/usr/bin/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/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:11:40,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:11:40,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:11:40,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:11:40,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:11:40,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:11:40,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:11:40,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:11:40,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:11:40,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:11:40,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:11:40,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:11:40,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:11:40,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:11:40,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:11:40,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:11:40,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:11:40,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:11:40,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:11:40,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:11:40,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:11:40,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:11:40,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:11:40,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:11:40,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:11:40,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:11:40,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:11:40,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:11:40,927 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 [2019-11-06 22:11:40,941 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:11:40,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:11:40,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:11:40,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:11:40,943 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:11:40,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:11:40,944 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:11:40,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:11:40,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:11:40,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:11:40,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:11:40,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:11:40,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:11:40,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:11:40,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:11:40,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:11:40,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:40,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:11:40,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:11:40,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:11:40,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:11:40,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:11:40,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:11:40,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:11:41,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:11:41,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:11:41,255 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:11:41,256 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:11:41,257 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:11:41,258 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-11-06 22:11:41,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b0380f2/25b708f07d794241b566375b1342421e/FLAGdb6dbef97 [2019-11-06 22:11:41,804 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:11:41,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-11-06 22:11:41,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b0380f2/25b708f07d794241b566375b1342421e/FLAGdb6dbef97 [2019-11-06 22:11:42,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b0380f2/25b708f07d794241b566375b1342421e [2019-11-06 22:11:42,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:11:42,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:11:42,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:42,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:11:42,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:11:42,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611855c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42, skipping insertion in model container [2019-11-06 22:11:42,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,216 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:11:42,231 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:11:42,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:42,481 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:11:42,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:42,518 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:11:42,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42 WrapperNode [2019-11-06 22:11:42,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:42,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:11:42,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:11:42,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:11:42,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (1/1) ... [2019-11-06 22:11:42,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:11:42,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:11:42,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:11:42,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:11:42,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (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 [2019-11-06 22:11:42,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:11:42,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:11:42,694 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-06 22:11:42,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:11:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:11:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:11:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:11:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:11:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:11:42,979 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:11:42,979 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:11:42,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:42 BoogieIcfgContainer [2019-11-06 22:11:42,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:11:42,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:11:42,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:11:42,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:11:42,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:42" (1/3) ... [2019-11-06 22:11:42,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:42, skipping insertion in model container [2019-11-06 22:11:42,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:42" (2/3) ... [2019-11-06 22:11:42,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:42, skipping insertion in model container [2019-11-06 22:11:42,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:42" (3/3) ... [2019-11-06 22:11:42,989 INFO L109 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2019-11-06 22:11:43,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:11:43,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:11:43,017 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:11:43,040 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:11:43,040 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:11:43,040 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:11:43,041 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:11:43,041 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:11:43,041 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:11:43,041 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:11:43,041 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:11:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 22:11:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:43,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:43,067 INFO L410 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] [2019-11-06 22:11:43,070 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-11-06 22:11:43,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:43,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975942615] [2019-11-06 22:11:43,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:43,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975942615] [2019-11-06 22:11:43,276 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:43,276 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:11:43,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159870179] [2019-11-06 22:11:43,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:43,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:43,308 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 22:11:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:43,434 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 22:11:43,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:43,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:43,445 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:11:43,445 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 22:11:43,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 22:11:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 22:11:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 22:11:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 22:11:43,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 22:11:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:43,488 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 22:11:43,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 22:11:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:43,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:43,491 INFO L410 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] [2019-11-06 22:11:43,491 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:43,492 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-11-06 22:11:43,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:43,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120252804] [2019-11-06 22:11:43,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:11:43,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120252804] [2019-11-06 22:11:43,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730240267] [2019-11-06 22:11:43,611 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 [2019-11-06 22:11:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:43,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:43,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:43,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:43,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:11:43,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243346776] [2019-11-06 22:11:43,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:43,736 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:43,737 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 22:11:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:43,758 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 22:11:43,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:43,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:43,761 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:11:43,761 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 22:11:43,762 INFO L630 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 [2019-11-06 22:11:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 22:11:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 22:11:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:11:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 22:11:43,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 22:11:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:43,781 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 22:11:43,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 22:11:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:11:43,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:43,783 INFO L410 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] [2019-11-06 22:11:43,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:43,984 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-11-06 22:11:43,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:43,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828037877] [2019-11-06 22:11:43,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:11:44,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828037877] [2019-11-06 22:11:44,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445014541] [2019-11-06 22:11:44,174 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 [2019-11-06 22:11:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:44,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:11:44,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:44,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:11:44,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044984218] [2019-11-06 22:11:44,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:44,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:44,261 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 22:11:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:44,286 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 22:11:44,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:44,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:11:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:44,288 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:11:44,288 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:11:44,289 INFO L630 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 [2019-11-06 22:11:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:11:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:11:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:11:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 22:11:44,295 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 22:11:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:44,296 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 22:11:44,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 22:11:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:11:44,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:44,297 INFO L410 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] [2019-11-06 22:11:44,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:44,509 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-11-06 22:11:44,511 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:44,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838781472] [2019-11-06 22:11:44,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:11:44,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838781472] [2019-11-06 22:11:44,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370506975] [2019-11-06 22:11:44,633 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 [2019-11-06 22:11:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:44,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 22:11:44,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:44,715 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 22:11:44,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811792140] [2019-11-06 22:11:44,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:44,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:44,717 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 22:11:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:44,733 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 22:11:44,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:44,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:11:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:44,734 INFO L225 Difference]: With dead ends: 43 [2019-11-06 22:11:44,734 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:11:44,735 INFO L630 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 [2019-11-06 22:11:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:11:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:11:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:11:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 22:11:44,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 22:11:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:44,748 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 22:11:44,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 22:11:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:11:44,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:44,750 INFO L410 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] [2019-11-06 22:11:44,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:44,954 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:44,955 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-11-06 22:11:44,956 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:44,956 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510310454] [2019-11-06 22:11:44,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:11:45,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510310454] [2019-11-06 22:11:45,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009969141] [2019-11-06 22:11:45,093 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 [2019-11-06 22:11:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:45,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:11:45,172 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:45,172 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 22:11:45,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783597169] [2019-11-06 22:11:45,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:45,173 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:45,174 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 22:11:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:45,324 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 22:11:45,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:11:45,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 22:11:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:45,327 INFO L225 Difference]: With dead ends: 55 [2019-11-06 22:11:45,327 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:11:45,328 INFO L630 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 [2019-11-06 22:11:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:11:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 22:11:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:11:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 22:11:45,342 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 22:11:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:45,343 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 22:11:45,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 22:11:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:11:45,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:45,349 INFO L410 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] [2019-11-06 22:11:45,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:45,550 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-11-06 22:11:45,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:45,551 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258176150] [2019-11-06 22:11:45,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:45,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258176150] [2019-11-06 22:11:45,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184276381] [2019-11-06 22:11:45,678 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 [2019-11-06 22:11:45,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:45,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:45,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:45,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:45,779 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:45,779 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:11:45,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600783747] [2019-11-06 22:11:45,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:45,780 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:45,781 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 22:11:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:45,870 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 22:11:45,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:11:45,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:11:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:45,871 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:11:45,871 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:11:45,872 INFO L630 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 [2019-11-06 22:11:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:11:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:11:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:11:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 22:11:45,879 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 22:11:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:45,880 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 22:11:45,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 22:11:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:11:45,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:45,881 INFO L410 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] [2019-11-06 22:11:46,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:46,088 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-11-06 22:11:46,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:46,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566741707] [2019-11-06 22:11:46,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:46,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566741707] [2019-11-06 22:11:46,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141435162] [2019-11-06 22:11:46,217 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 [2019-11-06 22:11:46,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 22:11:46,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:46,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:46,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 22:11:46,331 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:46,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:11:46,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421931159] [2019-11-06 22:11:46,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:46,333 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:46,333 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 22:11:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:46,453 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 22:11:46,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:46,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:11:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:46,455 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:11:46,455 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 22:11:46,456 INFO L630 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 [2019-11-06 22:11:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 22:11:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 22:11:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:11:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 22:11:46,470 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 22:11:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:46,470 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 22:11:46,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 22:11:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:11:46,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:46,472 INFO L410 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] [2019-11-06 22:11:46,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:46,683 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-11-06 22:11:46,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:46,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258925225] [2019-11-06 22:11:46,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:11:46,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258925225] [2019-11-06 22:11:46,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377492175] [2019-11-06 22:11:46,801 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 [2019-11-06 22:11:46,850 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:46,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:46,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:46,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 22:11:46,911 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:46,911 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 22:11:46,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060198622] [2019-11-06 22:11:46,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:46,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:46,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:46,915 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2019-11-06 22:11:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:47,077 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-11-06 22:11:47,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:47,078 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-11-06 22:11:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:47,079 INFO L225 Difference]: With dead ends: 68 [2019-11-06 22:11:47,079 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 22:11:47,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 22:11:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-06 22:11:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 22:11:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 22:11:47,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-11-06 22:11:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:47,092 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 22:11:47,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 22:11:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:11:47,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:47,093 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 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] [2019-11-06 22:11:47,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:47,297 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1261247541, now seen corresponding path program 5 times [2019-11-06 22:11:47,298 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:47,298 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818840350] [2019-11-06 22:11:47,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-06 22:11:47,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818840350] [2019-11-06 22:11:47,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870550636] [2019-11-06 22:11:47,402 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 [2019-11-06 22:11:47,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 22:11:47,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:47,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:47,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 22:11:47,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:47,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 22:11:47,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916192069] [2019-11-06 22:11:47,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:47,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:47,555 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2019-11-06 22:11:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:47,695 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-11-06 22:11:47,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:47,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2019-11-06 22:11:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:47,697 INFO L225 Difference]: With dead ends: 74 [2019-11-06 22:11:47,697 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 22:11:47,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 22:11:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 22:11:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 22:11:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-06 22:11:47,704 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-11-06 22:11:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:47,704 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-06 22:11:47,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-06 22:11:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 22:11:47,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:47,706 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 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] [2019-11-06 22:11:47,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:47,910 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1824730713, now seen corresponding path program 6 times [2019-11-06 22:11:47,911 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:47,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298626327] [2019-11-06 22:11:47,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-06 22:11:48,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298626327] [2019-11-06 22:11:48,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273326108] [2019-11-06 22:11:48,014 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 [2019-11-06 22:11:48,116 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:11:48,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:48,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:48,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 22:11:48,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:48,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 22:11:48,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132096314] [2019-11-06 22:11:48,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:48,170 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:48,170 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-11-06 22:11:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:48,374 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-11-06 22:11:48,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:48,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-11-06 22:11:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:48,376 INFO L225 Difference]: With dead ends: 80 [2019-11-06 22:11:48,376 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 22:11:48,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 22:11:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-06 22:11:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 22:11:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 22:11:48,383 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-11-06 22:11:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:48,383 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 22:11:48,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 22:11:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:11:48,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:48,385 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 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] [2019-11-06 22:11:48,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:48,594 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1986573693, now seen corresponding path program 7 times [2019-11-06 22:11:48,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:48,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989008948] [2019-11-06 22:11:48,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat