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/reducercommutativity/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:43:10,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:43:10,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:43:10,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:43:10,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:43:10,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:43:10,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:43:10,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:43:10,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:43:10,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:43:10,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:43:10,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:43:10,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:43:10,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:43:10,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:43:10,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:43:10,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:43:10,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:43:10,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:43:10,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:43:10,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:43:10,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:43:10,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:43:10,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:43:10,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:43:10,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:43:10,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:43:10,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:43:10,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:43:10,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:43:10,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:43:10,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:43:10,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:43:10,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:43:10,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:43:10,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:43:10,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:43:10,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:43:10,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:43:10,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:43:10,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:43:10,296 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 [2019-10-13 19:43:10,313 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:43:10,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:43:10,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:43:10,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:43:10,316 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:43:10,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:43:10,316 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:43:10,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:43:10,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:43:10,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:43:10,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:43:10,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:43:10,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:43:10,317 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:43:10,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:43:10,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:43:10,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:43:10,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:43:10,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:43:10,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:43:10,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:43:10,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:43:10,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:43:10,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:43:10,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:43:10,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:43:10,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:43:10,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:43:10,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:43:10,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:43:10,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:43:10,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:43:10,630 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:43:10,631 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:43:10,631 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-10-13 19:43:10,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72d5931d/8d9958a4cba7467da314ef9d8fd47c62/FLAG7024471d8 [2019-10-13 19:43:11,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:43:11,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-10-13 19:43:11,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72d5931d/8d9958a4cba7467da314ef9d8fd47c62/FLAG7024471d8 [2019-10-13 19:43:11,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72d5931d/8d9958a4cba7467da314ef9d8fd47c62 [2019-10-13 19:43:11,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:43:11,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:43:11,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:43:11,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:43:11,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:43:11,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:11,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ebafe9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11, skipping insertion in model container [2019-10-13 19:43:11,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:11,650 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:43:11,673 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:43:11,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:43:11,950 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:43:11,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:43:11,995 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:43:11,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11 WrapperNode [2019-10-13 19:43:11,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:43:11,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:43:11,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:43:11,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:43:12,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... [2019-10-13 19:43:12,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:43:12,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:43:12,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:43:12,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:43:12,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:43:12,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:43:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:43:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-10-13 19:43:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:43:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:43:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:43:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:43:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:43:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:43:12,495 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:43:12,495 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 19:43:12,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:12 BoogieIcfgContainer [2019-10-13 19:43:12,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:43:12,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:43:12,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:43:12,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:43:12,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:11" (1/3) ... [2019-10-13 19:43:12,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3ac017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:12, skipping insertion in model container [2019-10-13 19:43:12,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:11" (2/3) ... [2019-10-13 19:43:12,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3ac017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:12, skipping insertion in model container [2019-10-13 19:43:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:12" (3/3) ... [2019-10-13 19:43:12,505 INFO L109 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2019-10-13 19:43:12,516 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:43:12,524 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:43:12,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:43:12,558 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:43:12,558 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:43:12,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:43:12,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:43:12,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:43:12,559 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:43:12,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:43:12,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:43:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 19:43:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:43:12,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:12,583 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:12,585 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-13 19:43:12,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:12,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177894195] [2019-10-13 19:43:12,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:12,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:12,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:43:12,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177894195] [2019-10-13 19:43:12,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:12,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:43:12,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68344091] [2019-10-13 19:43:12,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:12,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:43:12,909 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 19:43:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:13,051 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-13 19:43:13,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:13,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 19:43:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:13,065 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:43:13,066 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:43:13,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:43:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:43:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 19:43:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:43:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 19:43:13,116 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-13 19:43:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:13,116 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 19:43:13,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 19:43:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:43:13,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:13,119 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:13,120 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-13 19:43:13,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:13,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563761145] [2019-10-13 19:43:13,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:43:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563761145] [2019-10-13 19:43:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571906780] [2019-10-13 19:43:13,229 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 [2019-10-13 19:43:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:43:13,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:43:13,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:13,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 19:43:13,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579479933] [2019-10-13 19:43:13,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:13,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:13,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:13,369 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-13 19:43:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:13,384 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 19:43:13,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:13,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 19:43:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:13,386 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:43:13,386 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:43:13,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:43:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 19:43:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:43:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 19:43:13,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-13 19:43:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:13,395 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 19:43:13,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 19:43:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:43:13,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:13,397 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:13,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:13,610 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-13 19:43:13,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:13,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957547786] [2019-10-13 19:43:13,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:43:13,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957547786] [2019-10-13 19:43:13,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50146758] [2019-10-13 19:43:13,752 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 [2019-10-13 19:43:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:13,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:43:13,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:43:13,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:13,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 19:43:13,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646710856] [2019-10-13 19:43:13,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:13,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:13,846 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-13 19:43:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:13,869 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 19:43:13,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:13,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 19:43:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:13,873 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:43:13,873 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:43:13,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:43:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 19:43:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:43:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 19:43:13,892 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-13 19:43:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:13,892 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 19:43:13,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 19:43:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:43:13,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:13,898 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:14,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:14,099 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-13 19:43:14,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:14,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598163461] [2019-10-13 19:43:14,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:14,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:14,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 19:43:14,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598163461] [2019-10-13 19:43:14,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774206454] [2019-10-13 19:43:14,247 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 [2019-10-13 19:43:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:43:14,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 19:43:14,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:14,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 19:43:14,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058645060] [2019-10-13 19:43:14,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:14,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:14,337 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-13 19:43:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:14,353 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-13 19:43:14,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:14,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-13 19:43:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:14,355 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:43:14,355 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:43:14,356 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:43:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 19:43:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:43:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 19:43:14,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-13 19:43:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:14,364 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 19:43:14,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 19:43:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:43:14,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:14,369 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:14,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:14,571 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-13 19:43:14,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:14,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738793620] [2019-10-13 19:43:14,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:14,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:14,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 19:43:14,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738793620] [2019-10-13 19:43:14,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393378762] [2019-10-13 19:43:14,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:43:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:43:14,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 19:43:14,851 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:14,851 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-13 19:43:14,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975583152] [2019-10-13 19:43:14,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:43:14,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:43:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:43:14,853 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-13 19:43:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:14,999 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 19:43:15,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:43:15,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-13 19:43:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:15,001 INFO L225 Difference]: With dead ends: 55 [2019-10-13 19:43:15,001 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:43:15,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:43:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:43:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-13 19:43:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:43:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 19:43:15,012 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-13 19:43:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:15,012 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 19:43:15,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:43:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 19:43:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 19:43:15,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:15,014 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:15,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:15,215 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-13 19:43:15,217 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:15,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-13 19:43:15,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 19:43:15,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-13 19:43:15,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068330309] [2019-10-13 19:43:15,330 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:15,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:15,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:15,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:43:15,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 19:43:15,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:15,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 19:43:15,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166483868] [2019-10-13 19:43:15,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:43:15,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:15,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:43:15,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:15,463 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-13 19:43:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:15,547 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 19:43:15,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:43:15,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 19:43:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:15,548 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:43:15,549 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 19:43:15,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 19:43:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-13 19:43:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:43:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-13 19:43:15,556 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-13 19:43:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:15,557 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-13 19:43:15,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:43:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-13 19:43:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:43:15,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:15,558 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:15,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:15,760 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-13 19:43:15,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:15,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116394973] [2019-10-13 19:43:15,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 19:43:15,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116394973] [2019-10-13 19:43:15,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469126695] [2019-10-13 19:43:15,878 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:15,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:43:15,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:15,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:43:15,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 19:43:15,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:15,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 19:43:15,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843077086] [2019-10-13 19:43:15,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:43:15,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:15,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:43:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:15,984 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-13 19:43:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:16,102 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-13 19:43:16,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:43:16,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-13 19:43:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:16,104 INFO L225 Difference]: With dead ends: 63 [2019-10-13 19:43:16,104 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:43:16,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:43:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 19:43:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:43:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-13 19:43:16,115 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-13 19:43:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:16,121 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-13 19:43:16,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:43:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-13 19:43:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:43:16,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:16,124 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:16,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:16,326 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-13 19:43:16,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:16,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184069005] [2019-10-13 19:43:16,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:16,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:16,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 19:43:16,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184069005] [2019-10-13 19:43:16,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827058335] [2019-10-13 19:43:16,470 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:16,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:43:16,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:16,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:43:16,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 19:43:16,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:16,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 19:43:16,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462428859] [2019-10-13 19:43:16,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:43:16,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:43:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:16,576 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-13 19:43:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:16,681 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 19:43:16,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:43:16,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-13 19:43:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:16,682 INFO L225 Difference]: With dead ends: 66 [2019-10-13 19:43:16,682 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:43:16,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:43:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 19:43:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:43:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 19:43:16,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-13 19:43:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:16,696 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 19:43:16,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:43:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 19:43:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:43:16,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:16,699 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:16,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:16,899 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-13 19:43:16,900 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:16,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717700588] [2019-10-13 19:43:16,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:16,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:16,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 19:43:17,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717700588] [2019-10-13 19:43:17,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611846428] [2019-10-13 19:43:17,020 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:17,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 19:43:17,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:17,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:43:17,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 19:43:17,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:17,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 19:43:17,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948631314] [2019-10-13 19:43:17,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:43:17,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:43:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:43:17,142 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-13 19:43:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:17,314 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 19:43:17,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:43:17,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 19:43:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:17,315 INFO L225 Difference]: With dead ends: 71 [2019-10-13 19:43:17,315 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:43:17,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:43:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:43:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-13 19:43:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:43:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 19:43:17,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-13 19:43:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:17,322 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 19:43:17,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:43:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 19:43:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 19:43:17,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:17,323 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:17,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:17,532 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-13 19:43:17,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:17,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047992630] [2019-10-13 19:43:17,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:17,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:17,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 19:43:17,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047992630] [2019-10-13 19:43:17,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700024235] [2019-10-13 19:43:17,655 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:17,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:43:17,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:17,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:43:17,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 19:43:17,838 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:17,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 19:43:17,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399559571] [2019-10-13 19:43:17,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:43:17,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:43:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:43:17,841 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 19:43:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:18,021 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-13 19:43:18,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:43:18,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 19:43:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:18,022 INFO L225 Difference]: With dead ends: 77 [2019-10-13 19:43:18,022 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 19:43:18,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:43:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 19:43:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-13 19:43:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:43:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-13 19:43:18,034 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-13 19:43:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:18,034 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-13 19:43:18,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:43:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-13 19:43:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 19:43:18,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:18,036 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:18,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:18,243 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-13 19:43:18,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:18,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071244902] [2019-10-13 19:43:18,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:18,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:18,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 19:43:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071244902] [2019-10-13 19:43:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204145713] [2019-10-13 19:43:18,452 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:43:18,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 19:43:18,549 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:18,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 19:43:18,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341476083] [2019-10-13 19:43:18,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:43:18,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:18,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:43:18,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:43:18,552 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-13 19:43:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:18,625 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 19:43:18,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:43:18,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-13 19:43:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:18,627 INFO L225 Difference]: With dead ends: 80 [2019-10-13 19:43:18,627 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 19:43:18,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:43:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 19:43:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 19:43:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 19:43:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 19:43:18,640 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-13 19:43:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:18,641 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 19:43:18,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:43:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 19:43:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 19:43:18,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:18,642 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:18,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:18,843 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-13 19:43:18,844 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:18,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274764324] [2019-10-13 19:43:18,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:18,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:18,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 19:43:18,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274764324] [2019-10-13 19:43:18,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332179416] [2019-10-13 19:43:18,992 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:19,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:19,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:19,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:43:19,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 19:43:19,076 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:19,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 19:43:19,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427016124] [2019-10-13 19:43:19,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:43:19,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:43:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:43:19,077 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-13 19:43:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:19,165 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-13 19:43:19,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:43:19,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-13 19:43:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:19,166 INFO L225 Difference]: With dead ends: 82 [2019-10-13 19:43:19,167 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 19:43:19,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:43:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 19:43:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-13 19:43:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 19:43:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-13 19:43:19,173 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-13 19:43:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:19,173 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-13 19:43:19,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:43:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-13 19:43:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 19:43:19,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:19,175 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:19,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:19,379 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-13 19:43:19,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:19,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785052409] [2019-10-13 19:43:19,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:19,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:19,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 19:43:19,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785052409] [2019-10-13 19:43:19,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84531870] [2019-10-13 19:43:19,518 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:19,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:43:19,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:19,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:43:19,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 19:43:19,634 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:19,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 19:43:19,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757704450] [2019-10-13 19:43:19,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:43:19,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:19,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:43:19,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:43:19,636 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-13 19:43:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:19,811 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-13 19:43:19,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:43:19,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 19:43:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:19,813 INFO L225 Difference]: With dead ends: 87 [2019-10-13 19:43:19,813 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 19:43:19,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:43:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 19:43:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 19:43:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 19:43:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-13 19:43:19,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-13 19:43:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:19,831 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-13 19:43:19,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:43:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-13 19:43:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 19:43:19,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:19,836 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:20,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:20,040 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-13 19:43:20,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:20,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691252864] [2019-10-13 19:43:20,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:20,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:20,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 19:43:20,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691252864] [2019-10-13 19:43:20,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269397334] [2019-10-13 19:43:20,204 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:20,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:43:20,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:20,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:43:20,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 19:43:20,333 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:20,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 19:43:20,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556384605] [2019-10-13 19:43:20,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:43:20,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:43:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:43:20,335 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-13 19:43:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:20,592 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-13 19:43:20,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:43:20,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-13 19:43:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:20,594 INFO L225 Difference]: With dead ends: 93 [2019-10-13 19:43:20,594 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 19:43:20,595 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:43:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 19:43:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-13 19:43:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 19:43:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 19:43:20,601 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-13 19:43:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:20,601 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 19:43:20,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:43:20,602 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 19:43:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 19:43:20,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:20,603 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:20,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:20,807 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:20,807 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-13 19:43:20,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:20,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006416059] [2019-10-13 19:43:20,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:20,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:20,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-13 19:43:20,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006416059] [2019-10-13 19:43:20,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239229315] [2019-10-13 19:43:20,998 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:21,179 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 19:43:21,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:21,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:43:21,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 19:43:21,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:21,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 19:43:21,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064261229] [2019-10-13 19:43:21,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:43:21,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:43:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:43:21,283 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-13 19:43:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:21,568 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-13 19:43:21,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:43:21,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-13 19:43:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:21,570 INFO L225 Difference]: With dead ends: 99 [2019-10-13 19:43:21,570 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 19:43:21,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:43:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 19:43:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-13 19:43:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 19:43:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 19:43:21,577 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-13 19:43:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:21,578 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 19:43:21,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:43:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 19:43:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 19:43:21,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:21,579 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:21,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:21,791 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-13 19:43:21,792 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:21,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608924780] [2019-10-13 19:43:21,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:21,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:21,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 19:43:21,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608924780] [2019-10-13 19:43:21,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653960342] [2019-10-13 19:43:21,957 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:22,084 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 19:43:22,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:22,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:43:22,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-13 19:43:22,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:22,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 19:43:22,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867313617] [2019-10-13 19:43:22,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:43:22,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:43:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:43:22,145 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-13 19:43:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:22,329 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-13 19:43:22,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:43:22,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 19:43:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:22,331 INFO L225 Difference]: With dead ends: 105 [2019-10-13 19:43:22,331 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 19:43:22,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:43:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 19:43:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-13 19:43:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 19:43:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-13 19:43:22,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-13 19:43:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:22,337 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-13 19:43:22,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:43:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-13 19:43:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 19:43:22,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:22,339 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:22,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:22,549 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-13 19:43:22,550 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:22,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596193148] [2019-10-13 19:43:22,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:22,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:22,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 19:43:22,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596193148] [2019-10-13 19:43:22,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202770170] [2019-10-13 19:43:22,773 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:22,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:43:22,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 19:43:22,884 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:22,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 19:43:22,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403345868] [2019-10-13 19:43:22,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:43:22,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:43:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:43:22,886 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-13 19:43:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:22,992 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-13 19:43:22,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:43:22,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-13 19:43:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:22,993 INFO L225 Difference]: With dead ends: 108 [2019-10-13 19:43:22,993 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 19:43:22,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:43:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 19:43:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-13 19:43:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 19:43:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-13 19:43:22,998 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-13 19:43:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:22,999 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-13 19:43:22,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:43:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-13 19:43:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 19:43:23,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:23,000 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:23,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:23,201 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-13 19:43:23,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:23,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000370867] [2019-10-13 19:43:23,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:23,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:23,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 19:43:23,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000370867] [2019-10-13 19:43:23,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262691096] [2019-10-13 19:43:23,411 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:23,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:23,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:23,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:43:23,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 19:43:23,513 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:23,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 19:43:23,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94679837] [2019-10-13 19:43:23,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:43:23,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:23,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:43:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:43:23,515 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-13 19:43:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:23,630 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-13 19:43:23,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:43:23,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-13 19:43:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:23,631 INFO L225 Difference]: With dead ends: 110 [2019-10-13 19:43:23,631 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 19:43:23,632 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:43:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 19:43:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 19:43:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 19:43:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 19:43:23,637 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-13 19:43:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:23,637 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 19:43:23,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:43:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 19:43:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 19:43:23,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:23,638 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:23,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:23,839 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:23,839 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-13 19:43:23,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:23,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342400484] [2019-10-13 19:43:23,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:23,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:23,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 19:43:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342400484] [2019-10-13 19:43:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862745126] [2019-10-13 19:43:24,073 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:24,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:43:24,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:24,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:43:24,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-13 19:43:24,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:24,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 19:43:24,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564543774] [2019-10-13 19:43:24,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:43:24,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:43:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:43:24,243 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-13 19:43:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:24,452 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-13 19:43:24,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 19:43:24,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-13 19:43:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:24,454 INFO L225 Difference]: With dead ends: 115 [2019-10-13 19:43:24,454 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 19:43:24,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:43:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 19:43:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 19:43:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 19:43:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-13 19:43:24,460 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-13 19:43:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:24,461 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-13 19:43:24,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:43:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-13 19:43:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 19:43:24,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:24,462 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:24,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:24,666 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-13 19:43:24,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:24,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497622387] [2019-10-13 19:43:24,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:24,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:24,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 19:43:24,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497622387] [2019-10-13 19:43:24,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46305238] [2019-10-13 19:43:24,926 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:25,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:43:25,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:25,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:43:25,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 19:43:25,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:25,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 19:43:25,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221661851] [2019-10-13 19:43:25,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:43:25,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:43:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:43:25,115 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-13 19:43:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:25,282 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-13 19:43:25,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:43:25,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-13 19:43:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:25,283 INFO L225 Difference]: With dead ends: 118 [2019-10-13 19:43:25,284 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 19:43:25,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:43:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 19:43:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 19:43:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 19:43:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-13 19:43:25,289 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-13 19:43:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:25,289 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-13 19:43:25,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:43:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-13 19:43:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 19:43:25,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:25,291 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:25,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:25,496 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-13 19:43:25,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:25,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411450284] [2019-10-13 19:43:25,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:25,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:25,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 19:43:25,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411450284] [2019-10-13 19:43:25,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676438107] [2019-10-13 19:43:25,815 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:27,439 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 19:43:27,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:27,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:43:27,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-13 19:43:27,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:27,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-13 19:43:27,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529952397] [2019-10-13 19:43:27,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:43:27,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:27,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:43:27,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:43:27,568 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-13 19:43:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:27,934 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-13 19:43:27,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 19:43:27,935 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-13 19:43:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:27,936 INFO L225 Difference]: With dead ends: 123 [2019-10-13 19:43:27,936 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 19:43:27,937 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:43:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 19:43:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-13 19:43:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 19:43:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-13 19:43:27,942 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-13 19:43:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:27,942 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-13 19:43:27,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:43:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-13 19:43:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 19:43:27,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:27,944 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:28,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:28,150 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-13 19:43:28,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:28,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422143685] [2019-10-13 19:43:28,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:28,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:28,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-13 19:43:28,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422143685] [2019-10-13 19:43:28,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661587368] [2019-10-13 19:43:28,447 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:28,787 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 19:43:28,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:28,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:43:28,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-13 19:43:28,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:28,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-13 19:43:28,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574441451] [2019-10-13 19:43:28,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:43:28,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:43:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:43:28,902 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-13 19:43:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:29,130 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-13 19:43:29,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 19:43:29,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-13 19:43:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:29,133 INFO L225 Difference]: With dead ends: 129 [2019-10-13 19:43:29,133 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 19:43:29,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:43:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 19:43:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-13 19:43:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 19:43:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-13 19:43:29,139 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-13 19:43:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:29,139 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-13 19:43:29,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:43:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-13 19:43:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 19:43:29,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:29,141 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:29,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:29,346 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-10-13 19:43:29,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:29,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626312192] [2019-10-13 19:43:29,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:29,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:29,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 19:43:29,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626312192] [2019-10-13 19:43:29,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320118347] [2019-10-13 19:43:29,689 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:29,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:43:29,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 19:43:29,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:29,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 19:43:29,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322176884] [2019-10-13 19:43:29,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:43:29,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:43:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:43:29,910 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-13 19:43:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:30,064 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-13 19:43:30,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 19:43:30,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-13 19:43:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:30,066 INFO L225 Difference]: With dead ends: 132 [2019-10-13 19:43:30,066 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 19:43:30,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:43:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 19:43:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 19:43:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 19:43:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-13 19:43:30,072 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-13 19:43:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:30,072 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-13 19:43:30,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:43:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-13 19:43:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 19:43:30,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:30,074 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:30,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:30,278 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-10-13 19:43:30,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:30,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056947802] [2019-10-13 19:43:30,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:30,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:30,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 19:43:30,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056947802] [2019-10-13 19:43:30,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247645313] [2019-10-13 19:43:30,558 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:30,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:30,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:30,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 19:43:30,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 19:43:30,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:30,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 19:43:30,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644536370] [2019-10-13 19:43:30,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 19:43:30,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 19:43:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:43:30,694 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-13 19:43:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:30,928 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 19:43:30,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 19:43:30,929 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-13 19:43:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:30,929 INFO L225 Difference]: With dead ends: 134 [2019-10-13 19:43:30,930 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 19:43:30,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:43:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 19:43:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 19:43:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 19:43:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-13 19:43:30,941 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-13 19:43:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:30,942 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-13 19:43:30,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 19:43:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-13 19:43:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 19:43:30,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:30,943 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:31,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:31,144 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-10-13 19:43:31,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:31,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801120251] [2019-10-13 19:43:31,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:31,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:31,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 19:43:31,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801120251] [2019-10-13 19:43:31,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909884271] [2019-10-13 19:43:31,477 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:31,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 19:43:31,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:31,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:43:31,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-13 19:43:31,765 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:31,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-13 19:43:31,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7439914] [2019-10-13 19:43:31,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:43:31,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:43:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:43:31,768 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-13 19:43:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:32,089 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-13 19:43:32,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 19:43:32,090 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-13 19:43:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:32,091 INFO L225 Difference]: With dead ends: 139 [2019-10-13 19:43:32,092 INFO L226 Difference]: Without dead ends: 97 [2019-10-13 19:43:32,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:43:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-13 19:43:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-13 19:43:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 19:43:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-13 19:43:32,103 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-13 19:43:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:32,103 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-13 19:43:32,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 19:43:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-13 19:43:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 19:43:32,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:32,115 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:32,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:32,321 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-10-13 19:43:32,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:32,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357980403] [2019-10-13 19:43:32,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:32,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:32,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 19:43:32,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357980403] [2019-10-13 19:43:32,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486446142] [2019-10-13 19:43:32,739 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:32,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:43:32,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:32,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 19:43:32,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 19:43:32,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:32,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 19:43:32,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84707537] [2019-10-13 19:43:32,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 19:43:32,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 19:43:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:43:32,931 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-13 19:43:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:33,210 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-13 19:43:33,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 19:43:33,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-13 19:43:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:33,211 INFO L225 Difference]: With dead ends: 142 [2019-10-13 19:43:33,212 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 19:43:33,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:43:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 19:43:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-13 19:43:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 19:43:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-13 19:43:33,218 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-13 19:43:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:33,219 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-13 19:43:33,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 19:43:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-13 19:43:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 19:43:33,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:33,222 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:33,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:33,427 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:33,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-10-13 19:43:33,428 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:33,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482427026] [2019-10-13 19:43:33,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:33,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:33,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 19:43:33,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482427026] [2019-10-13 19:43:33,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792096210] [2019-10-13 19:43:33,834 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:37,689 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-13 19:43:37,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:37,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:43:37,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-13 19:43:37,834 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:37,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-13 19:43:37,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294489621] [2019-10-13 19:43:37,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 19:43:37,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 19:43:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:43:37,836 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-13 19:43:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:38,286 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-13 19:43:38,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 19:43:38,286 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-13 19:43:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:38,287 INFO L225 Difference]: With dead ends: 147 [2019-10-13 19:43:38,287 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 19:43:38,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 19:43:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 19:43:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-13 19:43:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-13 19:43:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-13 19:43:38,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-13 19:43:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:38,293 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-13 19:43:38,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 19:43:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-13 19:43:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 19:43:38,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:38,294 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:38,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:38,498 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-10-13 19:43:38,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:38,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407905786] [2019-10-13 19:43:38,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:38,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:38,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-13 19:43:39,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407905786] [2019-10-13 19:43:39,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884128888] [2019-10-13 19:43:39,297 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:41,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 19:43:41,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:41,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:43:41,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-13 19:43:41,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:41,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-13 19:43:41,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376445865] [2019-10-13 19:43:41,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 19:43:41,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:41,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 19:43:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:43:41,478 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-13 19:43:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:41,779 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-13 19:43:41,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 19:43:41,779 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-13 19:43:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:41,780 INFO L225 Difference]: With dead ends: 153 [2019-10-13 19:43:41,781 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 19:43:41,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:43:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 19:43:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-13 19:43:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 19:43:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-13 19:43:41,787 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-13 19:43:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:41,787 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-13 19:43:41,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 19:43:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-13 19:43:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 19:43:41,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:41,789 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:41,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:41,995 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-10-13 19:43:41,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:41,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107704277] [2019-10-13 19:43:41,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:41,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:41,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:43:42,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107704277] [2019-10-13 19:43:42,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304267203] [2019-10-13 19:43:42,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:42,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 19:43:42,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:43:42,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:42,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 19:43:42,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288392743] [2019-10-13 19:43:42,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 19:43:42,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 19:43:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:43:42,535 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-13 19:43:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:42,769 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-13 19:43:42,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 19:43:42,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-13 19:43:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:42,772 INFO L225 Difference]: With dead ends: 156 [2019-10-13 19:43:42,772 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 19:43:42,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:43:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 19:43:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-13 19:43:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 19:43:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-13 19:43:42,779 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-13 19:43:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:42,779 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-13 19:43:42,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 19:43:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-13 19:43:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 19:43:42,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:42,781 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:42,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:42,985 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-10-13 19:43:42,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:42,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894889543] [2019-10-13 19:43:42,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:42,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:42,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:43:43,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894889543] [2019-10-13 19:43:43,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515244613] [2019-10-13 19:43:43,459 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:43,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:43,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:43,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 19:43:43,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:43:43,592 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:43,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 19:43:43,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714060954] [2019-10-13 19:43:43,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 19:43:43,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 19:43:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:43:43,594 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-13 19:43:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:43,752 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-13 19:43:43,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 19:43:43,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-13 19:43:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:43,754 INFO L225 Difference]: With dead ends: 158 [2019-10-13 19:43:43,755 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 19:43:43,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:43:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 19:43:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 19:43:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 19:43:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-13 19:43:43,761 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-13 19:43:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:43,762 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-13 19:43:43,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 19:43:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-13 19:43:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 19:43:43,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:43,763 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:43,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:43,967 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-10-13 19:43:43,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:43,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903780177] [2019-10-13 19:43:43,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:43,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:43,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:43:44,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903780177] [2019-10-13 19:43:44,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920768184] [2019-10-13 19:43:44,479 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:44,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 19:43:44,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:44,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:43:44,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-13 19:43:44,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:44,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-13 19:43:44,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056848943] [2019-10-13 19:43:44,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 19:43:44,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 19:43:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:43:44,915 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-13 19:43:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:45,445 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-13 19:43:45,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 19:43:45,445 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-13 19:43:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:45,446 INFO L225 Difference]: With dead ends: 163 [2019-10-13 19:43:45,446 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 19:43:45,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-13 19:43:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 19:43:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-13 19:43:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-13 19:43:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-13 19:43:45,456 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-13 19:43:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:45,457 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-13 19:43:45,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 19:43:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-13 19:43:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 19:43:45,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:45,458 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:45,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:45,662 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-10-13 19:43:45,663 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:45,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483742944] [2019-10-13 19:43:45,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:45,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:45,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-13 19:43:46,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483742944] [2019-10-13 19:43:46,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802830487] [2019-10-13 19:43:46,094 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:46,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:43:46,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:46,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:43:46,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-13 19:43:46,480 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:46,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-13 19:43:46,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108741290] [2019-10-13 19:43:46,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 19:43:46,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 19:43:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:43:46,482 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-13 19:43:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:47,100 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-13 19:43:47,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 19:43:47,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-13 19:43:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:47,102 INFO L225 Difference]: With dead ends: 169 [2019-10-13 19:43:47,102 INFO L226 Difference]: Without dead ends: 119 [2019-10-13 19:43:47,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 19:43:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-13 19:43:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-13 19:43:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 19:43:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-13 19:43:47,118 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-13 19:43:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:47,119 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-13 19:43:47,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-13 19:43:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-13 19:43:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 19:43:47,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:47,121 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:47,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:47,327 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-10-13 19:43:47,328 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:47,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745122264] [2019-10-13 19:43:47,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:47,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:47,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-13 19:43:47,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745122264] [2019-10-13 19:43:47,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505927813] [2019-10-13 19:43:47,912 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true