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/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:22,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:22,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:22,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:22,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:22,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:22,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:22,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:22,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:22,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:22,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:22,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:22,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:22,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:22,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:22,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:22,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:22,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:22,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:22,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:22,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:22,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:22,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:22,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:22,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:22,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:22,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:22,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:22,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:22,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:22,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:22,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:22,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:22,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:22,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:22,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:22,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:16:22,289 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:22,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:22,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:22,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:22,293 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:22,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:22,293 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:22,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:22,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:22,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:22,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:22,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:22,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:22,295 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:22,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:22,295 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:22,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:22,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:22,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:22,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:22,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:22,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:22,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:22,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:22,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:22,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:22,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:22,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:22,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:22,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:22,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:22,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:22,580 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:22,580 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:22,581 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-10-14 23:16:22,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ba9be/c83a51a60d3146c5a5efa2ab450f9945/FLAGf91dae16c [2019-10-14 23:16:23,095 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:23,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-10-14 23:16:23,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ba9be/c83a51a60d3146c5a5efa2ab450f9945/FLAGf91dae16c [2019-10-14 23:16:23,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ba9be/c83a51a60d3146c5a5efa2ab450f9945 [2019-10-14 23:16:23,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:23,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:23,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:23,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:23,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:23,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6063a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23, skipping insertion in model container [2019-10-14 23:16:23,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,524 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:23,542 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:23,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:23,774 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:23,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:23,811 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:23,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23 WrapperNode [2019-10-14 23:16:23,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:23,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:23,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:23,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:23,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... [2019-10-14 23:16:23,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:23,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:23,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:23,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:23,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:23,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:23,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:23,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:23,993 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-14 23:16:23,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:16:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-14 23:16:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:16:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:24,299 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:24,300 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:24,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:24 BoogieIcfgContainer [2019-10-14 23:16:24,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:24,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:24,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:24,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:24,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:23" (1/3) ... [2019-10-14 23:16:24,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a5f23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:24, skipping insertion in model container [2019-10-14 23:16:24,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:23" (2/3) ... [2019-10-14 23:16:24,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a5f23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:24, skipping insertion in model container [2019-10-14 23:16:24,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:24" (3/3) ... [2019-10-14 23:16:24,310 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-10-14 23:16:24,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:24,329 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:24,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:24,368 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:24,368 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:24,368 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:24,369 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:24,369 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:24,369 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:24,369 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:24,369 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 23:16:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:24,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,404 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,409 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2019-10-14 23:16:24,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979181244] [2019-10-14 23:16:24,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:24,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979181244] [2019-10-14 23:16:24,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:24,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:24,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355081861] [2019-10-14 23:16:24,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:24,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:24,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:24,677 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 23:16:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,765 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-10-14 23:16:24,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:24,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:16:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,775 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:24,776 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:16:24,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:16:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:16:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:16:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-14 23:16:24,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-10-14 23:16:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,821 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-14 23:16:24,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-14 23:16:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:24,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,823 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,824 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash -202652409, now seen corresponding path program 1 times [2019-10-14 23:16:24,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712926912] [2019-10-14 23:16:24,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712926912] [2019-10-14 23:16:25,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:25,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:16:25,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120562763] [2019-10-14 23:16:25,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:25,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:25,075 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2019-10-14 23:16:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:25,275 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-14 23:16:25,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:25,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 23:16:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:25,276 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:16:25,277 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:16:25,278 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:16:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:16:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:16:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 23:16:25,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2019-10-14 23:16:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:25,285 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 23:16:25,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 23:16:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:25,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:25,287 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:25,287 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2019-10-14 23:16:25,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:25,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252285611] [2019-10-14 23:16:25,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252285611] [2019-10-14 23:16:25,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:25,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:16:25,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414807302] [2019-10-14 23:16:25,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:25,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:25,631 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-10-14 23:16:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:25,826 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-10-14 23:16:25,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:25,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 23:16:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:25,828 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:25,828 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:16:25,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:16:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 23:16:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:16:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 23:16:25,836 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2019-10-14 23:16:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:25,837 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 23:16:25,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 23:16:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:25,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:25,838 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:25,839 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2019-10-14 23:16:25,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:25,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918570051] [2019-10-14 23:16:25,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918570051] [2019-10-14 23:16:25,990 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:25,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:16:25,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716276676] [2019-10-14 23:16:25,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:25,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:25,992 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 23:16:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:26,159 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 23:16:26,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:26,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-14 23:16:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:26,160 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:26,161 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:26,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:16:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:16:26,167 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2019-10-14 23:16:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:26,168 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:16:26,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:16:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:26,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:26,169 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:26,169 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash -255201960, now seen corresponding path program 1 times [2019-10-14 23:16:26,170 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:26,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177396806] [2019-10-14 23:16:26,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:26,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177396806] [2019-10-14 23:16:26,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318887097] [2019-10-14 23:16:26,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:26,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:26,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:26,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:16:26,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838742359] [2019-10-14 23:16:26,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:26,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:26,498 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2019-10-14 23:16:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:26,695 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-14 23:16:26,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:26,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-10-14 23:16:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:26,699 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:26,699 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:26,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-10-14 23:16:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-14 23:16:26,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2019-10-14 23:16:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:26,715 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-14 23:16:26,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-14 23:16:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:26,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:26,717 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:26,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:26,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2963478, now seen corresponding path program 1 times [2019-10-14 23:16:26,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:26,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3152918] [2019-10-14 23:16:26,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:27,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3152918] [2019-10-14 23:16:27,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170497949] [2019-10-14 23:16:27,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:16:27,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:27,683 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:27,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2019-10-14 23:16:27,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388646475] [2019-10-14 23:16:27,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:27,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:27,686 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 16 states. [2019-10-14 23:16:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:28,666 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-10-14 23:16:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:16:28,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-10-14 23:16:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:28,669 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:28,669 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:28,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-10-14 23:16:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:16:28,679 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-10-14 23:16:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:28,679 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:16:28,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:16:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:28,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:28,680 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:28,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:28,889 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 1 times [2019-10-14 23:16:28,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:28,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348589906] [2019-10-14 23:16:28,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,164 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 27 [2019-10-14 23:16:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348589906] [2019-10-14 23:16:30,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904846136] [2019-10-14 23:16:30,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:16:30,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:38,150 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2019-10-14 23:16:38,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:38,166 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:38,168 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-10-14 23:16:38,168 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:38,244 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-10-14 23:16:38,244 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-14 23:16:38,244 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-14 23:16:38,245 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-14 23:16:38,245 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:16:38,246 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-10-14 23:16:41,174 WARN L191 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 45 [2019-10-14 23:16:42,591 WARN L191 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-10-14 23:16:42,995 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-10-14 23:16:42,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:42,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:43,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:43,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:43,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:46,882 WARN L191 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-10-14 23:16:47,472 WARN L191 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-10-14 23:16:47,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:48,173 WARN L191 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-10-14 23:16:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:48,300 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:48,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2019-10-14 23:16:48,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094970742] [2019-10-14 23:16:48,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:16:48,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:16:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=607, Unknown=4, NotChecked=0, Total=702 [2019-10-14 23:16:48,302 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 27 states. [2019-10-14 23:16:49,130 WARN L191 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-10-14 23:16:50,091 WARN L191 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-14 23:16:51,503 WARN L191 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-10-14 23:16:52,057 WARN L191 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-14 23:16:52,217 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-14 23:16:55,529 WARN L191 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2019-10-14 23:16:55,952 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-10-14 23:16:57,610 WARN L191 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2019-10-14 23:17:00,794 WARN L191 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-10-14 23:17:01,298 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-10-14 23:17:02,448 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-10-14 23:17:03,323 WARN L191 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-10-14 23:17:03,676 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-10-14 23:17:03,868 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-14 23:17:04,259 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2019-10-14 23:17:06,498 WARN L191 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 79 [2019-10-14 23:17:06,841 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-10-14 23:17:08,511 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2019-10-14 23:17:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:08,698 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 23:17:08,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:17:08,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2019-10-14 23:17:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:08,700 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:17:08,701 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:17:08,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=381, Invalid=1871, Unknown=4, NotChecked=0, Total=2256 [2019-10-14 23:17:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:17:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2019-10-14 23:17:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:17:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:17:08,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-10-14 23:17:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:08,710 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:17:08,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:17:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:17:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:17:08,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:08,711 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:08,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:08,913 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash -330785168, now seen corresponding path program 2 times [2019-10-14 23:17:08,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:08,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341565451] [2019-10-14 23:17:08,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:09,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341565451] [2019-10-14 23:17:09,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157970861] [2019-10-14 23:17:09,057 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:09,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:17:09,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:09,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:17:09,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:09,267 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:09,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-10-14 23:17:09,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117977252] [2019-10-14 23:17:09,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:17:09,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:17:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:09,269 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 13 states. [2019-10-14 23:17:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:10,309 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-10-14 23:17:10,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:17:10,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-14 23:17:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:10,311 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:17:10,311 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:17:10,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:17:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:17:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2019-10-14 23:17:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:17:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 23:17:10,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-10-14 23:17:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:10,320 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 23:17:10,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:17:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 23:17:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:17:10,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:10,321 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:10,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:10,525 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 2 times [2019-10-14 23:17:10,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:10,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36428774] [2019-10-14 23:17:10,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,942 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 30 [2019-10-14 23:17:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat