:42,450 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 204 transitions. Word has length 153 [2019-09-07 09:45:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:42,450 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 204 transitions. [2019-09-07 09:45:42,450 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:45:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 204 transitions. [2019-09-07 09:45:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-07 09:45:42,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:42,453 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:42,453 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1724339576, now seen corresponding path program 10 times [2019-09-07 09:45:42,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:42,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:42,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:42,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:42,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:45:42,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:42,611 INFO L223 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:42,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:45:42,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:42,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:42,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:45:42,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:45:42,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:42,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:45:42,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:45:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:45:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:45:42,807 INFO L87 Difference]: Start difference. First operand 194 states and 204 transitions. Second operand 11 states. [2019-09-07 09:45:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:42,870 INFO L93 Difference]: Finished difference Result 370 states and 390 transitions. [2019-09-07 09:45:42,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:45:42,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 189 [2019-09-07 09:45:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:42,872 INFO L225 Difference]: With dead ends: 370 [2019-09-07 09:45:42,873 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 09:45:42,874 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:45:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 09:45:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-09-07 09:45:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 09:45:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 206 transitions. [2019-09-07 09:45:42,884 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 206 transitions. Word has length 189 [2019-09-07 09:45:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:42,885 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 206 transitions. [2019-09-07 09:45:42,885 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:45:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 206 transitions. [2019-09-07 09:45:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-07 09:45:42,889 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:42,889 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:45:42,890 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:42,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2009272282, now seen corresponding path program 11 times [2019-09-07 09:45:42,890 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:42,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:42,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:42,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:42,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:45:43,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:43,108 INFO L223 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) [2019-09-07 09:45:43,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:00,829 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:47:00,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:00,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:47:00,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:47:01,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:01,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-09-07 09:47:01,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:47:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:47:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:47:01,071 INFO L87 Difference]: Start difference. First operand 196 states and 206 transitions. Second operand 20 states. [2019-09-07 09:47:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:01,577 INFO L93 Difference]: Finished difference Result 399 states and 428 transitions. [2019-09-07 09:47:01,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:47:01,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 191 [2019-09-07 09:47:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:01,580 INFO L225 Difference]: With dead ends: 399 [2019-09-07 09:47:01,580 INFO L226 Difference]: Without dead ends: 226 [2019-09-07 09:47:01,581 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:47:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-09-07 09:47:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 216. [2019-09-07 09:47:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-07 09:47:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 226 transitions. [2019-09-07 09:47:01,594 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 226 transitions. Word has length 191 [2019-09-07 09:47:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:01,595 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 226 transitions. [2019-09-07 09:47:01,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:47:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 226 transitions. [2019-09-07 09:47:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-07 09:47:01,598 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:01,598 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:01,598 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash -180201326, now seen corresponding path program 12 times [2019-09-07 09:47:01,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:01,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:01,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:01,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:01,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:47:01,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:01,827 INFO L223 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) [2019-09-07 09:47:01,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:02,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:48:02,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:02,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:48:02,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2019-09-07 09:48:03,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:03,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-09-07 09:48:03,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:48:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:48:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:48:03,157 INFO L87 Difference]: Start difference. First operand 216 states and 226 transitions. Second operand 24 states. [2019-09-07 09:48:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:03,797 INFO L93 Difference]: Finished difference Result 446 states and 484 transitions. [2019-09-07 09:48:03,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:48:03,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 211 [2019-09-07 09:48:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:03,799 INFO L225 Difference]: With dead ends: 446 [2019-09-07 09:48:03,800 INFO L226 Difference]: Without dead ends: 255 [2019-09-07 09:48:03,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:48:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-09-07 09:48:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2019-09-07 09:48:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2019-09-07 09:48:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 264 transitions. [2019-09-07 09:48:03,856 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 264 transitions. Word has length 211 [2019-09-07 09:48:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:03,856 INFO L475 AbstractCegarLoop]: Abstraction has 254 states and 264 transitions. [2019-09-07 09:48:03,856 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:48:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 264 transitions. [2019-09-07 09:48:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-09-07 09:48:03,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:03,863 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:03,864 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1159783732, now seen corresponding path program 13 times [2019-09-07 09:48:03,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:03,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:03,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 09:48:04,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:04,203 INFO L223 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) [2019-09-07 09:48:04,218 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 [2019-09-07 09:48:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:04,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:48:04,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 09:48:04,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:04,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:48:04,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:48:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:48:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:48:04,403 INFO L87 Difference]: Start difference. First operand 254 states and 264 transitions. Second operand 14 states. [2019-09-07 09:48:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:04,466 INFO L93 Difference]: Finished difference Result 484 states and 504 transitions. [2019-09-07 09:48:04,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:48:04,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 249 [2019-09-07 09:48:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:04,468 INFO L225 Difference]: With dead ends: 484 [2019-09-07 09:48:04,469 INFO L226 Difference]: Without dead ends: 257 [2019-09-07 09:48:04,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:48:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-09-07 09:48:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-09-07 09:48:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-09-07 09:48:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 266 transitions. [2019-09-07 09:48:04,482 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 266 transitions. Word has length 249 [2019-09-07 09:48:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:04,483 INFO L475 AbstractCegarLoop]: Abstraction has 256 states and 266 transitions. [2019-09-07 09:48:04,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:48:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 266 transitions. [2019-09-07 09:48:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-07 09:48:04,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:04,486 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:04,487 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1958670186, now seen corresponding path program 14 times [2019-09-07 09:48:04,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:04,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:04,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 09:48:04,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:04,849 INFO L223 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) [2019-09-07 09:48:04,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:04,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:48:04,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:04,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:48:04,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 09:48:05,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:05,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:48:05,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:48:05,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:48:05,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:05,053 INFO L87 Difference]: Start difference. First operand 256 states and 266 transitions. Second operand 15 states. [2019-09-07 09:48:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:05,111 INFO L93 Difference]: Finished difference Result 486 states and 506 transitions. [2019-09-07 09:48:05,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:48:05,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 251 [2019-09-07 09:48:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:05,114 INFO L225 Difference]: With dead ends: 486 [2019-09-07 09:48:05,114 INFO L226 Difference]: Without dead ends: 259 [2019-09-07 09:48:05,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-09-07 09:48:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2019-09-07 09:48:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2019-09-07 09:48:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 268 transitions. [2019-09-07 09:48:05,125 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 268 transitions. Word has length 251 [2019-09-07 09:48:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:05,125 INFO L475 AbstractCegarLoop]: Abstraction has 258 states and 268 transitions. [2019-09-07 09:48:05,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:48:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 268 transitions. [2019-09-07 09:48:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-07 09:48:05,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:05,129 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:05,129 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash 905712776, now seen corresponding path program 15 times [2019-09-07 09:48:05,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:05,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:05,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:05,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:05,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2019-09-07 09:48:05,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:05,401 INFO L223 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 [2019-09-07 09:48:05,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:49:20,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:49:20,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:20,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 46 conjunts are in the unsatisfiable core [2019-09-07 09:49:20,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 44 proven. 121 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2019-09-07 09:49:20,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:20,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 19 [2019-09-07 09:49:20,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:49:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:49:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:49:20,843 INFO L87 Difference]: Start difference. First operand 258 states and 268 transitions. Second operand 19 states. [2019-09-07 09:49:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:21,807 INFO L93 Difference]: Finished difference Result 497 states and 533 transitions. [2019-09-07 09:49:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:49:21,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 253 [2019-09-07 09:49:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:21,809 INFO L225 Difference]: With dead ends: 497 [2019-09-07 09:49:21,810 INFO L226 Difference]: Without dead ends: 294 [2019-09-07 09:49:21,811 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:49:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-07 09:49:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-07 09:49:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-07 09:49:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 304 transitions. [2019-09-07 09:49:21,824 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 304 transitions. Word has length 253 [2019-09-07 09:49:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:21,825 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 304 transitions. [2019-09-07 09:49:21,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:49:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 304 transitions. [2019-09-07 09:49:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-09-07 09:49:21,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:21,827 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:21,828 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 104214436, now seen corresponding path program 16 times [2019-09-07 09:49:21,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:21,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:21,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:21,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:21,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2019-09-07 09:49:22,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:22,218 INFO L223 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 [2019-09-07 09:49:22,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:49:22,434 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:49:22,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:22,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:49:22,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:49:22,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:22,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2019-09-07 09:49:22,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:49:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:49:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:49:22,846 INFO L87 Difference]: Start difference. First operand 294 states and 304 transitions. Second operand 29 states. [2019-09-07 09:49:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:23,590 INFO L93 Difference]: Finished difference Result 587 states and 616 transitions. [2019-09-07 09:49:23,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:49:23,591 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 289 [2019-09-07 09:49:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:23,594 INFO L225 Difference]: With dead ends: 587 [2019-09-07 09:49:23,594 INFO L226 Difference]: Without dead ends: 324 [2019-09-07 09:49:23,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:49:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2019-09-07 09:49:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 314. [2019-09-07 09:49:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-09-07 09:49:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 324 transitions. [2019-09-07 09:49:23,612 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 324 transitions. Word has length 289 [2019-09-07 09:49:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:23,612 INFO L475 AbstractCegarLoop]: Abstraction has 314 states and 324 transitions. [2019-09-07 09:49:23,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:49:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 324 transitions. [2019-09-07 09:49:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-09-07 09:49:23,615 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:23,615 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:23,616 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash -143368944, now seen corresponding path program 17 times [2019-09-07 09:49:23,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:23,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:23,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:23,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:23,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-09-07 09:49:24,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:24,016 INFO L223 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) [2019-09-07 09:49:24,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:51:55,314 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 09:51:55,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:55,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:51:55,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2019-09-07 09:51:55,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:55,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:51:55,731 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:51:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:51:55,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:51:55,732 INFO L87 Difference]: Start difference. First operand 314 states and 324 transitions. Second operand 31 states. [2019-09-07 09:51:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:56,540 INFO L93 Difference]: Finished difference Result 625 states and 654 transitions. [2019-09-07 09:51:56,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:51:56,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 309 [2019-09-07 09:51:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:56,546 INFO L225 Difference]: With dead ends: 625 [2019-09-07 09:51:56,547 INFO L226 Difference]: Without dead ends: 344 [2019-09-07 09:51:56,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:51:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-09-07 09:51:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 334. [2019-09-07 09:51:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2019-09-07 09:51:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 344 transitions. [2019-09-07 09:51:56,569 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 344 transitions. Word has length 309 [2019-09-07 09:51:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:56,569 INFO L475 AbstractCegarLoop]: Abstraction has 334 states and 344 transitions. [2019-09-07 09:51:56,569 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:51:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 344 transitions. [2019-09-07 09:51:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-09-07 09:51:56,572 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:56,573 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:56,573 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash 724061308, now seen corresponding path program 18 times [2019-09-07 09:51:56,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:56,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:56,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:56,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2019-09-07 09:51:56,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:56,998 INFO L223 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) [2019-09-07 09:51:57,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:13,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 09:54:13,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:13,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-07 09:54:13,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2019-09-07 09:54:13,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:13,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 09:54:13,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:54:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:54:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:54:13,590 INFO L87 Difference]: Start difference. First operand 334 states and 344 transitions. Second operand 33 states. [2019-09-07 09:54:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:14,538 INFO L93 Difference]: Finished difference Result 663 states and 692 transitions. [2019-09-07 09:54:14,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:54:14,539 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 329 [2019-09-07 09:54:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:14,541 INFO L225 Difference]: With dead ends: 663 [2019-09-07 09:54:14,541 INFO L226 Difference]: Without dead ends: 364 [2019-09-07 09:54:14,543 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:54:14,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-09-07 09:54:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 354. [2019-09-07 09:54:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-09-07 09:54:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 364 transitions. [2019-09-07 09:54:14,555 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 364 transitions. Word has length 329 [2019-09-07 09:54:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:14,555 INFO L475 AbstractCegarLoop]: Abstraction has 354 states and 364 transitions. [2019-09-07 09:54:14,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:54:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 364 transitions. [2019-09-07 09:54:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-09-07 09:54:14,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:14,558 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:14,558 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash -968819224, now seen corresponding path program 19 times [2019-09-07 09:54:14,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:14,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:14,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:14,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:14,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2529 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2019-09-07 09:54:14,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:14,932 INFO L223 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) [2019-09-07 09:54:14,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:15,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:54:15,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2529 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2019-09-07 09:54:15,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:15,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:54:15,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:54:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:54:15,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:54:15,300 INFO L87 Difference]: Start difference. First operand 354 states and 364 transitions. Second operand 19 states. [2019-09-07 09:54:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:15,379 INFO L93 Difference]: Finished difference Result 674 states and 694 transitions. [2019-09-07 09:54:15,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:54:15,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 349 [2019-09-07 09:54:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:15,382 INFO L225 Difference]: With dead ends: 674 [2019-09-07 09:54:15,382 INFO L226 Difference]: Without dead ends: 357 [2019-09-07 09:54:15,383 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:54:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2019-09-07 09:54:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2019-09-07 09:54:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2019-09-07 09:54:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 366 transitions. [2019-09-07 09:54:15,395 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 366 transitions. Word has length 349 [2019-09-07 09:54:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:15,396 INFO L475 AbstractCegarLoop]: Abstraction has 356 states and 366 transitions. [2019-09-07 09:54:15,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:54:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 366 transitions. [2019-09-07 09:54:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2019-09-07 09:54:15,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:15,399 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:15,399 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash 337603462, now seen corresponding path program 20 times [2019-09-07 09:54:15,399 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:15,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:15,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:15,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:15,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2019-09-07 09:54:15,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:15,899 INFO L223 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) [2019-09-07 09:54:15,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:16,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:54:16,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:16,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:54:16,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2019-09-07 09:54:16,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:16,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:54:16,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:54:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:54:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:54:16,196 INFO L87 Difference]: Start difference. First operand 356 states and 366 transitions. Second operand 20 states. [2019-09-07 09:54:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:16,272 INFO L93 Difference]: Finished difference Result 676 states and 696 transitions. [2019-09-07 09:54:16,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:54:16,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 351 [2019-09-07 09:54:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:16,274 INFO L225 Difference]: With dead ends: 676 [2019-09-07 09:54:16,275 INFO L226 Difference]: Without dead ends: 359 [2019-09-07 09:54:16,276 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:54:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-09-07 09:54:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 358. [2019-09-07 09:54:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2019-09-07 09:54:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 368 transitions. [2019-09-07 09:54:16,291 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 368 transitions. Word has length 351 [2019-09-07 09:54:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:16,291 INFO L475 AbstractCegarLoop]: Abstraction has 358 states and 368 transitions. [2019-09-07 09:54:16,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:54:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 368 transitions. [2019-09-07 09:54:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-09-07 09:54:16,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:16,294 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:16,294 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1679354276, now seen corresponding path program 21 times [2019-09-07 09:54:16,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:16,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:16,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:16,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:16,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2337 trivial. 0 not checked. [2019-09-07 09:54:16,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:16,676 INFO L223 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 [2019-09-07 09:54:16,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:56:33,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-07 09:56:33,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:33,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-07 09:56:33,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:56:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 95 proven. 256 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2019-09-07 09:56:33,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:56:33,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2019-09-07 09:56:33,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:56:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:56:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:56:33,467 INFO L87 Difference]: Start difference. First operand 358 states and 368 transitions. Second operand 24 states. [2019-09-07 09:56:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:56:34,587 INFO L93 Difference]: Finished difference Result 677 states and 713 transitions. [2019-09-07 09:56:34,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:56:34,587 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 353 [2019-09-07 09:56:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:56:34,589 INFO L225 Difference]: With dead ends: 677 [2019-09-07 09:56:34,589 INFO L226 Difference]: Without dead ends: 394 [2019-09-07 09:56:34,590 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:56:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2019-09-07 09:56:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2019-09-07 09:56:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-09-07 09:56:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 404 transitions. [2019-09-07 09:56:34,602 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 404 transitions. Word has length 353 [2019-09-07 09:56:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:56:34,603 INFO L475 AbstractCegarLoop]: Abstraction has 394 states and 404 transitions. [2019-09-07 09:56:34,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:56:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 404 transitions. [2019-09-07 09:56:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-09-07 09:56:34,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:56:34,606 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:56:34,606 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:56:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:56:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1445157184, now seen corresponding path program 22 times [2019-09-07 09:56:34,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:56:34,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:56:34,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:34,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:56:34,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:56:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2019-09-07 09:56:35,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:56:35,009 INFO L223 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 [2019-09-07 09:56:35,051 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:56:35,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:56:35,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:35,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:56:35,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:56:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2019-09-07 09:56:35,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:56:35,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 09:56:35,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:56:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:56:35,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:56:35,441 INFO L87 Difference]: Start difference. First operand 394 states and 404 transitions. Second operand 21 states. [2019-09-07 09:56:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:56:35,523 INFO L93 Difference]: Finished difference Result 750 states and 770 transitions. [2019-09-07 09:56:35,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:56:35,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 389 [2019-09-07 09:56:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:56:35,525 INFO L225 Difference]: With dead ends: 750 [2019-09-07 09:56:35,525 INFO L226 Difference]: Without dead ends: 397 [2019-09-07 09:56:35,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:56:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2019-09-07 09:56:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 396. [2019-09-07 09:56:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-09-07 09:56:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 406 transitions. [2019-09-07 09:56:35,539 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 406 transitions. Word has length 389 [2019-09-07 09:56:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:56:35,540 INFO L475 AbstractCegarLoop]: Abstraction has 396 states and 406 transitions. [2019-09-07 09:56:35,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:56:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 406 transitions. [2019-09-07 09:56:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2019-09-07 09:56:35,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:56:35,543 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:56:35,543 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:56:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:56:35,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1055170142, now seen corresponding path program 23 times [2019-09-07 09:56:35,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:56:35,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:56:35,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:35,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:56:35,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:56:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2019-09-07 09:56:35,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:56:35,975 INFO L223 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 [2019-09-07 09:56:35,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1