/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/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:35,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:35,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:35,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:35,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:35,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:35,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:35,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:35,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:35,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:35,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:35,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:35,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:35,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:35,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:35,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:35,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:35,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:35,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:35,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:35,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:35,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:35,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:35,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:35,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:35,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:35,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:35,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:35,191 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 18:47:35,205 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:35,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:35,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:35,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:35,207 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:35,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:35,207 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:35,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:35,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:35,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:35,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:35,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:35,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:35,209 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:35,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:35,209 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:35,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:35,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:35,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:35,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:35,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:35,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:35,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:35,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:35,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:35,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:35,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:35,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:35,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:35,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:35,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:35,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:35,481 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:35,482 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:35,482 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-06 18:47:35,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6f96195/7c19ce78fe2e4d3f8aa4ad20236df4b6/FLAGfe21fba96 [2019-11-06 18:47:36,036 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:36,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-06 18:47:36,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6f96195/7c19ce78fe2e4d3f8aa4ad20236df4b6/FLAGfe21fba96 [2019-11-06 18:47:36,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6f96195/7c19ce78fe2e4d3f8aa4ad20236df4b6 [2019-11-06 18:47:36,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:36,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:36,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:36,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:36,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:36,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6116f611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36, skipping insertion in model container [2019-11-06 18:47:36,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,441 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:36,461 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:36,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:36,665 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:36,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:36,704 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:36,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36 WrapperNode [2019-11-06 18:47:36,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:36,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:36,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:36,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:36,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (1/1) ... [2019-11-06 18:47:36,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:36,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:36,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:36,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:36,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (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 18:47:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:37,123 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:37,124 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:37,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:37 BoogieIcfgContainer [2019-11-06 18:47:37,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:37,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:37,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:37,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:37,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:36" (1/3) ... [2019-11-06 18:47:37,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e884c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:37, skipping insertion in model container [2019-11-06 18:47:37,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:36" (2/3) ... [2019-11-06 18:47:37,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e884c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:37, skipping insertion in model container [2019-11-06 18:47:37,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:37" (3/3) ... [2019-11-06 18:47:37,150 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2019-11-06 18:47:37,178 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:37,192 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:37,208 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:37,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:37,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:37,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:37,233 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:37,233 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:37,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:37,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:37,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:47:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:37,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:37,254 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:37,256 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:47:37,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:37,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501871577] [2019-11-06 18:47:37,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:37,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501871577] [2019-11-06 18:47:37,420 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:37,420 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:37,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583471649] [2019-11-06 18:47:37,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:37,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:37,444 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:47:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:37,585 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:47:37,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:37,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:47:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:37,603 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:47:37,604 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:47:37,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:47:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:47:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:47:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:47:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:47:37,674 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:47:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:37,676 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:47:37,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:47:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:37,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:37,678 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:37,679 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:37,680 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:47:37,680 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:37,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746073175] [2019-11-06 18:47:37,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:37,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746073175] [2019-11-06 18:47:37,828 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:37,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:37,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138061166] [2019-11-06 18:47:37,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:37,831 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:37,832 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:47:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:37,923 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:47:37,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:37,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:47:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:37,926 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:47:37,926 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:47:37,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:47:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:47:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:47:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:47:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:47:37,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:47:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:37,939 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:47:37,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:47:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:47:37,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:37,941 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:37,941 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:47:37,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:37,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241542934] [2019-11-06 18:47:37,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:38,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241542934] [2019-11-06 18:47:38,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:38,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:38,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287030533] [2019-11-06 18:47:38,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:38,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:38,048 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:47:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:38,126 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:47:38,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:38,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:47:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:38,130 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:47:38,130 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:47:38,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:47:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:47:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:47:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:47:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:47:38,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:47:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:38,141 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:47:38,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:47:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:47:38,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:38,142 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:38,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:38,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:47:38,143 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:38,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106297768] [2019-11-06 18:47:38,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:38,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106297768] [2019-11-06 18:47:38,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604276963] [2019-11-06 18:47:38,221 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 18:47:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:47:38,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:38,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:38,361 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:47:38,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21829346] [2019-11-06 18:47:38,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:47:38,362 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:47:38,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:38,363 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:47:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:38,513 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:47:38,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:47:38,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:47:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:38,517 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:47:38,518 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:47:38,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:47:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:47:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:47:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:47:38,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:47:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:38,532 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:47:38,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:47:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:47:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:47:38,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:38,534 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:38,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:38,741 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:47:38,742 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:38,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578706870] [2019-11-06 18:47:38,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:47:38,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578706870] [2019-11-06 18:47:38,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887212893] [2019-11-06 18:47:38,833 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 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 18:47:38,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:38,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:38,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:38,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:38,926 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:38,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:47:38,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247964944] [2019-11-06 18:47:38,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:38,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:38,928 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-06 18:47:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:39,051 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-11-06 18:47:39,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:39,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 18:47:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:39,053 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:39,053 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:47:39,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:47:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:47:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:47:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:47:39,067 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-11-06 18:47:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:39,067 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:47:39,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:47:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:47:39,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:39,069 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:39,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:39,277 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-11-06 18:47:39,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:39,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476791036] [2019-11-06 18:47:39,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:39,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476791036] [2019-11-06 18:47:39,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021051634] [2019-11-06 18:47:39,395 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 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 18:47:39,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:47:39,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:39,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:39,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:39,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:39,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:47:39,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465561351] [2019-11-06 18:47:39,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:47:39,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:47:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:39,475 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-06 18:47:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:39,601 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-06 18:47:39,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:47:39,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:47:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:39,603 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:39,603 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:47:39,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:47:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-11-06 18:47:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:47:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:47:39,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-11-06 18:47:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:39,620 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:47:39,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:47:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:47:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:47:39,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:39,621 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:39,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:39,822 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-11-06 18:47:39,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:39,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739621575] [2019-11-06 18:47:39,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:39,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739621575] [2019-11-06 18:47:39,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793613499] [2019-11-06 18:47:39,948 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 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 18:47:40,007 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:40,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:40,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:47:40,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:47:40,076 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:40,076 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2019-11-06 18:47:40,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322099332] [2019-11-06 18:47:40,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:40,077 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:40,078 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-11-06 18:47:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:40,245 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-11-06 18:47:40,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:40,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-11-06 18:47:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:40,247 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:47:40,247 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:47:40,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:47:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-11-06 18:47:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:47:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-06 18:47:40,255 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-11-06 18:47:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:40,256 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-06 18:47:40,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-06 18:47:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:47:40,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:40,267 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:40,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:40,472 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1963168809, now seen corresponding path program 5 times [2019-11-06 18:47:40,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:40,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120605106] [2019-11-06 18:47:40,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:40,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120605106] [2019-11-06 18:47:40,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970508545] [2019-11-06 18:47:40,625 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 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 18:47:40,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:47:40,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:40,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:40,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:40,780 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:40,780 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:47:40,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003280935] [2019-11-06 18:47:40,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:40,781 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:40,781 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2019-11-06 18:47:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:40,942 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:47:40,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:40,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-06 18:47:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:40,944 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:47:40,944 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:47:40,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:47:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-11-06 18:47:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:47:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 18:47:40,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2019-11-06 18:47:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:40,951 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 18:47:40,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 18:47:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:47:40,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:40,953 INFO L410 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:41,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:41,158 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 6 times [2019-11-06 18:47:41,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:41,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635174521] [2019-11-06 18:47:41,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:41,280 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635174521] [2019-11-06 18:47:41,280 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223843731] [2019-11-06 18:47:41,280 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 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 18:47:41,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:47:41,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:41,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:47:41,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:41,472 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:41,472 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:47:41,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429196446] [2019-11-06 18:47:41,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:47:41,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:41,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:47:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:47:41,474 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2019-11-06 18:47:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:41,652 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-11-06 18:47:41,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:47:41,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-11-06 18:47:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:41,653 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:47:41,654 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:47:41,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:47:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:47:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-11-06 18:47:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:47:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-06 18:47:41,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-11-06 18:47:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:41,661 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-06 18:47:41,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:47:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-06 18:47:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:47:41,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:41,662 INFO L410 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:41,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:41,867 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 7 times [2019-11-06 18:47:41,868 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:41,868 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483691103] [2019-11-06 18:47:41,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:41,966 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483691103] [2019-11-06 18:47:41,966 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305435133] [2019-11-06 18:47:41,966 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 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 18:47:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:42,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:47:42,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:47:42,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:42,159 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2019-11-06 18:47:42,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044457477] [2019-11-06 18:47:42,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:47:42,160 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:47:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:47:42,168 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 20 states. [2019-11-06 18:47:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:42,460 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-11-06 18:47:42,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:47:42,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2019-11-06 18:47:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:42,461 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:47:42,462 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:47:42,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:47:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:47:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2019-11-06 18:47:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:47:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-06 18:47:42,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2019-11-06 18:47:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:42,478 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-06 18:47:42,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:47:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-06 18:47:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:47:42,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:42,481 INFO L410 BasicCegarLoop]: trace histogram [16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:42,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:42,686 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash -35040986, now seen corresponding path program 8 times [2019-11-06 18:47:42,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:42,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095159744] [2019-11-06 18:47:42,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:47:42,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095159744] [2019-11-06 18:47:42,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146528000] [2019-11-06 18:47:42,838 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 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 18:47:42,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:42,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:42,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:47:42,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:43,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:43,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 26 [2019-11-06 18:47:43,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359786807] [2019-11-06 18:47:43,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:47:43,057 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:47:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:47:43,058 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 26 states. [2019-11-06 18:47:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:43,316 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2019-11-06 18:47:43,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:47:43,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2019-11-06 18:47:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:43,318 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:47:43,318 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:47:43,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:47:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:47:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2019-11-06 18:47:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:47:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-06 18:47:43,327 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2019-11-06 18:47:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:43,327 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-06 18:47:43,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:47:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-06 18:47:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:47:43,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:43,328 INFO L410 BasicCegarLoop]: trace histogram [22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:43,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:43,531 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1170528361, now seen corresponding path program 9 times [2019-11-06 18:47:43,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:43,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918893978] [2019-11-06 18:47:43,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 18:47:43,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918893978] [2019-11-06 18:47:43,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413464540] [2019-11-06 18:47:43,669 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 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 18:47:44,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:47:44,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:44,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:47:44,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 18:47:44,552 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:44,552 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:47:44,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995182984] [2019-11-06 18:47:44,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:44,553 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:44,554 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2019-11-06 18:47:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:44,749 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2019-11-06 18:47:44,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:44,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-11-06 18:47:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:44,751 INFO L225 Difference]: With dead ends: 91 [2019-11-06 18:47:44,751 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 18:47:44,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 18:47:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2019-11-06 18:47:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:47:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-06 18:47:44,760 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2019-11-06 18:47:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:44,760 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-06 18:47:44,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-06 18:47:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:47:44,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:44,762 INFO L410 BasicCegarLoop]: trace histogram [22, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:44,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:44,967 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash -191219962, now seen corresponding path program 10 times [2019-11-06 18:47:44,968 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:44,968 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35938227] [2019-11-06 18:47:44,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 18:47:45,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35938227] [2019-11-06 18:47:45,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064660974] [2019-11-06 18:47:45,105 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 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 [2019-11-06 18:47:45,174 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:45,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:45,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:47:45,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:45,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:45,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 32 [2019-11-06 18:47:45,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687286144] [2019-11-06 18:47:45,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:47:45,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:47:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:47:45,409 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 32 states. [2019-11-06 18:47:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:45,744 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2019-11-06 18:47:45,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:47:45,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2019-11-06 18:47:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:45,746 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:47:45,746 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:47:45,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:47:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:47:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2019-11-06 18:47:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:47:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-06 18:47:45,756 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2019-11-06 18:47:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:45,756 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-06 18:47:45,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:47:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-06 18:47:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:47:45,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:45,757 INFO L410 BasicCegarLoop]: trace histogram [28, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:45,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:45,962 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash 273034889, now seen corresponding path program 11 times [2019-11-06 18:47:45,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:45,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26817156] [2019-11-06 18:47:45,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:47:46,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26817156] [2019-11-06 18:47:46,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568641940] [2019-11-06 18:47:46,116 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 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 [2019-11-06 18:48:18,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-06 18:48:18,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:18,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:48:18,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:48:18,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:18,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31] total 38 [2019-11-06 18:48:18,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528793718] [2019-11-06 18:48:18,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:48:18,811 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:48:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=739, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:48:18,812 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 38 states. [2019-11-06 18:48:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:19,131 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2019-11-06 18:48:19,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 18:48:19,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 54 [2019-11-06 18:48:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:19,133 INFO L225 Difference]: With dead ends: 124 [2019-11-06 18:48:19,133 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:48:19,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=667, Invalid=739, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:48:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:48:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2019-11-06 18:48:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:48:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-06 18:48:19,149 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2019-11-06 18:48:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:19,149 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-06 18:48:19,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:48:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-06 18:48:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:48:19,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:19,150 INFO L410 BasicCegarLoop]: trace histogram [34, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:19,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:19,351 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:19,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1244549734, now seen corresponding path program 12 times [2019-11-06 18:48:19,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:19,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838726387] [2019-11-06 18:48:19,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-11-06 18:48:19,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838726387] [2019-11-06 18:48:19,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013533439] [2019-11-06 18:48:19,527 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 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