/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_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:23,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:23,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:23,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:23,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:23,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:23,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:23,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:23,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:23,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:23,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:23,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:23,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:23,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:23,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:23,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:23,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:23,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:23,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:23,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:23,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:23,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:23,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:23,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:23,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:23,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:23,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:23,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:23,247 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 18:47:23,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:23,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:23,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:23,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:23,288 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:23,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:23,288 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:23,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:23,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:23,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:23,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:23,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:23,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:23,289 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:23,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:23,290 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:23,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:23,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:23,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:23,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:23,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:23,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:23,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:23,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:23,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:23,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:23,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:23,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:23,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:23,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:23,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:23,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:23,595 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:23,596 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:23,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-06 18:47:23,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d3bfe6cf/531cf7e018d243e287471847d2ace414/FLAGc207ab89b [2019-11-06 18:47:24,163 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:24,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-06 18:47:24,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d3bfe6cf/531cf7e018d243e287471847d2ace414/FLAGc207ab89b [2019-11-06 18:47:24,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d3bfe6cf/531cf7e018d243e287471847d2ace414 [2019-11-06 18:47:24,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:24,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:24,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:24,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:24,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:24,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473fe89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24, skipping insertion in model container [2019-11-06 18:47:24,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,624 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:24,643 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:24,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:24,829 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:24,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:24,866 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:24,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24 WrapperNode [2019-11-06 18:47:24,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:24,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:24,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:24,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:24,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... [2019-11-06 18:47:24,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:24,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:24,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:24,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:25,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:25,314 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:25,314 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:25,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:25 BoogieIcfgContainer [2019-11-06 18:47:25,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:25,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:25,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:25,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:25,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:24" (1/3) ... [2019-11-06 18:47:25,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df2c2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:25, skipping insertion in model container [2019-11-06 18:47:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:24" (2/3) ... [2019-11-06 18:47:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df2c2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:25, skipping insertion in model container [2019-11-06 18:47:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:25" (3/3) ... [2019-11-06 18:47:25,331 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-11-06 18:47:25,342 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:25,351 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:25,363 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:25,388 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:25,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:25,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:25,389 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:25,389 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:25,389 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:25,389 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:25,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:47:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:25,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:25,409 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:25,411 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:47:25,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:25,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084628775] [2019-11-06 18:47:25,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,594 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 18:47:25,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084628775] [2019-11-06 18:47:25,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:25,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:25,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404501244] [2019-11-06 18:47:25,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:25,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:25,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:25,615 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:47:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:25,712 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:47:25,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:25,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:47:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:25,722 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:47:25,723 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:47:25,726 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 18:47:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:47:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:47:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:47:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:47:25,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:47:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:25,765 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:47:25,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:47:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:25,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:25,767 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:25,767 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:47:25,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:25,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748342005] [2019-11-06 18:47:25,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,850 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 18:47:25,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748342005] [2019-11-06 18:47:25,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:25,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:25,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983980428] [2019-11-06 18:47:25,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:25,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:25,854 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:47:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:25,938 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:47:25,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:25,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:47:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:25,940 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:47:25,940 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:47:25,941 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 18:47:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:47:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:47:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:47:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:47:25,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:47:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:25,948 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:47:25,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:47:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:47:25,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:25,949 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:25,950 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:47:25,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:25,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56525867] [2019-11-06 18:47:25,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,014 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 18:47:26,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56525867] [2019-11-06 18:47:26,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:26,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:26,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787198380] [2019-11-06 18:47:26,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:26,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:26,021 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:47:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:26,106 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:47:26,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:26,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:47:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:26,111 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:47:26,111 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:47:26,112 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 18:47:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:47:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:47:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:47:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:47:26,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:47:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:26,131 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:47:26,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:47:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:47:26,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:26,133 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 18:47:26,134 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:47:26,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:26,135 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241021136] [2019-11-06 18:47:26,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,256 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 18:47:26,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241021136] [2019-11-06 18:47:26,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111483723] [2019-11-06 18:47:26,258 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 18:47:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:47:26,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:26,370 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 18:47:26,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:26,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:47:26,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855673114] [2019-11-06 18:47:26,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:47:26,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:47:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:26,373 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:47:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:26,484 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:47:26,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:47:26,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:47:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:26,487 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:47:26,487 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:47:26,488 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 18:47:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:47:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:47:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:47:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:47:26,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:47:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:26,494 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:47:26,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:47:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:47:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:47:26,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:26,496 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 18:47:26,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:26,699 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:47:26,701 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:26,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981455805] [2019-11-06 18:47:26,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,814 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 18:47:26,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981455805] [2019-11-06 18:47:26,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550625372] [2019-11-06 18:47:26,819 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 18:47:26,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:26,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:26,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:26,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:26,911 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 18:47:26,912 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:26,912 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:47:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778372685] [2019-11-06 18:47:26,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:26,913 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:26,914 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-06 18:47:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:27,032 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-11-06 18:47:27,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:27,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 18:47:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:27,033 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:27,036 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:47:27,037 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 18:47:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:47:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:47:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:47:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:47:27,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-11-06 18:47:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:27,048 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:47:27,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:47:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:47:27,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:27,050 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 18:47:27,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:27,263 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-11-06 18:47:27,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:27,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235325656] [2019-11-06 18:47:27,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,362 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 18:47:27,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235325656] [2019-11-06 18:47:27,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874392210] [2019-11-06 18:47:27,363 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 18:47:27,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:47:27,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:27,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:27,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:27,434 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 18:47:27,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:27,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:47:27,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918195768] [2019-11-06 18:47:27,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:47:27,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:47:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:27,439 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-06 18:47:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:27,563 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-06 18:47:27,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:47:27,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:47:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:27,565 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:27,565 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:47:27,569 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 18:47:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:47:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-11-06 18:47:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:47:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:47:27,578 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-11-06 18:47:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:27,578 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:47:27,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:47:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:47:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:47:27,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:27,579 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 18:47:27,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:27,780 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-11-06 18:47:27,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:27,782 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586051530] [2019-11-06 18:47:27,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,905 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 18:47:27,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586051530] [2019-11-06 18:47:27,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353039732] [2019-11-06 18:47:27,906 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 18:47:27,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:27,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:27,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:47:27,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:28,035 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 18:47:28,036 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:28,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2019-11-06 18:47:28,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570890586] [2019-11-06 18:47:28,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:28,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:28,039 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-11-06 18:47:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:28,205 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-11-06 18:47:28,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:28,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-11-06 18:47:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:28,207 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:47:28,208 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:47:28,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:47:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-11-06 18:47:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:47:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-06 18:47:28,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-11-06 18:47:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:28,215 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-06 18:47:28,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-06 18:47:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:47:28,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:28,217 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 18:47:28,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:28,421 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1963168809, now seen corresponding path program 5 times [2019-11-06 18:47:28,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:28,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837790813] [2019-11-06 18:47:28,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:28,560 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 18:47:28,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837790813] [2019-11-06 18:47:28,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293988131] [2019-11-06 18:47:28,561 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 18:47:28,789 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:47:28,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:28,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:28,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:28,824 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 18:47:28,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:28,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:47:28,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618812869] [2019-11-06 18:47:28,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:28,826 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:28,827 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2019-11-06 18:47:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:28,960 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:47:28,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:28,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-06 18:47:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:28,962 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:47:28,962 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:47:28,963 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 18:47:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:47:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-11-06 18:47:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:47:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 18:47:28,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2019-11-06 18:47:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:28,981 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 18:47:28,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 18:47:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:47:28,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:28,985 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 18:47:29,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:29,196 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 6 times [2019-11-06 18:47:29,197 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:29,197 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892835543] [2019-11-06 18:47:29,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:29,289 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 18:47:29,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892835543] [2019-11-06 18:47:29,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324227046] [2019-11-06 18:47:29,290 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 18:47:29,444 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:47:29,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:29,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:47:29,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:29,461 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 18:47:29,461 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:29,462 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:47:29,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846137706] [2019-11-06 18:47:29,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:47:29,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:47:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:47:29,463 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2019-11-06 18:47:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:29,648 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-11-06 18:47:29,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:47:29,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-11-06 18:47:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:29,650 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:47:29,650 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:47:29,651 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 18:47:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:47:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-11-06 18:47:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:47:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-06 18:47:29,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-11-06 18:47:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:29,658 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-06 18:47:29,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:47:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-06 18:47:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:47:29,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:29,659 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 18:47:29,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:29,870 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:29,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 7 times [2019-11-06 18:47:29,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:29,872 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728975010] [2019-11-06 18:47:29,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,025 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 18:47:30,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728975010] [2019-11-06 18:47:30,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924713744] [2019-11-06 18:47:30,026 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 18:47:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:47:30,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:30,158 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 18:47:30,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:30,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2019-11-06 18:47:30,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118918022] [2019-11-06 18:47:30,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:47:30,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:47:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:47:30,160 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 19 states. [2019-11-06 18:47:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:30,377 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-11-06 18:47:30,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:47:30,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-06 18:47:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:30,379 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:47:30,379 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:47:30,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:47:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:47:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2019-11-06 18:47:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:47:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-06 18:47:30,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2019-11-06 18:47:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:30,387 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-06 18:47:30,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:47:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-06 18:47:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:47:30,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:30,389 INFO L410 BasicCegarLoop]: trace histogram [15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:30,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:30,590 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash 937962954, now seen corresponding path program 8 times [2019-11-06 18:47:30,591 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:30,591 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849899419] [2019-11-06 18:47:30,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-06 18:47:30,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849899419] [2019-11-06 18:47:30,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635108392] [2019-11-06 18:47:30,702 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 18:47:30,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:30,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:30,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:47:30,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:30,905 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:30,905 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 24 [2019-11-06 18:47:30,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214811477] [2019-11-06 18:47:30,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:47:30,906 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:30,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:47:30,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:47:30,909 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 24 states. [2019-11-06 18:47:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:31,132 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-11-06 18:47:31,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:47:31,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2019-11-06 18:47:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:31,134 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:47:31,134 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 18:47:31,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:47:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 18:47:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2019-11-06 18:47:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:47:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-06 18:47:31,143 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 38 [2019-11-06 18:47:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:31,143 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-06 18:47:31,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:47:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-06 18:47:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:47:31,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:31,145 INFO L410 BasicCegarLoop]: trace histogram [20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:31,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:31,356 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2101408535, now seen corresponding path program 9 times [2019-11-06 18:47:31,357 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:31,357 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451583162] [2019-11-06 18:47:31,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:47:31,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451583162] [2019-11-06 18:47:31,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423872618] [2019-11-06 18:47:31,503 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 18:47:31,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:47:31,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:31,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:47:31,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:47:31,908 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:31,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:47:31,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522074939] [2019-11-06 18:47:31,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:31,909 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:31,910 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2019-11-06 18:47:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:32,132 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2019-11-06 18:47:32,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:32,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-06 18:47:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:32,134 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:47:32,134 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:47:32,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:47:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2019-11-06 18:47:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:47:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-06 18:47:32,142 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2019-11-06 18:47:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:32,142 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-06 18:47:32,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-06 18:47:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:47:32,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:32,144 INFO L410 BasicCegarLoop]: trace histogram [20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:32,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:32,349 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1457951366, now seen corresponding path program 10 times [2019-11-06 18:47:32,350 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:32,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702832613] [2019-11-06 18:47:32,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:47:32,507 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702832613] [2019-11-06 18:47:32,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879545304] [2019-11-06 18:47:32,508 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 18:47:32,601 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:32,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:32,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:47:32,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:32,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:32,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 29 [2019-11-06 18:47:32,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791881622] [2019-11-06 18:47:32,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:47:32,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:47:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:47:32,803 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2019-11-06 18:47:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:33,131 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2019-11-06 18:47:33,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:47:33,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2019-11-06 18:47:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:33,132 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:47:33,132 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:47:33,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:47:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:47:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2019-11-06 18:47:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:47:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-06 18:47:33,149 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2019-11-06 18:47:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:33,149 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-06 18:47:33,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:47:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-06 18:47:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:47:33,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:33,150 INFO L410 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:33,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:33,352 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2048897253, now seen corresponding path program 11 times [2019-11-06 18:47:33,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:33,353 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194023861] [2019-11-06 18:47:33,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-06 18:47:33,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194023861] [2019-11-06 18:47:33,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53090267] [2019-11-06 18:47:33,512 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 18:47:50,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-06 18:47:50,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:50,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:47:50,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-06 18:47:50,804 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:50,804 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:47:50,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895915964] [2019-11-06 18:47:50,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:47:50,805 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:47:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:47:50,805 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 16 states. [2019-11-06 18:47:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:50,991 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2019-11-06 18:47:50,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:47:50,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-06 18:47:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:50,992 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:47:50,992 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:47:50,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:47:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:47:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2019-11-06 18:47:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:47:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-06 18:47:51,009 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2019-11-06 18:47:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:51,010 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-06 18:47:51,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:47:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-06 18:47:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:47:51,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:51,011 INFO L410 BasicCegarLoop]: trace histogram [25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:51,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:51,228 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1268411914, now seen corresponding path program 12 times [2019-11-06 18:47:51,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:51,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59884820] [2019-11-06 18:47:51,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-06 18:47:51,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59884820] [2019-11-06 18:47:51,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407074634] [2019-11-06 18:47:51,407 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