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/loops-crafted-1/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:12:23,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:12:23,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:12:23,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 03:12:23,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:12:23,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:12:23,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:12:23,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:12:23,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:12:23,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:12:23,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:12:23,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:12:23,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:12:23,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:12:23,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:12:23,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:12:23,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 03:12:23,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:12:23,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:12:23,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:12:23,306 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 [2019-09-08 03:12:23,320 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:12:23,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:12:23,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:12:23,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:12:23,322 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:12:23,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:12:23,323 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:12:23,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:12:23,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:12:23,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:12:23,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:12:23,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:12:23,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:12:23,324 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:12:23,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:12:23,325 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:12:23,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:12:23,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:12:23,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:12:23,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:12:23,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:12:23,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:12:23,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:12:23,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:12:23,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:12:23,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:12:23,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:12:23,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:12:23,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:12:23,355 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:12:23,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:12:23,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:12:23,373 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:12:23,373 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:12:23,374 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2019-09-08 03:12:23,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6d35034/15d758bb91974b6d9333fddf27855090/FLAG186903ac0 [2019-09-08 03:12:23,832 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:12:23,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2019-09-08 03:12:23,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6d35034/15d758bb91974b6d9333fddf27855090/FLAG186903ac0 [2019-09-08 03:12:24,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6d35034/15d758bb91974b6d9333fddf27855090 [2019-09-08 03:12:24,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:12:24,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:12:24,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:12:24,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:12:24,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:12:24,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d26225c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24, skipping insertion in model container [2019-09-08 03:12:24,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,281 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:12:24,297 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:12:24,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:12:24,504 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:12:24,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:12:24,538 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:12:24,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24 WrapperNode [2019-09-08 03:12:24,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:12:24,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:12:24,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:12:24,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:12:24,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (1/1) ... [2019-09-08 03:12:24,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:12:24,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:12:24,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:12:24,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:12:24,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (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 [2019-09-08 03:12:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:12:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:12:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 03:12:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:12:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:12:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:12:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:12:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:12:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:12:24,870 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:12:24,873 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 03:12:24,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:12:24 BoogieIcfgContainer [2019-09-08 03:12:24,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:12:24,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:12:24,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:12:24,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:12:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:12:24" (1/3) ... [2019-09-08 03:12:24,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f6d2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:12:24, skipping insertion in model container [2019-09-08 03:12:24,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:12:24" (2/3) ... [2019-09-08 03:12:24,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f6d2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:12:24, skipping insertion in model container [2019-09-08 03:12:24,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:12:24" (3/3) ... [2019-09-08 03:12:24,887 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2019-09-08 03:12:24,897 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:12:24,916 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:12:24,939 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:12:24,969 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:12:24,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:12:24,970 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:12:24,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:12:24,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:12:24,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:12:24,971 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:12:24,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:12:24,971 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:12:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-08 03:12:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:12:24,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:24,992 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:24,994 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2019-09-08 03:12:25,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:25,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:25,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:25,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:12:25,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 03:12:25,102 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 03:12:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 03:12:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:12:25,114 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-08 03:12:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:25,135 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-08 03:12:25,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 03:12:25,136 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-08 03:12:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:25,144 INFO L225 Difference]: With dead ends: 30 [2019-09-08 03:12:25,144 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 03:12:25,148 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 [2019-09-08 03:12:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 03:12:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 03:12:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 03:12:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-08 03:12:25,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-08 03:12:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:25,181 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-08 03:12:25,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 03:12:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-08 03:12:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:12:25,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:25,182 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:25,183 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-09-08 03:12:25,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:25,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:25,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:25,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:12:25,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:12:25,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:12:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:12:25,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:12:25,301 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-08 03:12:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:25,335 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-08 03:12:25,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:12:25,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-08 03:12:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:25,336 INFO L225 Difference]: With dead ends: 24 [2019-09-08 03:12:25,337 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:12:25,338 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 [2019-09-08 03:12:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:12:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-08 03:12:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-08 03:12:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-08 03:12:25,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-08 03:12:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:25,344 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-08 03:12:25,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:12:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-08 03:12:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:12:25,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:25,346 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:25,346 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2019-09-08 03:12:25,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:25,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:25,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:25,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:25,469 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 [2019-09-08 03:12:25,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:25,510 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:12:25,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:25,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-08 03:12:25,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 03:12:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 03:12:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:12:25,603 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-08 03:12:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:25,677 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-08 03:12:25,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:12:25,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-08 03:12:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:25,679 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:12:25,679 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:12:25,680 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:12:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:12:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-08 03:12:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 03:12:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 03:12:25,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 03:12:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:25,686 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 03:12:25,686 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 03:12:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 03:12:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 03:12:25,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:25,687 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:25,687 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash 127284375, now seen corresponding path program 2 times [2019-09-08 03:12:25,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:25,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:25,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:25,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:25,786 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) [2019-09-08 03:12:25,802 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 [2019-09-08 03:12:25,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:12:25,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:25,816 WARN L254 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:12:25,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:25,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:25,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-09-08 03:12:25,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:12:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:12:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:12:25,900 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-09-08 03:12:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:25,985 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-08 03:12:25,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 03:12:25,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-08 03:12:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:25,987 INFO L225 Difference]: With dead ends: 30 [2019-09-08 03:12:25,987 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 03:12:25,988 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:12:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 03:12:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-08 03:12:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 03:12:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 03:12:25,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-08 03:12:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:25,994 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 03:12:25,994 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:12:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 03:12:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 03:12:25,995 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:25,995 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:25,995 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2057483924, now seen corresponding path program 3 times [2019-09-08 03:12:25,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:25,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:25,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:25,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:25,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:26,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:26,115 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:26,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:12:26,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-08 03:12:26,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:26,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-08 03:12:26,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:12:26,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:26,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-09-08 03:12:26,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:12:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:12:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:12:26,198 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-09-08 03:12:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:26,346 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-09-08 03:12:26,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:12:26,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-09-08 03:12:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:26,348 INFO L225 Difference]: With dead ends: 40 [2019-09-08 03:12:26,348 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 03:12:26,348 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:12:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 03:12:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-09-08 03:12:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 03:12:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-08 03:12:26,354 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2019-09-08 03:12:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:26,355 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-08 03:12:26,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:12:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-08 03:12:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:12:26,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:26,356 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:26,356 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 796117209, now seen corresponding path program 1 times [2019-09-08 03:12:26,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:26,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:26,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:26,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:26,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:26,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:26,521 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:26,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:26,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 03:12:26,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:26,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:26,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-08 03:12:26,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 03:12:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 03:12:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:12:26,618 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2019-09-08 03:12:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:26,751 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-09-08 03:12:26,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 03:12:26,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-09-08 03:12:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:26,752 INFO L225 Difference]: With dead ends: 43 [2019-09-08 03:12:26,752 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 03:12:26,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:12:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 03:12:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-08 03:12:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 03:12:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-08 03:12:26,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2019-09-08 03:12:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:26,766 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-08 03:12:26,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 03:12:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-08 03:12:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 03:12:26,771 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:26,771 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:26,771 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash 776222550, now seen corresponding path program 2 times [2019-09-08 03:12:26,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:26,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:26,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:26,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:26,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:26,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:26,952 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:26,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:12:26,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:12:26,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:26,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 03:12:26,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:27,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:27,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 03:12:27,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:12:27,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:12:27,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:12:27,052 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2019-09-08 03:12:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:27,262 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-09-08 03:12:27,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:12:27,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-09-08 03:12:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:27,264 INFO L225 Difference]: With dead ends: 49 [2019-09-08 03:12:27,264 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 03:12:27,265 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:12:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 03:12:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-08 03:12:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 03:12:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-09-08 03:12:27,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2019-09-08 03:12:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:27,277 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-09-08 03:12:27,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:12:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-09-08 03:12:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:12:27,282 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:27,282 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:27,282 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:27,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1805731722, now seen corresponding path program 3 times [2019-09-08 03:12:27,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:27,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:27,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:27,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:27,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:27,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:27,553 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 [2019-09-08 03:12:27,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:12:27,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 03:12:27,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:27,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 03:12:27,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 03:12:27,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:27,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2019-09-08 03:12:27,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:12:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:12:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:12:27,660 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2019-09-08 03:12:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:28,059 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-08 03:12:28,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:12:28,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-08 03:12:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:28,061 INFO L225 Difference]: With dead ends: 63 [2019-09-08 03:12:28,061 INFO L226 Difference]: Without dead ends: 53 [2019-09-08 03:12:28,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:12:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-08 03:12:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-09-08 03:12:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 03:12:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-09-08 03:12:28,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2019-09-08 03:12:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:28,069 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-09-08 03:12:28,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:12:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-09-08 03:12:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 03:12:28,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:28,071 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:28,071 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1626205111, now seen corresponding path program 4 times [2019-09-08 03:12:28,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:28,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:28,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:28,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:28,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:12:28,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:28,328 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) [2019-09-08 03:12:28,341 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:28,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:12:28,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:28,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 03:12:28,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:12:28,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:28,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-08 03:12:28,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:12:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:12:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:12:28,428 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 14 states. [2019-09-08 03:12:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:28,695 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2019-09-08 03:12:28,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:12:28,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-09-08 03:12:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:28,697 INFO L225 Difference]: With dead ends: 64 [2019-09-08 03:12:28,697 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 03:12:28,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:12:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 03:12:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-08 03:12:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-08 03:12:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-09-08 03:12:28,705 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2019-09-08 03:12:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:28,706 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-09-08 03:12:28,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:12:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-09-08 03:12:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 03:12:28,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:28,707 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:28,708 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:28,708 INFO L82 PathProgramCache]: Analyzing trace with hash -303000332, now seen corresponding path program 5 times [2019-09-08 03:12:28,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:28,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:28,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:28,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:28,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:12:28,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:28,938 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:28,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:13:47,915 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-08 03:13:47,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:49,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 03:13:49,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:13:50,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:50,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-08 03:13:50,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:13:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:13:50,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:13:50,046 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2019-09-08 03:13:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:50,353 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-09-08 03:13:50,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 03:13:50,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2019-09-08 03:13:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:50,354 INFO L225 Difference]: With dead ends: 67 [2019-09-08 03:13:50,354 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 03:13:50,355 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:13:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 03:13:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-09-08 03:13:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-08 03:13:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-09-08 03:13:50,365 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2019-09-08 03:13:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:50,367 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-09-08 03:13:50,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:13:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-09-08 03:13:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 03:13:50,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:50,370 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:50,370 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1990002327, now seen corresponding path program 6 times [2019-09-08 03:13:50,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:50,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:50,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:50,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:50,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:13:50,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:13:50,641 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:13:50,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:13:50,684 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-08 03:13:50,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:50,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 03:13:50,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 7 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-08 03:13:50,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:50,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-09-08 03:13:50,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:13:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:13:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:13:50,778 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 19 states. [2019-09-08 03:13:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:52,082 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2019-09-08 03:13:52,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:13:52,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2019-09-08 03:13:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:52,086 INFO L225 Difference]: With dead ends: 84 [2019-09-08 03:13:52,086 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 03:13:52,087 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:13:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 03:13:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-09-08 03:13:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-08 03:13:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-09-08 03:13:52,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-09-08 03:13:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:52,095 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-09-08 03:13:52,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:13:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-09-08 03:13:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 03:13:52,096 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:52,096 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:52,096 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1141914678, now seen corresponding path program 7 times [2019-09-08 03:13:52,097 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:52,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:52,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 301 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:13:52,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:13:52,352 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 [2019-09-08 03:13:52,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:13:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:52,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 03:13:52,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 301 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:13:52,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:52,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-08 03:13:52,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:13:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:13:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:13:52,469 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 18 states. [2019-09-08 03:13:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:52,978 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2019-09-08 03:13:52,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:13:52,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-09-08 03:13:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:52,982 INFO L225 Difference]: With dead ends: 82 [2019-09-08 03:13:52,983 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 03:13:52,983 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:13:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 03:13:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-09-08 03:13:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 03:13:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-09-08 03:13:52,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2019-09-08 03:13:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:52,991 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-09-08 03:13:52,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:13:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-09-08 03:13:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 03:13:52,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:52,993 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:52,993 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -569880231, now seen corresponding path program 8 times [2019-09-08 03:13:52,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:52,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:52,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:52,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:13:52,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 125 proven. 345 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:13:53,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:13:53,291 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:13:53,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:13:53,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:13:53,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:53,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:13:53,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:53,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:53,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 22 [2019-09-08 03:13:53,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:13:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:13:53,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:13:53,464 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 22 states. [2019-09-08 03:13:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:54,097 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2019-09-08 03:13:54,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 03:13:54,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2019-09-08 03:13:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:54,099 INFO L225 Difference]: With dead ends: 94 [2019-09-08 03:13:54,099 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 03:13:54,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:13:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 03:13:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-09-08 03:13:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:13:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-09-08 03:13:54,122 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2019-09-08 03:13:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:54,123 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-09-08 03:13:54,123 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:13:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-09-08 03:13:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 03:13:54,124 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:54,124 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:54,125 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 331280153, now seen corresponding path program 9 times [2019-09-08 03:13:54,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:54,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:54,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:54,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:54,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 157 proven. 551 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:13:54,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:13:54,490 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) [2019-09-08 03:13:54,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:13:54,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-08 03:13:54,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:54,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 03:13:54,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 205 proven. 15 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-08 03:13:54,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:54,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-09-08 03:13:54,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:13:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:13:54,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:13:54,737 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 27 states. [2019-09-08 03:14:09,016 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2019-09-08 03:14:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:12,250 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2019-09-08 03:14:12,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:14:12,250 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2019-09-08 03:14:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:12,252 INFO L225 Difference]: With dead ends: 114 [2019-09-08 03:14:12,252 INFO L226 Difference]: Without dead ends: 98 [2019-09-08 03:14:12,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=397, Invalid=934, Unknown=1, NotChecked=0, Total=1332 [2019-09-08 03:14:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-08 03:14:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2019-09-08 03:14:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-08 03:14:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-09-08 03:14:12,262 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2019-09-08 03:14:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:12,262 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-09-08 03:14:12,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:14:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-09-08 03:14:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 03:14:12,263 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:12,263 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 21, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:12,264 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash 771165300, now seen corresponding path program 10 times [2019-09-08 03:14:12,264 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:12,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:12,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:12,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:12,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 03:14:12,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:14:12,710 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:14:12,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:14:12,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:14:12,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:12,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjunts are in the unsatisfiable core [2019-09-08 03:14:12,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:14:12,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:14:12,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-08 03:14:12,841 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 03:14:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 03:14:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:14:12,844 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 25 states. [2019-09-08 03:14:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:13,741 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2019-09-08 03:14:13,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:14:13,742 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2019-09-08 03:14:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:13,742 INFO L225 Difference]: With dead ends: 109 [2019-09-08 03:14:13,743 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 03:14:13,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:14:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 03:14:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-09-08 03:14:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-08 03:14:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-08 03:14:13,752 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 85 [2019-09-08 03:14:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:13,752 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-08 03:14:13,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 03:14:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-08 03:14:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-08 03:14:13,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:13,754 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:13,754 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1759160471, now seen corresponding path program 11 times [2019-09-08 03:14:13,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:13,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:13,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:13,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:13,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 249 proven. 737 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 03:14:14,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:14:14,355 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) [2019-09-08 03:14:14,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:20:47,015 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-09-08 03:20:47,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:20:47,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-08 03:20:47,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:20:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:20:47,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:20:47,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 29 [2019-09-08 03:20:47,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 03:20:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 03:20:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:20:47,758 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 29 states. [2019-09-08 03:20:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:20:49,123 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2019-09-08 03:20:49,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 03:20:49,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2019-09-08 03:20:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:20:49,125 INFO L225 Difference]: With dead ends: 121 [2019-09-08 03:20:49,125 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 03:20:49,126 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:20:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 03:20:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-09-08 03:20:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-08 03:20:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-08 03:20:49,134 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 88 [2019-09-08 03:20:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:20:49,134 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-08 03:20:49,134 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 03:20:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-08 03:20:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 03:20:49,135 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:20:49,135 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:20:49,136 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:20:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:20:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 537134679, now seen corresponding path program 12 times [2019-09-08 03:20:49,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:20:49,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:20:49,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:49,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:20:49,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:20:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 293 proven. 1027 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 03:20:49,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:20:49,725 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 [2019-09-08 03:20:49,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:20:52,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-08 03:20:52,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:20:52,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 03:20:52,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:20:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 359 proven. 26 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-09-08 03:20:53,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:20:53,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 35 [2019-09-08 03:20:53,019 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:20:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:20:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:20:53,020 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 35 states. [2019-09-08 03:20:55,400 WARN L188 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 10 [2019-09-08 03:20:56,013 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-08 03:21:00,179 WARN L188 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-09-08 03:21:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:16,838 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2019-09-08 03:21:16,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:21:16,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2019-09-08 03:21:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:16,840 INFO L225 Difference]: With dead ends: 145 [2019-09-08 03:21:16,841 INFO L226 Difference]: Without dead ends: 126 [2019-09-08 03:21:16,843 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=645, Invalid=1607, Unknown=4, NotChecked=0, Total=2256 [2019-09-08 03:21:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-08 03:21:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 110. [2019-09-08 03:21:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-08 03:21:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2019-09-08 03:21:16,852 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 100 [2019-09-08 03:21:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:16,852 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2019-09-08 03:21:16,852 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:21:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2019-09-08 03:21:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 03:21:16,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:16,854 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 28, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:16,854 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1966695542, now seen corresponding path program 13 times [2019-09-08 03:21:16,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:16,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:16,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:16,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:21:16,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 401 proven. 1190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 03:21:17,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:17,459 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 [2019-09-08 03:21:17,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:21:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:17,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-08 03:21:17,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 401 proven. 1190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 03:21:17,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:17,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-08 03:21:17,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 03:21:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 03:21:17,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:21:17,650 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 32 states. [2019-09-08 03:21:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:19,362 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2019-09-08 03:21:19,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 03:21:19,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 109 [2019-09-08 03:21:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:19,364 INFO L225 Difference]: With dead ends: 136 [2019-09-08 03:21:19,364 INFO L226 Difference]: Without dead ends: 114 [2019-09-08 03:21:19,365 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:21:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-08 03:21:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-09-08 03:21:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-08 03:21:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2019-09-08 03:21:19,370 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 109 [2019-09-08 03:21:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:19,370 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2019-09-08 03:21:19,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 03:21:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2019-09-08 03:21:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-08 03:21:19,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:19,371 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 29, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:19,371 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2023983001, now seen corresponding path program 14 times [2019-09-08 03:21:19,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:19,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:19,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:19,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:21:19,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 415 proven. 1276 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 03:21:20,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:20,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:21:20,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:21:20,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:21:20,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:21:20,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 03:21:20,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:21:20,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:20,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37] total 38 [2019-09-08 03:21:20,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 03:21:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 03:21:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:21:20,322 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 38 states. [2019-09-08 03:21:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:22,797 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2019-09-08 03:21:22,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-08 03:21:22,798 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2019-09-08 03:21:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:22,799 INFO L225 Difference]: With dead ends: 154 [2019-09-08 03:21:22,799 INFO L226 Difference]: Without dead ends: 132 [2019-09-08 03:21:22,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:21:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-08 03:21:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-09-08 03:21:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-08 03:21:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2019-09-08 03:21:22,807 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 112 [2019-09-08 03:21:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:22,808 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2019-09-08 03:21:22,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 03:21:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2019-09-08 03:21:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-08 03:21:22,809 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:22,809 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 35, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:22,809 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:22,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1624295367, now seen corresponding path program 15 times [2019-09-08 03:21:22,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:22,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:22,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:21:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 499 proven. 1855 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 03:21:23,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:23,648 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:21:23,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:21:23,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 03:21:23,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:21:23,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 03:21:23,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2019-09-08 03:21:24,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:24,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 9] total 45 [2019-09-08 03:21:24,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:21:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:21:24,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:21:24,066 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 45 states. [2019-09-08 03:21:28,508 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967295) 4294967296) 500000) (< (mod c_main_~x~0 4294967296) 500000) (< (mod (+ c_main_~x~0 4294967294) 4294967296) 500000) (< (mod (+ c_main_~x~0 4294967291) 4294967296) 500000) (< (mod (+ c_main_~x~0 4294967292) 4294967296) 500000) (< (mod (+ c_main_~x~0 4294967293) 4294967296) 500000) (< (mod (+ c_main_~x~0 4294967290) 4294967296) 500000)) is different from false [2019-09-08 03:21:32,530 WARN L188 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-08 03:21:41,477 WARN L188 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 26 DAG size of output: 10 [2019-09-08 03:21:51,864 WARN L188 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-09-08 03:22:04,010 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-08 03:22:17,778 WARN L188 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-09-08 03:22:23,574 WARN L188 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-09-08 03:22:28,768 WARN L188 SmtUtils]: Spent 4.45 s on a formula simplification that was a NOOP. DAG size: 20 [2019-09-08 03:22:30,569 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-09-08 03:22:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:22:30,571 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2019-09-08 03:22:30,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-08 03:22:30,571 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2019-09-08 03:22:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:22:30,573 INFO L225 Difference]: With dead ends: 180 [2019-09-08 03:22:30,573 INFO L226 Difference]: Without dead ends: 158 [2019-09-08 03:22:30,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=1007, Invalid=2652, Unknown=5, NotChecked=118, Total=3782 [2019-09-08 03:22:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-08 03:22:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2019-09-08 03:22:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-08 03:22:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2019-09-08 03:22:30,581 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 130 [2019-09-08 03:22:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:22:30,581 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2019-09-08 03:22:30,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:22:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2019-09-08 03:22:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 03:22:30,583 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:22:30,583 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 36, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:22:30,583 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:22:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:22:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 241735767, now seen corresponding path program 16 times [2019-09-08 03:22:30,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:22:30,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:22:30,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:30,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:22:30,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:22:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 623 proven. 1962 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 03:22:31,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:22:31,628 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:22:31,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:22:31,744 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:22:31,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:22:31,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-08 03:22:31,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:22:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:22:32,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:22:32,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 44] total 45 [2019-09-08 03:22:32,422 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:22:32,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:22:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:22:32,424 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand 45 states. [2019-09-08 03:22:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:22:36,141 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2019-09-08 03:22:36,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:22:36,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 136 [2019-09-08 03:22:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:22:36,143 INFO L225 Difference]: With dead ends: 181 [2019-09-08 03:22:36,143 INFO L226 Difference]: Without dead ends: 156 [2019-09-08 03:22:36,144 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:22:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-08 03:22:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2019-09-08 03:22:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-09-08 03:22:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2019-09-08 03:22:36,153 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 136 [2019-09-08 03:22:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:22:36,153 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2019-09-08 03:22:36,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:22:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2019-09-08 03:22:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-08 03:22:36,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:22:36,155 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 42, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:22:36,155 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:22:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:22:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash -686528265, now seen corresponding path program 17 times [2019-09-08 03:22:36,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:22:36,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:22:36,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:36,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:22:36,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:22:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 725 proven. 2667 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 03:22:37,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:22:37,346 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:22:37,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1