/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:39,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:39,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:39,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:39,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:39,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:39,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:39,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:39,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:39,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:39,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:39,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:39,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:39,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:39,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:39,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:39,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:39,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:39,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:39,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:39,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:39,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:39,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:39,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:39,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:39,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:39,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:39,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:39,388 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 [2019-11-23 20:18:39,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:39,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:39,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:39,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:39,409 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:39,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:39,409 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:39,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:39,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:39,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:39,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:39,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:39,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:39,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:39,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:39,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:39,412 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:39,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:39,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:39,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:39,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:39,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:39,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:39,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:39,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:39,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:39,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:39,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:39,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:39,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:39,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:39,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:39,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:39,704 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:39,704 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:39,705 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-11-23 20:18:39,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88bb456/2f3cd5b3fdd74e91abd33bf0c37fe324/FLAGd0c770633 [2019-11-23 20:18:40,229 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:40,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-11-23 20:18:40,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88bb456/2f3cd5b3fdd74e91abd33bf0c37fe324/FLAGd0c770633 [2019-11-23 20:18:40,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de88bb456/2f3cd5b3fdd74e91abd33bf0c37fe324 [2019-11-23 20:18:40,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:40,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:40,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:40,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:40,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:40,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:40,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b41df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40, skipping insertion in model container [2019-11-23 20:18:40,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:40,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:40,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:40,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:40,863 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:40,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:40,911 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:40,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40 WrapperNode [2019-11-23 20:18:40,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:40,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:40,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:40,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:40,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:41,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:41,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:41,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:41,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (1/1) ... [2019-11-23 20:18:41,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:41,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:41,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:41,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:41,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (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 [2019-11-23 20:18:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:41,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:41,454 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:41,454 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:18:41,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:41 BoogieIcfgContainer [2019-11-23 20:18:41,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:41,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:41,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:41,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:40" (1/3) ... [2019-11-23 20:18:41,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bd7f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:41, skipping insertion in model container [2019-11-23 20:18:41,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:40" (2/3) ... [2019-11-23 20:18:41,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bd7f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:41, skipping insertion in model container [2019-11-23 20:18:41,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:41" (3/3) ... [2019-11-23 20:18:41,471 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2019-11-23 20:18:41,481 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:41,491 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:18:41,501 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:18:41,522 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:41,522 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:41,522 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:41,523 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:41,523 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:41,523 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:41,523 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:41,523 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-23 20:18:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:18:41,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:41,545 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:41,546 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:41,551 INFO L82 PathProgramCache]: Analyzing trace with hash 660668040, now seen corresponding path program 1 times [2019-11-23 20:18:41,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:41,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129787180] [2019-11-23 20:18:41,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:41,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129787180] [2019-11-23 20:18:41,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:41,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:41,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614389312] [2019-11-23 20:18:41,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:41,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:41,716 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-23 20:18:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:41,785 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2019-11-23 20:18:41,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:41,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:18:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:41,797 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:18:41,797 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:18:41,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:18:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:18:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:18:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:18:41,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2019-11-23 20:18:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:41,838 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:18:41,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:18:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:18:41,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:41,839 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:41,840 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1809603638, now seen corresponding path program 1 times [2019-11-23 20:18:41,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:41,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822037602] [2019-11-23 20:18:41,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:41,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822037602] [2019-11-23 20:18:41,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:41,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414436484] [2019-11-23 20:18:41,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:41,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:41,902 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2019-11-23 20:18:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:41,963 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2019-11-23 20:18:41,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:41,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:18:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:41,965 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:18:41,966 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:18:41,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:18:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-11-23 20:18:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:18:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:18:41,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 13 [2019-11-23 20:18:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:41,975 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:18:41,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:18:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:18:41,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:41,976 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:41,976 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -360176816, now seen corresponding path program 1 times [2019-11-23 20:18:41,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:41,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707312508] [2019-11-23 20:18:41,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:42,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707312508] [2019-11-23 20:18:42,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532946389] [2019-11-23 20:18:42,029 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 [2019-11-23 20:18:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:42,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:18:42,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476262047] [2019-11-23 20:18:42,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:42,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:42,128 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 6 states. [2019-11-23 20:18:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,242 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2019-11-23 20:18:42,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:18:42,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:18:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,243 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:18:42,243 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:18:42,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:18:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-11-23 20:18:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:18:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-23 20:18:42,251 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 16 [2019-11-23 20:18:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,252 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-23 20:18:42,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-23 20:18:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:18:42,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,253 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:42,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:42,460 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 416837296, now seen corresponding path program 2 times [2019-11-23 20:18:42,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:42,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451460705] [2019-11-23 20:18:42,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:18:42,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451460705] [2019-11-23 20:18:42,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147555813] [2019-11-23 20:18:42,569 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 [2019-11-23 20:18:42,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:42,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:42,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:42,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:42,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:42,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2019-11-23 20:18:42,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704815528] [2019-11-23 20:18:42,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:18:42,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:18:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:42,688 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2019-11-23 20:18:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,781 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2019-11-23 20:18:42,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:18:42,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-23 20:18:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,782 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:18:42,782 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:18:42,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:18:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-11-23 20:18:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:18:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2019-11-23 20:18:42,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2019-11-23 20:18:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,801 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2019-11-23 20:18:42,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:18:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2019-11-23 20:18:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:18:42,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,804 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,005 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 939517080, now seen corresponding path program 3 times [2019-11-23 20:18:43,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113500581] [2019-11-23 20:18:43,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:43,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113500581] [2019-11-23 20:18:43,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749885821] [2019-11-23 20:18:43,110 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 [2019-11-23 20:18:43,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:18:43,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:43,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:43,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:43,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:43,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-23 20:18:43,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704333554] [2019-11-23 20:18:43,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:43,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:43,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:43,198 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2019-11-23 20:18:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:43,286 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2019-11-23 20:18:43,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:18:43,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-23 20:18:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:43,288 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:18:43,288 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:18:43,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:18:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-23 20:18:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:18:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-11-23 20:18:43,295 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 30 [2019-11-23 20:18:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:43,296 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-23 20:18:43,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-11-23 20:18:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:18:43,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:43,297 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,498 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash -981194834, now seen corresponding path program 4 times [2019-11-23 20:18:43,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829524295] [2019-11-23 20:18:43,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:43,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829524295] [2019-11-23 20:18:43,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044162164] [2019-11-23 20:18:43,640 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 [2019-11-23 20:18:43,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:43,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:43,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:43,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:18:43,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:43,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2019-11-23 20:18:43,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928724207] [2019-11-23 20:18:43,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:18:43,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:18:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:43,730 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 9 states. [2019-11-23 20:18:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:43,848 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2019-11-23 20:18:43,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:18:43,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-11-23 20:18:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:43,850 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:18:43,850 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:18:43,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:18:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-11-23 20:18:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:18:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2019-11-23 20:18:43,857 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 33 [2019-11-23 20:18:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:43,859 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2019-11-23 20:18:43,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:18:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2019-11-23 20:18:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:43,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:43,860 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:44,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:44,061 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1962867620, now seen corresponding path program 5 times [2019-11-23 20:18:44,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:44,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037389250] [2019-11-23 20:18:44,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:18:44,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037389250] [2019-11-23 20:18:44,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059682083] [2019-11-23 20:18:44,160 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 [2019-11-23 20:18:44,240 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-23 20:18:44,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:18:44,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-23 20:18:44,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513267126] [2019-11-23 20:18:44,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:44,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:44,268 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 8 states. [2019-11-23 20:18:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:44,377 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2019-11-23 20:18:44,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:44,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-23 20:18:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:44,379 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:18:44,379 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:18:44,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:18:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-11-23 20:18:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:18:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-11-23 20:18:44,387 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 40 [2019-11-23 20:18:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:44,388 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-11-23 20:18:44,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-11-23 20:18:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:18:44,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:44,389 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:44,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:44,593 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash 357810538, now seen corresponding path program 6 times [2019-11-23 20:18:44,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:44,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587333857] [2019-11-23 20:18:44,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:18:44,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587333857] [2019-11-23 20:18:44,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057628432] [2019-11-23 20:18:44,752 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 [2019-11-23 20:18:44,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-23 20:18:44,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:18:44,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-11-23 20:18:44,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223191282] [2019-11-23 20:18:44,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:44,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:44,848 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 11 states. [2019-11-23 20:18:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:44,951 INFO L93 Difference]: Finished difference Result 117 states and 157 transitions. [2019-11-23 20:18:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:44,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-11-23 20:18:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:44,952 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:18:44,952 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:18:44,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:18:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-11-23 20:18:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:18:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2019-11-23 20:18:44,959 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 43 [2019-11-23 20:18:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:44,960 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2019-11-23 20:18:44,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2019-11-23 20:18:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:18:44,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:44,961 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:45,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:45,165 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1049777120, now seen corresponding path program 7 times [2019-11-23 20:18:45,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:45,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074878168] [2019-11-23 20:18:45,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:18:45,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074878168] [2019-11-23 20:18:45,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073842827] [2019-11-23 20:18:45,296 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 [2019-11-23 20:18:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:45,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:18:45,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:18:45,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:45,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2019-11-23 20:18:45,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332779005] [2019-11-23 20:18:45,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:45,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:45,389 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 12 states. [2019-11-23 20:18:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:45,495 INFO L93 Difference]: Finished difference Result 127 states and 170 transitions. [2019-11-23 20:18:45,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:45,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2019-11-23 20:18:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:45,497 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:18:45,497 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:18:45,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:18:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2019-11-23 20:18:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:18:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2019-11-23 20:18:45,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 50 [2019-11-23 20:18:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:45,505 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2019-11-23 20:18:45,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2019-11-23 20:18:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:18:45,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:45,506 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:45,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:45,715 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash -306341020, now seen corresponding path program 8 times [2019-11-23 20:18:45,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:45,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748080912] [2019-11-23 20:18:45,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:18:45,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748080912] [2019-11-23 20:18:45,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749878259] [2019-11-23 20:18:45,835 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 [2019-11-23 20:18:45,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:45,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:45,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:18:45,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:18:45,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:45,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 13 [2019-11-23 20:18:45,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21760965] [2019-11-23 20:18:45,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:18:45,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:45,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:18:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:45,947 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 13 states. [2019-11-23 20:18:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:46,071 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2019-11-23 20:18:46,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:46,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-11-23 20:18:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:46,073 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:18:46,073 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:18:46,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:18:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2019-11-23 20:18:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:18:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2019-11-23 20:18:46,082 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 55 [2019-11-23 20:18:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:46,082 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2019-11-23 20:18:46,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:18:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2019-11-23 20:18:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:18:46,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:46,083 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:46,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:46,288 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash -235529244, now seen corresponding path program 9 times [2019-11-23 20:18:46,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:46,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145938185] [2019-11-23 20:18:46,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:18:46,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145938185] [2019-11-23 20:18:46,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357261625] [2019-11-23 20:18:46,427 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 [2019-11-23 20:18:46,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:18:46,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:46,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:18:46,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:18:46,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:46,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-23 20:18:46,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294903927] [2019-11-23 20:18:46,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:46,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:46,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:46,557 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 12 states. [2019-11-23 20:18:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:46,696 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2019-11-23 20:18:46,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:46,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2019-11-23 20:18:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:46,698 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:18:46,698 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:18:46,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:18:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-11-23 20:18:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:18:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2019-11-23 20:18:46,704 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 60 [2019-11-23 20:18:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:46,704 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2019-11-23 20:18:46,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2019-11-23 20:18:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:18:46,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:46,706 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:46,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:46,909 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1492196578, now seen corresponding path program 10 times [2019-11-23 20:18:46,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:46,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037844458] [2019-11-23 20:18:46,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:18:47,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037844458] [2019-11-23 20:18:47,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2378424] [2019-11-23 20:18:47,046 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 [2019-11-23 20:18:47,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:47,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:47,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:47,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:18:47,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:47,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 15 [2019-11-23 20:18:47,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199993195] [2019-11-23 20:18:47,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:18:47,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:47,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:18:47,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:47,137 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 15 states. [2019-11-23 20:18:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:47,290 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2019-11-23 20:18:47,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:47,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-23 20:18:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:47,292 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:18:47,292 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:18:47,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:18:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2019-11-23 20:18:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:18:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2019-11-23 20:18:47,307 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 63 [2019-11-23 20:18:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:47,307 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2019-11-23 20:18:47,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:18:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2019-11-23 20:18:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:18:47,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:47,311 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:47,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:47,524 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -817196120, now seen corresponding path program 11 times [2019-11-23 20:18:47,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:47,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080194779] [2019-11-23 20:18:47,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:18:47,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080194779] [2019-11-23 20:18:47,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066646657] [2019-11-23 20:18:47,653 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 [2019-11-23 20:18:47,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:18:47,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:47,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:47,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:18:47,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:47,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-11-23 20:18:47,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155289519] [2019-11-23 20:18:47,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:18:47,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:18:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:47,855 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 14 states. [2019-11-23 20:18:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:48,049 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2019-11-23 20:18:48,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:18:48,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2019-11-23 20:18:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:48,054 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:18:48,054 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:18:48,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:18:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2019-11-23 20:18:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:18:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2019-11-23 20:18:48,059 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 70 [2019-11-23 20:18:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:48,060 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2019-11-23 20:18:48,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:18:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2019-11-23 20:18:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:18:48,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:48,061 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:48,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:48,268 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:48,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1047634274, now seen corresponding path program 12 times [2019-11-23 20:18:48,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:48,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842122342] [2019-11-23 20:18:48,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:18:48,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842122342] [2019-11-23 20:18:48,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770366603] [2019-11-23 20:18:48,485 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 [2019-11-23 20:18:48,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 20:18:48,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:48,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:18:48,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:18:48,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:48,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-11-23 20:18:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916297046] [2019-11-23 20:18:48,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:18:48,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:18:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:48,792 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2019-11-23 20:18:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:48,965 INFO L93 Difference]: Finished difference Result 177 states and 241 transitions. [2019-11-23 20:18:48,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:18:48,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2019-11-23 20:18:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:48,966 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:18:48,966 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:18:48,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:18:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2019-11-23 20:18:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:18:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2019-11-23 20:18:48,977 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 73 [2019-11-23 20:18:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:48,977 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2019-11-23 20:18:48,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:18:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2019-11-23 20:18:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:18:48,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:48,979 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:49,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:49,184 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash -333753492, now seen corresponding path program 13 times [2019-11-23 20:18:49,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:49,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288160461] [2019-11-23 20:18:49,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:18:49,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288160461] [2019-11-23 20:18:49,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183783266] [2019-11-23 20:18:49,344 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:49,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:18:49,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:18:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:49,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 18 [2019-11-23 20:18:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687159604] [2019-11-23 20:18:49,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:18:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:18:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:49,436 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand 18 states. [2019-11-23 20:18:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:49,628 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2019-11-23 20:18:49,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:18:49,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-11-23 20:18:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:49,630 INFO L225 Difference]: With dead ends: 187 [2019-11-23 20:18:49,630 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:18:49,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:18:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2019-11-23 20:18:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-23 20:18:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2019-11-23 20:18:49,637 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 80 [2019-11-23 20:18:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:49,637 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2019-11-23 20:18:49,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:18:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2019-11-23 20:18:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:18:49,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:49,638 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:49,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:49,842 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash -179331048, now seen corresponding path program 14 times [2019-11-23 20:18:49,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:49,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53065360] [2019-11-23 20:18:49,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:18:50,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53065360] [2019-11-23 20:18:50,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529908417] [2019-11-23 20:18:50,053 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:50,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:50,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:50,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:18:50,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:18:50,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:50,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 19 [2019-11-23 20:18:50,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406812955] [2019-11-23 20:18:50,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:18:50,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:18:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:50,163 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand 19 states. [2019-11-23 20:18:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:50,316 INFO L93 Difference]: Finished difference Result 197 states and 268 transitions. [2019-11-23 20:18:50,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:18:50,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2019-11-23 20:18:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:50,317 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:18:50,317 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:18:50,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:18:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2019-11-23 20:18:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:18:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2019-11-23 20:18:50,322 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 85 [2019-11-23 20:18:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:50,323 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2019-11-23 20:18:50,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:18:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2019-11-23 20:18:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 20:18:50,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:50,324 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:50,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:50,527 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -15164624, now seen corresponding path program 15 times [2019-11-23 20:18:50,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:50,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727554675] [2019-11-23 20:18:50,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:18:50,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727554675] [2019-11-23 20:18:50,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900229677] [2019-11-23 20:18:50,713 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:50,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:18:50,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:50,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:18:50,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:18:50,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:50,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-11-23 20:18:50,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216179650] [2019-11-23 20:18:50,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:18:50,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:18:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:50,942 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand 18 states. [2019-11-23 20:18:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,151 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2019-11-23 20:18:51,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:18:51,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2019-11-23 20:18:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,152 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:18:51,153 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:18:51,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:18:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-11-23 20:18:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:18:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 158 transitions. [2019-11-23 20:18:51,158 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 158 transitions. Word has length 90 [2019-11-23 20:18:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,158 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 158 transitions. [2019-11-23 20:18:51,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:18:51,159 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 158 transitions. [2019-11-23 20:18:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:18:51,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,160 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,365 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -630404586, now seen corresponding path program 16 times [2019-11-23 20:18:51,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747133522] [2019-11-23 20:18:51,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:18:51,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747133522] [2019-11-23 20:18:51,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708238848] [2019-11-23 20:18:51,575 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,648 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:51,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:51,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:18:51,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:18:51,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:51,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 21 [2019-11-23 20:18:51,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976524216] [2019-11-23 20:18:51,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:18:51,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:18:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:51,682 INFO L87 Difference]: Start difference. First operand 121 states and 158 transitions. Second operand 21 states. [2019-11-23 20:18:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,930 INFO L93 Difference]: Finished difference Result 217 states and 297 transitions. [2019-11-23 20:18:51,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:51,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-11-23 20:18:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,932 INFO L225 Difference]: With dead ends: 217 [2019-11-23 20:18:51,932 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 20:18:51,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 20:18:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2019-11-23 20:18:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:18:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2019-11-23 20:18:51,938 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 93 [2019-11-23 20:18:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,938 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2019-11-23 20:18:51,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:18:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2019-11-23 20:18:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 20:18:51,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,939 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:52,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,144 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 653437684, now seen corresponding path program 17 times [2019-11-23 20:18:52,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:52,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727332351] [2019-11-23 20:18:52,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 20:18:52,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727332351] [2019-11-23 20:18:52,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352376600] [2019-11-23 20:18:52,361 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,767 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-23 20:18:52,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:52,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:18:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:18:52,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:52,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 22 [2019-11-23 20:18:52,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722707353] [2019-11-23 20:18:52,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:52,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:52,809 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand 22 states. [2019-11-23 20:18:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:53,005 INFO L93 Difference]: Finished difference Result 227 states and 310 transitions. [2019-11-23 20:18:53,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:18:53,007 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2019-11-23 20:18:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:53,008 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:18:53,008 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:18:53,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:18:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2019-11-23 20:18:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 20:18:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2019-11-23 20:18:53,013 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 100 [2019-11-23 20:18:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:53,013 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2019-11-23 20:18:53,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:18:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2019-11-23 20:18:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:18:53,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:53,014 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:53,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,215 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2147446928, now seen corresponding path program 18 times [2019-11-23 20:18:53,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:53,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11563123] [2019-11-23 20:18:53,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:18:53,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11563123] [2019-11-23 20:18:53,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150102897] [2019-11-23 20:18:53,498 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,864 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:18:53,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:53,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:18:53,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:18:53,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:53,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-11-23 20:18:53,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275152490] [2019-11-23 20:18:53,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:18:53,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:18:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:53,889 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand 21 states. [2019-11-23 20:18:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:54,105 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2019-11-23 20:18:54,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:54,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-11-23 20:18:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:54,107 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:18:54,107 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:18:54,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:18:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2019-11-23 20:18:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 20:18:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2019-11-23 20:18:54,112 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 105 [2019-11-23 20:18:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:54,113 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2019-11-23 20:18:54,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:18:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2019-11-23 20:18:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-23 20:18:54,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,114 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:54,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:54,315 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1220901046, now seen corresponding path program 19 times [2019-11-23 20:18:54,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:54,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253234734] [2019-11-23 20:18:54,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:18:54,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253234734] [2019-11-23 20:18:54,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194608198] [2019-11-23 20:18:54,574 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:18:54,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:18:54,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:54,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 24 [2019-11-23 20:18:54,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863736560] [2019-11-23 20:18:54,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:54,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:54,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:54,695 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand 24 states. [2019-11-23 20:18:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:54,920 INFO L93 Difference]: Finished difference Result 247 states and 339 transitions. [2019-11-23 20:18:54,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:18:54,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2019-11-23 20:18:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:54,922 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:18:54,922 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:18:54,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:18:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2019-11-23 20:18:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:18:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2019-11-23 20:18:54,927 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 108 [2019-11-23 20:18:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:54,927 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2019-11-23 20:18:54,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2019-11-23 20:18:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:18:54,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,929 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:55,132 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1434993460, now seen corresponding path program 20 times [2019-11-23 20:18:55,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349988488] [2019-11-23 20:18:55,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:18:55,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349988488] [2019-11-23 20:18:55,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243018919] [2019-11-23 20:18:55,414 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:55,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:55,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:55,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:18:55,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:18:55,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:55,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 25 [2019-11-23 20:18:55,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779112742] [2019-11-23 20:18:55,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:18:55,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:18:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:18:55,524 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand 25 states. [2019-11-23 20:18:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,786 INFO L93 Difference]: Finished difference Result 257 states and 352 transitions. [2019-11-23 20:18:55,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:18:55,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2019-11-23 20:18:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,788 INFO L225 Difference]: With dead ends: 257 [2019-11-23 20:18:55,788 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 20:18:55,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:18:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 20:18:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2019-11-23 20:18:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-23 20:18:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2019-11-23 20:18:55,795 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 115 [2019-11-23 20:18:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,796 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2019-11-23 20:18:55,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:18:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2019-11-23 20:18:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 20:18:55,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,797 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:56,017 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash -805428612, now seen corresponding path program 21 times [2019-11-23 20:18:56,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523780436] [2019-11-23 20:18:56,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:18:56,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523780436] [2019-11-23 20:18:56,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797463563] [2019-11-23 20:18:56,326 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 20:18:57,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:18:57,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-11-23 20:18:57,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820191974] [2019-11-23 20:18:57,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:57,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:57,142 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand 24 states. [2019-11-23 20:18:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,434 INFO L93 Difference]: Finished difference Result 176 states and 230 transitions. [2019-11-23 20:18:57,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:18:57,434 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2019-11-23 20:18:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,435 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:18:57,435 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:18:57,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:18:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2019-11-23 20:18:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 20:18:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2019-11-23 20:18:57,440 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 120 [2019-11-23 20:18:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,441 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2019-11-23 20:18:57,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2019-11-23 20:18:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:18:57,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,442 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,646 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1625845578, now seen corresponding path program 22 times [2019-11-23 20:18:57,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604794151] [2019-11-23 20:18:57,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:18:57,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604794151] [2019-11-23 20:18:57,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210185277] [2019-11-23 20:18:57,959 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:58,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:58,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:18:58,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 27 [2019-11-23 20:18:58,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142032033] [2019-11-23 20:18:58,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:18:58,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:18:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:58,083 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand 27 states. [2019-11-23 20:18:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,397 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2019-11-23 20:18:58,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:18:58,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-11-23 20:18:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,399 INFO L225 Difference]: With dead ends: 277 [2019-11-23 20:18:58,399 INFO L226 Difference]: Without dead ends: 169 [2019-11-23 20:18:58,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-23 20:18:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2019-11-23 20:18:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 20:18:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2019-11-23 20:18:58,403 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 123 [2019-11-23 20:18:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,403 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2019-11-23 20:18:58,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:18:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2019-11-23 20:18:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-23 20:18:58,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,404 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,605 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -91223488, now seen corresponding path program 23 times [2019-11-23 20:18:58,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445215336] [2019-11-23 20:18:58,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-23 20:18:59,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445215336] [2019-11-23 20:18:59,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535248261] [2019-11-23 20:18:59,042 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,989 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-11-23 20:18:59,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-11-23 20:19:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 28 [2019-11-23 20:19:00,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990964382] [2019-11-23 20:19:00,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:19:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:19:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:00,025 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand 28 states. [2019-11-23 20:19:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,301 INFO L93 Difference]: Finished difference Result 287 states and 394 transitions. [2019-11-23 20:19:00,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:19:00,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 130 [2019-11-23 20:19:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,303 INFO L225 Difference]: With dead ends: 287 [2019-11-23 20:19:00,303 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:19:00,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:19:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2019-11-23 20:19:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-23 20:19:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2019-11-23 20:19:00,310 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 130 [2019-11-23 20:19:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,311 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2019-11-23 20:19:00,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:19:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2019-11-23 20:19:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:19:00,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,312 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,518 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash -390603452, now seen corresponding path program 24 times [2019-11-23 20:19:00,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039199499] [2019-11-23 20:19:00,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:19:00,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039199499] [2019-11-23 20:19:00,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491369086] [2019-11-23 20:19:00,882 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-11-23 20:19:04,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:04,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:19:04,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-23 20:19:04,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:04,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 29 [2019-11-23 20:19:04,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766017099] [2019-11-23 20:19:04,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:19:04,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:19:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:04,132 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand 29 states. [2019-11-23 20:19:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:04,491 INFO L93 Difference]: Finished difference Result 297 states and 408 transitions. [2019-11-23 20:19:04,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:19:04,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 135 [2019-11-23 20:19:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:04,494 INFO L225 Difference]: With dead ends: 297 [2019-11-23 20:19:04,494 INFO L226 Difference]: Without dead ends: 181 [2019-11-23 20:19:04,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-23 20:19:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-11-23 20:19:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:19:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2019-11-23 20:19:04,502 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 135 [2019-11-23 20:19:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:04,502 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2019-11-23 20:19:04,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:19:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2019-11-23 20:19:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 20:19:04,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:04,504 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:04,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,712 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 348109316, now seen corresponding path program 25 times [2019-11-23 20:19:04,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:04,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528019286] [2019-11-23 20:19:04,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:19:05,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528019286] [2019-11-23 20:19:05,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018775047] [2019-11-23 20:19:05,242 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:05,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:19:05,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-23 20:19:05,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:05,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 30 [2019-11-23 20:19:05,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338943186] [2019-11-23 20:19:05,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:05,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:05,390 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand 30 states. [2019-11-23 20:19:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:05,754 INFO L93 Difference]: Finished difference Result 307 states and 422 transitions. [2019-11-23 20:19:05,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:19:05,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 140 [2019-11-23 20:19:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:05,756 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:19:05,756 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 20:19:05,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 20:19:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2019-11-23 20:19:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-11-23 20:19:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2019-11-23 20:19:05,763 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 140 [2019-11-23 20:19:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:05,763 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2019-11-23 20:19:05,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2019-11-23 20:19:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:19:05,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:05,764 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:05,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:05,968 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1579102592, now seen corresponding path program 26 times [2019-11-23 20:19:05,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:05,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187806263] [2019-11-23 20:19:05,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-23 20:19:06,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187806263] [2019-11-23 20:19:06,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837601617] [2019-11-23 20:19:06,536 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:06,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:06,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:06,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:19:06,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-11-23 20:19:06,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:06,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 31 [2019-11-23 20:19:06,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587901560] [2019-11-23 20:19:06,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:19:06,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:19:06,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:06,671 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand 31 states. [2019-11-23 20:19:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:06,969 INFO L93 Difference]: Finished difference Result 317 states and 436 transitions. [2019-11-23 20:19:06,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:06,969 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 145 [2019-11-23 20:19:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:06,971 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:19:06,971 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 20:19:06,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 20:19:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2019-11-23 20:19:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-11-23 20:19:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2019-11-23 20:19:06,977 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 145 [2019-11-23 20:19:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:06,977 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2019-11-23 20:19:06,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:19:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2019-11-23 20:19:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-23 20:19:06,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:06,979 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:07,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,183 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1094545864, now seen corresponding path program 27 times [2019-11-23 20:19:07,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:07,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223052160] [2019-11-23 20:19:07,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:07,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223052160] [2019-11-23 20:19:07,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296619997] [2019-11-23 20:19:07,673 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:10,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 20:19:10,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:10,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:19:10,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:10,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:10,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2019-11-23 20:19:10,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600229334] [2019-11-23 20:19:10,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:10,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:10,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:10,776 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand 30 states. [2019-11-23 20:19:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:11,109 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2019-11-23 20:19:11,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:19:11,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-11-23 20:19:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:11,112 INFO L225 Difference]: With dead ends: 212 [2019-11-23 20:19:11,112 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 20:19:11,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 20:19:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2019-11-23 20:19:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-11-23 20:19:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 254 transitions. [2019-11-23 20:19:11,118 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 254 transitions. Word has length 150 [2019-11-23 20:19:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:11,118 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 254 transitions. [2019-11-23 20:19:11,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 254 transitions. [2019-11-23 20:19:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 20:19:11,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:11,120 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:11,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:11,326 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash 391466110, now seen corresponding path program 28 times [2019-11-23 20:19:11,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:11,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325999674] [2019-11-23 20:19:11,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:11,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325999674] [2019-11-23 20:19:11,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927767578] [2019-11-23 20:19:11,915 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:12,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:12,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:19:12,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:12,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:12,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2019-11-23 20:19:12,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065810259] [2019-11-23 20:19:12,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:19:12,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:19:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:12,046 INFO L87 Difference]: Start difference. First operand 193 states and 254 transitions. Second operand 31 states. [2019-11-23 20:19:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:12,400 INFO L93 Difference]: Finished difference Result 217 states and 285 transitions. [2019-11-23 20:19:12,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:12,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2019-11-23 20:19:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:12,402 INFO L225 Difference]: With dead ends: 217 [2019-11-23 20:19:12,402 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 20:19:12,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 20:19:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2019-11-23 20:19:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:19:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 260 transitions. [2019-11-23 20:19:12,409 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 260 transitions. Word has length 153 [2019-11-23 20:19:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:12,410 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 260 transitions. [2019-11-23 20:19:12,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:19:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 260 transitions. [2019-11-23 20:19:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-23 20:19:12,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:12,411 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:12,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,614 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:12,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1498017288, now seen corresponding path program 29 times [2019-11-23 20:19:12,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:12,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211772650] [2019-11-23 20:19:12,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:13,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211772650] [2019-11-23 20:19:13,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558893231] [2019-11-23 20:19:13,259 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:14,969 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:19:14,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:14,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:19:14,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:15,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:15,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2019-11-23 20:19:15,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420530906] [2019-11-23 20:19:15,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:19:15,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:15,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:19:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:15,007 INFO L87 Difference]: Start difference. First operand 197 states and 260 transitions. Second operand 32 states. [2019-11-23 20:19:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:15,393 INFO L93 Difference]: Finished difference Result 343 states and 474 transitions. [2019-11-23 20:19:15,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:19:15,393 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2019-11-23 20:19:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:15,394 INFO L225 Difference]: With dead ends: 343 [2019-11-23 20:19:15,395 INFO L226 Difference]: Without dead ends: 207 [2019-11-23 20:19:15,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-23 20:19:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2019-11-23 20:19:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-23 20:19:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 268 transitions. [2019-11-23 20:19:15,400 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 268 transitions. Word has length 156 [2019-11-23 20:19:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:15,400 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 268 transitions. [2019-11-23 20:19:15,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:19:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 268 transitions. [2019-11-23 20:19:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:19:15,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:15,401 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:15,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:15,608 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash -561966340, now seen corresponding path program 30 times [2019-11-23 20:19:15,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:15,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036568613] [2019-11-23 20:19:15,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:19:16,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036568613] [2019-11-23 20:19:16,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792848360] [2019-11-23 20:19:16,184 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:27,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:19:27,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:27,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:19:27,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:19:28,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:28,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2019-11-23 20:19:28,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234426711] [2019-11-23 20:19:28,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:19:28,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:19:28,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:28,027 INFO L87 Difference]: Start difference. First operand 203 states and 268 transitions. Second operand 33 states. [2019-11-23 20:19:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:28,410 INFO L93 Difference]: Finished difference Result 353 states and 488 transitions. [2019-11-23 20:19:28,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:19:28,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2019-11-23 20:19:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:28,412 INFO L225 Difference]: With dead ends: 353 [2019-11-23 20:19:28,413 INFO L226 Difference]: Without dead ends: 213 [2019-11-23 20:19:28,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-23 20:19:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2019-11-23 20:19:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 20:19:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2019-11-23 20:19:28,420 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 161 [2019-11-23 20:19:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:28,420 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2019-11-23 20:19:28,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:19:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2019-11-23 20:19:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:19:28,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:28,422 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:28,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:28,632 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1204816588, now seen corresponding path program 31 times [2019-11-23 20:19:28,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:28,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867858374] [2019-11-23 20:19:28,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 20:19:29,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867858374] [2019-11-23 20:19:29,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547370790] [2019-11-23 20:19:29,515 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:29,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:19:29,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-11-23 20:19:29,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:29,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2019-11-23 20:19:29,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133094181] [2019-11-23 20:19:29,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:19:29,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:19:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:29,650 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand 36 states. [2019-11-23 20:19:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:30,096 INFO L93 Difference]: Finished difference Result 367 states and 508 transitions. [2019-11-23 20:19:30,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:19:30,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2019-11-23 20:19:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:30,098 INFO L225 Difference]: With dead ends: 367 [2019-11-23 20:19:30,098 INFO L226 Difference]: Without dead ends: 223 [2019-11-23 20:19:30,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-11-23 20:19:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2019-11-23 20:19:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 20:19:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 288 transitions. [2019-11-23 20:19:30,107 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 288 transitions. Word has length 166 [2019-11-23 20:19:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:30,107 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 288 transitions. [2019-11-23 20:19:30,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:19:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 288 transitions. [2019-11-23 20:19:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 20:19:30,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:30,110 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:30,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:30,314 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1422967244, now seen corresponding path program 32 times [2019-11-23 20:19:30,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:30,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100180793] [2019-11-23 20:19:30,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-11-23 20:19:30,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100180793] [2019-11-23 20:19:30,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080731945] [2019-11-23 20:19:30,903 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:31,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:31,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:31,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:19:31,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-11-23 20:19:31,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:31,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 37 [2019-11-23 20:19:31,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134407812] [2019-11-23 20:19:31,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:19:31,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:19:31,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:19:31,053 INFO L87 Difference]: Start difference. First operand 219 states and 288 transitions. Second operand 37 states. [2019-11-23 20:19:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:31,408 INFO L93 Difference]: Finished difference Result 377 states and 520 transitions. [2019-11-23 20:19:31,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:19:31,408 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 175 [2019-11-23 20:19:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:31,409 INFO L225 Difference]: With dead ends: 377 [2019-11-23 20:19:31,410 INFO L226 Difference]: Without dead ends: 229 [2019-11-23 20:19:31,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:19:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-23 20:19:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2019-11-23 20:19:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-11-23 20:19:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2019-11-23 20:19:31,415 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 175 [2019-11-23 20:19:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:31,416 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2019-11-23 20:19:31,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:19:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2019-11-23 20:19:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-23 20:19:31,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:31,417 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:31,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:31,621 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 661473556, now seen corresponding path program 33 times [2019-11-23 20:19:31,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:31,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184742994] [2019-11-23 20:19:31,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 20:19:32,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184742994] [2019-11-23 20:19:32,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498224389] [2019-11-23 20:19:32,248 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:41,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 20:19:41,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:41,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:19:41,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 20:19:41,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:41,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2019-11-23 20:19:41,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685668588] [2019-11-23 20:19:41,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:19:41,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:19:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:41,845 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand 36 states. [2019-11-23 20:19:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:42,221 INFO L93 Difference]: Finished difference Result 248 states and 326 transitions. [2019-11-23 20:19:42,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:19:42,221 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 180 [2019-11-23 20:19:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:42,222 INFO L225 Difference]: With dead ends: 248 [2019-11-23 20:19:42,223 INFO L226 Difference]: Without dead ends: 232 [2019-11-23 20:19:42,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-11-23 20:19:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2019-11-23 20:19:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-11-23 20:19:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 302 transitions. [2019-11-23 20:19:42,228 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 302 transitions. Word has length 180 [2019-11-23 20:19:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:42,228 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 302 transitions. [2019-11-23 20:19:42,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:19:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 302 transitions. [2019-11-23 20:19:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 20:19:42,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:42,230 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:42,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:42,437 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash 816095666, now seen corresponding path program 34 times [2019-11-23 20:19:42,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:42,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637270452] [2019-11-23 20:19:42,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 20:19:43,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637270452] [2019-11-23 20:19:43,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32961184] [2019-11-23 20:19:43,177 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:43,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:43,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:43,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:43,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-11-23 20:19:43,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:43,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 39 [2019-11-23 20:19:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375294835] [2019-11-23 20:19:43,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:43,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:43,338 INFO L87 Difference]: Start difference. First operand 229 states and 302 transitions. Second operand 39 states. [2019-11-23 20:19:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:43,777 INFO L93 Difference]: Finished difference Result 397 states and 549 transitions. [2019-11-23 20:19:43,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:19:43,778 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2019-11-23 20:19:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:43,779 INFO L225 Difference]: With dead ends: 397 [2019-11-23 20:19:43,779 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 20:19:43,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 20:19:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2019-11-23 20:19:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-23 20:19:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 312 transitions. [2019-11-23 20:19:43,786 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 312 transitions. Word has length 183 [2019-11-23 20:19:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:43,786 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 312 transitions. [2019-11-23 20:19:43,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 312 transitions. [2019-11-23 20:19:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-23 20:19:43,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:43,788 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:43,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:43,991 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -200957736, now seen corresponding path program 35 times [2019-11-23 20:19:43,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:43,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634428883] [2019-11-23 20:19:43,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:44,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634428883] [2019-11-23 20:19:44,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176292550] [2019-11-23 20:19:44,829 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:48,027 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 20:19:48,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:48,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:48,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:48,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:48,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2019-11-23 20:19:48,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178819347] [2019-11-23 20:19:48,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:19:48,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:19:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:48,073 INFO L87 Difference]: Start difference. First operand 237 states and 312 transitions. Second operand 38 states. [2019-11-23 20:19:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:48,724 INFO L93 Difference]: Finished difference Result 260 states and 342 transitions. [2019-11-23 20:19:48,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:19:48,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 190 [2019-11-23 20:19:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:48,727 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:19:48,727 INFO L226 Difference]: Without dead ends: 244 [2019-11-23 20:19:48,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-23 20:19:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2019-11-23 20:19:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-23 20:19:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 318 transitions. [2019-11-23 20:19:48,737 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 318 transitions. Word has length 190 [2019-11-23 20:19:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:48,737 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 318 transitions. [2019-11-23 20:19:48,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:19:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 318 transitions. [2019-11-23 20:19:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:19:48,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:48,740 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:48,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:48,953 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 619840366, now seen corresponding path program 36 times [2019-11-23 20:19:48,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:48,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137010266] [2019-11-23 20:19:48,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:49,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137010266] [2019-11-23 20:19:49,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464583769] [2019-11-23 20:19:49,674 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:57,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2019-11-23 20:19:57,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:57,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:19:57,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:57,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:57,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2019-11-23 20:19:57,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198643043] [2019-11-23 20:19:57,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:57,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:57,448 INFO L87 Difference]: Start difference. First operand 241 states and 318 transitions. Second operand 39 states. [2019-11-23 20:19:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:57,901 INFO L93 Difference]: Finished difference Result 265 states and 349 transitions. [2019-11-23 20:19:57,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:19:57,902 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 193 [2019-11-23 20:19:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:57,903 INFO L225 Difference]: With dead ends: 265 [2019-11-23 20:19:57,903 INFO L226 Difference]: Without dead ends: 249 [2019-11-23 20:19:57,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-11-23 20:19:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2019-11-23 20:19:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-11-23 20:19:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 324 transitions. [2019-11-23 20:19:57,909 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 324 transitions. Word has length 193 [2019-11-23 20:19:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:57,909 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 324 transitions. [2019-11-23 20:19:57,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 324 transitions. [2019-11-23 20:19:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-23 20:19:57,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:57,911 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:58,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:58,112 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1767280920, now seen corresponding path program 37 times [2019-11-23 20:19:58,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:58,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3934990] [2019-11-23 20:19:58,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:58,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3934990] [2019-11-23 20:19:58,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139876041] [2019-11-23 20:19:58,771 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:58,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:19:58,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2019-11-23 20:19:58,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:58,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2019-11-23 20:19:58,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279180369] [2019-11-23 20:19:58,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:19:58,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:58,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:19:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:19:58,939 INFO L87 Difference]: Start difference. First operand 245 states and 324 transitions. Second operand 42 states. [2019-11-23 20:19:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:59,436 INFO L93 Difference]: Finished difference Result 427 states and 592 transitions. [2019-11-23 20:19:59,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:19:59,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 196 [2019-11-23 20:19:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:59,438 INFO L225 Difference]: With dead ends: 427 [2019-11-23 20:19:59,438 INFO L226 Difference]: Without dead ends: 259 [2019-11-23 20:19:59,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:19:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-11-23 20:19:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2019-11-23 20:19:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-23 20:19:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 336 transitions. [2019-11-23 20:19:59,445 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 336 transitions. Word has length 196 [2019-11-23 20:19:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:59,445 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 336 transitions. [2019-11-23 20:19:59,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:19:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 336 transitions. [2019-11-23 20:19:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 20:19:59,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:59,447 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:59,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:59,651 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash -359587096, now seen corresponding path program 38 times [2019-11-23 20:19:59,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:59,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257180264] [2019-11-23 20:19:59,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 20:20:00,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257180264] [2019-11-23 20:20:00,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333731031] [2019-11-23 20:20:00,332 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:00,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:00,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:00,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:20:00,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2019-11-23 20:20:00,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:00,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43] total 43 [2019-11-23 20:20:00,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770182941] [2019-11-23 20:20:00,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:20:00,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:20:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:20:00,513 INFO L87 Difference]: Start difference. First operand 255 states and 336 transitions. Second operand 43 states. [2019-11-23 20:20:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:01,042 INFO L93 Difference]: Finished difference Result 437 states and 604 transitions. [2019-11-23 20:20:01,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:20:01,042 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 205 [2019-11-23 20:20:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:01,043 INFO L225 Difference]: With dead ends: 437 [2019-11-23 20:20:01,044 INFO L226 Difference]: Without dead ends: 265 [2019-11-23 20:20:01,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:20:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-11-23 20:20:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2019-11-23 20:20:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2019-11-23 20:20:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 344 transitions. [2019-11-23 20:20:01,050 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 344 transitions. Word has length 205 [2019-11-23 20:20:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:01,050 INFO L462 AbstractCegarLoop]: Abstraction has 261 states and 344 transitions. [2019-11-23 20:20:01,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:20:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 344 transitions. [2019-11-23 20:20:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-23 20:20:01,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:01,052 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:01,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:01,255 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -618370976, now seen corresponding path program 39 times [2019-11-23 20:20:01,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:01,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859578258] [2019-11-23 20:20:01,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3943 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2019-11-23 20:20:02,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859578258] [2019-11-23 20:20:02,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784832153] [2019-11-23 20:20:02,026 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true